User Manual

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JT20

Issue 1.0

Operator’s

Manual

053-2633

CMW

Summary of content (195 pages)

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JT20 Operator’s Manual CMW® Issue 1.
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JT20 Operator’s Manual Overview - 1 Overview Chapter Contents Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 2 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Equipment Modification . . . . . . . . . . . . . . . . . . . . . . 3 Unit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Operator Orientation. . . . . . . . . . . . . . . . . . . . . . . . . 5 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . .
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JT20 Operator’s Manual Overview - 2 Serial Number Location Serial Number Location Record serial numbers and date of purchase in spaces provided. Drilling unit serial number is located as shown.
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JT20 Operator’s Manual Overview - 3 Intended Use Intended Use The JT20 is a self-contained horizontal directional drilling unit designed to install buried cable and pipe at distances to 400’ (122 m) depending on soil conditions. The unit is designed for operation in temperatures typically experienced in earth moving and construction work environments. Provisions may be required to operate in extreme temperatures. Contact your Ditch Witch® dealer.
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JT20 Operator’s Manual Overview - 4 Unit Components Unit Components 1 2 3 9 4 8 6 6 7 j10om001h.eps 1. Operator’s station 6. Pipeloader 2. Spindle 7. Tracks 3. Carriage 8. Vise wrenches 4. Drill frame 9. Anchoring system 5.
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JT20 Operator’s Manual Overview - 5 Operator Orientation Operator Orientation IMPORTANT: Top view of unit is shown. 1. Front of unit 2. Right side of unit 3. Rear of unit 4. Left side of unit About This Manual This manual contains information for the proper use of this machine. See the beige Operation Overview pages for basic operating procedures. Cross references such as “See page 50” will direct you to detailed procedures.
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Overview - 6 JT20 Operator’s Manual About This Manual CMW®
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JT20 Operator’s Manual Foreword - 7 Foreword This manual is an important part of your equipment. It provides safety information and operation instructions to help you use and maintain your Ditch Witch® equipment. Read this manual before using your equipment. Keep it with the equipment at all times for future reference. If you sell your equipment, be sure to give this manual to the new owner. If you need a replacement copy, contact your Ditch Witch dealer.
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JT20 Operator’s Manual Foreword - 8 JT20 Operator’s Manual Issue number 1.0/OM-5/13 Part number 053-2633 Copyright 2013 by The Charles Machine Works, Inc. , Ditch Witch, CMW, Jet Trac, Fluid Miser, and Power Pipe are registered trademarks of The Charles Machine Works, Inc. This product is covered by one or more of the following patents: U.S.
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JT20 Operator’s Manual Contents - 9 Contents Overview 1 machine serial number, information about the type of work this machine is designed to perform, basic machine components, and how to use this manual Foreword 7 part number, revision level, and publication date of this manual, and factory contact information Safety 11 machine safety alerts and emergency procedures Controls 25 machine controls, gauges, and indicators and how to use them Operation Overview 21 an overview for completing a jo
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Contents - 10 JT20 Operator’s Manual Specifications 185 machine specifications including weights, measurements, power ratings, and fluid capacities Support 189 the warranty policy for this machine, and procedures for obtaining warranty consideration and training Service Record a record of major service performed on the machine CMW® 193
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JT20 Operator’s Manual Safety - 11 Safety Chapter Contents Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Safety Alert Classifications . . . . . . . . . . . . . . . . . . 13 Safety Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Emergency Procedures . . . . . . . . . . . . . . . . . . . . . 17 • Electric Strike Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 • If an Electric Line is Damaged . . . . . . . . . . . .
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Safety - 12 JT20 Operator’s Manual Guidelines Guidelines Follow these guidelines before operating any jobsite equipment: • Complete proper training and read operator’s manual before using equipment. • Contact your local One-Call (811 in USA) or the One-Call referral number (888-258-0808 in USA and Canada) to have underground utilities located before digging. Also contact any utilities that do not participate in the One-Call service.
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JT20 Operator’s Manual Safety - 13 Safety Alert Classifications Safety Alert Classifications These classifications and the icons defined on the following pages work together to alert you to situations which could be harmful to you, jobsite bystanders or your equipment. When you see these words and icons in the book or on the machine, carefully read and follow all instructions. YOUR SAFETY IS AT STAKE. Watch for the three safety alert levels: DANGER, WARNING and CAUTION. Learn what each level means.
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JT20 Operator’s Manual Safety - 14 Safety Alerts Safety Alerts Turning shaft will kill you or crush arm or leg. Stay away. Electric shock. Contacting electric lines will cause death or serious injury. Know location of lines and stay away. Moving tools will kill or injure. Shut off drill string power when anyone can be struck by moving or thrown tools. Never use pipe wrenches on drill string. Jobsite hazards could cause death or serious injury. Use correct equipment and work methods.
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JT20 Operator’s Manual Safety - 15 Safety Alerts Improper control function could cause death or serious injury. If control does not work as described in instructions, stop machine and have it serviced. Looking into fiber optic cable could result in permanent vision damage. Do not look into ends of fiber optic or unidentified cable. Pressurized fluid or air could pierce skin and cause injury or death. Stay away. Fire or explosion possible. Fumes could ignite and cause burns.
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JT20 Operator’s Manual Safety - 16 Safety Alerts Hot pressurized cooling system fluid could cause serious burns. Allow to cool before servicing. Flying objects may cause injury. Wear hard hat and safety glasses. Hot parts may cause burns. Do not touch until cool. Exposure to high noise levels may cause hearing loss. Wear hearing protection. Fall possible. Slips or trips may result in injury. Keep area clean. Battery acid may cause burns. Avoid contact.
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JT20 Operator’s Manual Safety - 17 Emergency Procedures Emergency Procedures Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. Before operating any equipment, review emergency procedures and check that all safety precautions have been taken. EMERGENCY SHUTDOWN - Turn ignition switch to stop position or push remote engine stop button (if equipped). Electric Strike Description Electric shock.
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Safety - 18 JT20 Operator’s Manual Emergency Procedures If an Electric Line is Damaged If you suspect an electric line has been damaged and you are on drilling unit or bonded equipment, DO NOT MOVE. Remain on drilling machine and take the following actions. The order and degree of action will depend on the situation. • Warn people nearby that an electric strike has occurred. • Have someone contact electric company. • Reverse drilling direction and try to break contact.
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JT20 Operator’s Manual Safety - 19 Emergency Procedures If a Gas Line is Damaged Fire or explosion possible. Fumes could ignite and cause burns. No smoking, no flame, no spark. Explosion possible. Serious injury or equipment damage could occur. Follow directions carefully. If you suspect a gas line has been damaged, take the following actions. The order and degree of action will depend on the situation. • Immediately shut off engine(s), if this can be done safely and quickly.
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Safety - 20 JT20 Operator’s Manual Emergency Procedures If a Fiber Optic Cable is Damaged Do not look into cut ends of fiber optic or unidentified cable. Vision damage can occur. If Machine Catches on Fire Perform emergency shutdown procedure and then take the following actions. The order and degree of action will depend on the situation. • Immediately move battery disconnect switch (if equipped and accessible) to disconnect position.
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JT20 Operator’s Manual Operation Overview - 21 Operation Overview Chapter Contents Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Setting Up at Jobsite . . . . . . . . . . . . . . . . . . . . . . . 22 Drilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Backreaming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Leaving Jobsite. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Storing Equipment . . . . . . . . . . . . . .
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Operation Overview - 22 JT20 Operator’s Manual Planning Planning 1. Gather information about jobsite. See page 61. 2. Inspect jobsite. See page 62. 3. Classify jobsite. See page 64. 4. Plan bore path. See page 66. 5. Check supplies and prepare equipment. See page 72. 6. Load equipment. See page 80. Setting Up at Jobsite 1. Prepare jobsite. See page 71. 2. Unload drilling unit from trailer. See page 83. 3. Assemble drill string. See page 93. 4. Position drilling unit and drill frame. See page 89. 5.
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JT20 Operator’s Manual Operation Overview - 23 Drilling Drilling 1. Start system. See page 90. 2. Engage tracker control if desired. See page 123. 3. Drill first pipe. See page 95. 4. Record bore path. See page 102. 5. Enable automated pipeloader system. See page 95. 6. Add pipe. See page 96. 7. Drill remaining pipes in pipe box. • Correct direction. See page 98. • Engage cruise control. See page 142. • Shift pipe box. See page 137. 8.
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Operation Overview - 24 JT20 Operator’s Manual Backreaming Backreaming 1. Assemble backream string. See page 104. 2. Start drilling unit and adjust throttle.See page 76. 3. Set drilling fluid flow. Check that fluid flows through all nozzles. See page 119. 4. Remove pipe from bore. See page 105. 5. Remove up to a single column of drill pipe from full box (see page 128) to complete backream. 6. Remove pullback device. See page 107. Backreaming Tips • Plan backreaming job before drilling.
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JT20 Operator’s Manual Controls - 25 Controls Chapter Contents Set-Up Console . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Tethered Ground Drive Controller . . . . . . . . . . . . 29 Left Control Console . . . . . . . . . . . . . . . . . . . . . . . 31 • Engine Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 • Pipeloading controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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JT20 Operator’s Manual Controls - 26 Set-Up Console Set-Up Console j38om039w.eps 9 1. Tracker control key 6. Engine shutdown override switch 2. Cold start wait indicator 7. Right stabilizer control 3. Ignition switch 8. Frame tilt control 4. Left track switch 9. Left stabilizer control 5. Right track switch Item Description Notes 1. Tracker control key To allow tracker operator to stop thrust and rotation, move key to enable position (up).
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JT20 Operator’s Manual Controls - 27 Set-Up Console Item Description 2. Cold start wait indicator Lights when intake air preheater is operating. Notes Wait until light goes off before starting engine. 3. Ignition switch To start engine, insert key and turn clockwise. To stop engine, turn key counterclockwise. 4. Left track switch To move forward, press top. Restart engine with ignition switch after it has been turned off with remote engine stop switch.
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JT20 Operator’s Manual Controls - 28 Set-Up Console Item Description Notes 7. Right stabilizer control To raise, pull up. Lower left and right stabilizers to the ground to stabilize unit and then adjust for side-to-side stability. After unit is level, adjust for entry angle. To lower, push down. 8. Frame tilt control To raise front end of drill frame, pull up. To lower front end of drill frame, push down. 9. Left stabilizer control To raise, pull up. To lower, push down.
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JT20 Operator’s Manual Controls - 29 Tethered Ground Drive Controller Tethered Ground Drive Controller 1 5 2 4 3 j10om016h.eps 1. Speed/direction control 4. Operator presence switch 2. Power mode switch 5. Throttle switch 3. Remote engine stop Item Description Notes 1. Speed/direction control To move forward, push. Operator presence switch must be pressed and operator seat must be empty for control to work. To move backward, pull. To steer, move left or right. c00ic145h.
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JT20 Operator’s Manual Controls - 30 Tethered Ground Drive Controller Item Description 2. Power mode switch To select normal driving mode (high), push. Notes To select loading and unloading mode (low), pull. To disable ground drive, return to center. c00ic146h.eps 3. Remote engine stop To stop engine, press red button. 4. Operator presence switch To operate ground drive with tethered controller, press. To restart engine, turn ignition switch off and then back on. To disable controller, release.
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JT20 Operator’s Manual Controls - 31 Left Control Console Left Control Console Engine Display 0 :00 :00 AM/PM R F R j38om048w.eps Item Description Tachometer Displays engine speed. Fuel gauge Displays amount of fuel remaining in tank. Notes See “Approved Fuel” on page 202. c00ic003w.
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JT20 Operator’s Manual Controls - 32 Left Control Console Item Description Notes Voltmeter display Shows system voltage. Normal voltage is 13-14V with engine running. c00ic008w.eps Hour meter Displays number of hours engine has been running. 0.0 H c00ic020w.eps Engine temperature indicator Lights when engine coolant temperature is too high. Normal coolant temperature is 160230°F (71-110°C). c00ic004w.eps Engine oil pressure gauge Lights when engine oil pressure is too low.
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JT20 Operator’s Manual Controls - 33 Left Control Console Item Description Notes Sound indicator Indicates if notification alert sound is off or on. Use soft key directly below icon to toggle sound on or off. c00ic034w.eps Main menu icon Use soft key directly below icon to access main menu. c00ic031w.eps Hydraulic fluid temperature Lights when hydraulic fluid temperature is too high. c00ic037t.eps Hydraulic fluid filter indicator Lights when hydraulic filter is restricted.
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JT20 Operator’s Manual Controls - 34 Left Control Console Item Description Drill / Drive / Carve mode indicator Shows if unit is set to drill mode, drive mode, or carve mode. c00ic033w.eps Front wrench status indicator If front wrench is closed, light should be on. If front wrench is open, light should be off. Pipe lift status indicator If pipe lifter is lifted fully and lift pressure switch is engaged, light should be on. If pipe lift pressure switch is not engaged, light should be off.
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JT20 Operator’s Manual Controls - 35 Left Control Console Item Description Carriage home status indicator If carriage is in the home zone at either end of drill frame, light should be on. Notes If carriage is between the home zones at either end of drill frame, light should be off. Rear stop status indicator If carriage is at very back of drill frame, light should be on. If carriage is away from very back of drill frame, light should be off. Pipe box status indicator R c00ic036w.
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JT20 Operator’s Manual Controls - 36 Left Control Console Engine Display Main Menu IMPORTANT: Soft key commands change with each menu screen and are displayed next to the key. Item Description Notes System settings key Press to select system settings menu. System settings menu displays information about the system. Diagnostic information is only available to dealer technicians. User settings key Press to select user settings menu.
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JT20 Operator’s Manual Controls - 37 Left Control Console Pipeloading Controls 2 3 4 1 5 10 9 8 7 6 j38om001w.eps 1. Add pipe/manual/remove pipe switch 6. Pipe lift switch 2. Set/Resume switch 7. Pipe shuttle switch 3. Pipe box switch 8. Two-speed rotation switch 4. Resume switch 9. Pipe gripper switch 5. Wrench control 10.
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JT20 Operator’s Manual Controls - 38 Left Control Console Item Description Notes 1. Add pipe/manual/ remove pipe switch To select “add pipe” automated pipeloader function, press top. See “Add Pipe” on page 96. To use manual pipeloader controls, move to center. 2. Set/Resume switch RESUME SET / / To select “remove pipe” automated pipeloader function, press bottom. See “Remove Pipe” on page 105. To resume operation or increase operation levels, press top. See “Cruise Control” on page 142.
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JT20 Operator’s Manual Controls - 39 Left Control Console Item Description 5. Wrench control To clamp front wrench, move to right. Notes To unclamp front wrench, move to left. To clamp and rotate rear (rotating) wrench, push. To unclamp rear (rotating) wrench, pull. 6. Pipe lift switch To raise, press top. To lower, press bottom. 7. Pipe shuttle switch To move toward pipe box, press top. To move toward spindle, press bottom. 8.
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JT20 Operator’s Manual Controls - 40 Left Control Console Item Description 9. Pipe gripper switch To close, press top. To open, press bottom. 10. Pipe lubricator switch c00ic023w.eps CMW® To apply joint compound to threads, press forward.
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JT20 Operator’s Manual Controls - 41 Left Control Console Drilling/Operation Controls 2 3 4 5 6 1 7 8 11 j38om002 w.eps 10 9 1. Engine throttle switch 7. Remote engine start switch 2. Drilling fluid pressure gauge 8. EDT diagnostic port 3. Thrust pressure gauge 9. Console/Work light switch 4. Rotation pressure gauge 10. Fluid pump speed switch 5. AutoCarve switch 11. Fluid pump indicator 6.
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JT20 Operator’s Manual Controls - 42 Left Control Console Item Description Notes 1. Engine throttle switch To increase speed, press top. Return switch to center when desired speed is reached. Autothrottle mode slows the engine to low throttle after 15 seconds of inactivity involving thrust, rotation, drilling fluid flow, or pipeloader functions. To return to high speed, activate thrust, rotation, drilling fluid, or an add/remove cycle.
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JT20 Operator’s Manual Controls - 43 Left Control Console Item Description Notes 5. AutoCarve switch To enable autocarve, press top. Two-speed thrust is not allowed in AutoCarve mode. To deactivate autocarve, press bottom. c00ic608h.eps 6. Carve window control To increase carve window range, turn clockwise. See “Use AutoCarve” on page 100. To decrease carve window range, turn counterclockwise. c00ic609h.eps 7. Remote engine start switch To start engine from operator’s station, push button.
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JT20 Operator’s Manual Controls - 44 Left Control Console Item Description Notes 11. Fluid flow control To increase flow, turn clockwise. High speed delivers more flow at lower pressure. To decrease flow, turn counterclockwise. Low speed delivers less flow at higher pressure. To stop flow, turn all the way counterclockwise.
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JT20 Operator’s Manual Controls - 45 Unit Status Indicators Unit Status Indicators j38om003w.eps 1. Diagnostic light (red) 2. Control cycle light (green) Item Description 1. Diagnostic light (red) Alerts operator that a diagnostic code has been triggered. Notes If a non-essential diagnostic code is recorded, light flashes on and off for 10 seconds. If an essential diagnostic code is recorded, light flashes on for three seconds and off for half a second. 2.
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JT20 Operator’s Manual Controls - 46 Right Control Console Right Control Console 3 4 5 2 1 j38om004w.eps 1. Drilling fluid pump switch 4. Drilling fluid quick fill switch 2. Dual speed carriage control 5. Remote engine stop switch 3. Carriage control Item Description 1. Drilling fluid pump switch To turn on, press once. To turn off, press once.
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JT20 Operator’s Manual Controls - 47 Right Control Console Item Description Notes 2. Dual speed carriage control To engage high carriage travel speed, push and hold. Use during bore or pullback when no pipe is in spindle to save time. To return to normal carriage speed, release. NOTICE: Overriding assisted makeup mode puts pipe threads in jeopardy. If frequent overriding is necessary, see your Ditch Witch® dealer for pipeloader adjustment. To override assisted makeup mode, push and hold. 3.
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JT20 Operator’s Manual Controls - 48 Anchoring System Console Anchoring System Console 1 2 3 4 j10om015h.eps 1. Left rotation control 3. Right rotation control 2. Left thrust control 4. Right thrust control Item Description Notes 1. Left rotation control To drive anchor, push down. Stand on platform when operating anchor controls. To remove anchor, pull up.
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JT20 Operator’s Manual Controls - 49 Anchoring System Console Item Description Notes 2. Left thrust control To move anchor down, push down. Stand on platform when operating anchor controls. To move anchor up, pull up. 3. Right rotation control To drive anchor, push down. Stand on platform when operating anchor controls. To remove anchor, pull up. 4. Right thrust control To move anchor down, push down. Stand on platform when operating anchor controls. To move anchor up, pull up.
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JT20 Operator’s Manual Controls - 50 Seat/Armrest Seat/Armrest 1 3 2 j38om005w.eps 1. Armrest adjustment 3. Seat slide control 2. Seat recline control Item Description 1. Armrest adjustment To adjust armrest position, unscrew knob, move armrest to new position, and screw knob in.
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JT20 Operator’s Manual Controls - 51 Seat/Armrest Item Description 2. Seat recline control To recline or raise seatback, lift. Notes To lock seatback in position, release. 3. Seat slide control To slide forward or backward, move left. To lock seat in position, move right.
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JT20 Operator’s Manual Controls - 52 Battery Battery 1 j38om006w.eps 1. Battery disconnect switch Item Description 1. Battery disconnect switch To connect, move clockwise. To disconnect, move counterclockwise.
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JT20 Operator’s Manual Controls - 53 Engine Compartment Controls Engine Compartment Controls 1 2 4 5 3 j38om007w.eps 1. High/auto fan speed switch 4. Machine controller diagnostic port 2. Throttle switch 5. J1939 CAN diagnostic port, engine 3. Air filter restriction indicator Item Description Notes 1. High/auto fan speed switch For high speed, press top. If switch is on high speed, fan will run at full speed all the time. For automatic speed, press bottom.
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JT20 Operator’s Manual Controls - 54 Engine Compartment Controls Item Description Notes 2. Throttle switch To increase engine speed, press top. Use this switch only if throttle switch on console does not work. To decrease engine speed, press bottom. c00ic243h.eps 3. Air intake restriction indicator To further increase or decrease speed, press additional times (or hold until desired speed is reached). Shows air intake restriction.
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JT20 Operator’s Manual Controls - 55 ESID ESID 2 3 1 4 5 6 7 8 j07om042h.eps 1. Alphanumeric display 5. Current problem indicator 2. Strike indicator 6. OK indicator 3. Alarm interrupt button 7. Electrical power supply indicator 4. Voltage problem indicator 8. Self test button Item Description 1. Alphanumeric display Displays amount of current and voltage being detected as a percentage of strike condition.
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JT20 Operator’s Manual Controls - 56 ESID Item Description 3. Alarm interrupt button To turn off strike audio alarm at drilling unit, press. 4. Voltage problem indicator Blinking red light indicates a voltage sensor problem. See “Troubleshoot Strike System” on page 115. 5. Current problem indicator Blinking red light indicates a current sensor problem. See “Troubleshoot Strike System” on page 115. 6. OK indicator Green light means system self test detected no problems.
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JT20 Operator’s Manual Controls - 57 ESID Item Description 7. Electrical power supply indicator Green light means control box has sufficient electrical power for operation. Notes Strike system is ready to operate if OK indicator is also on. 8. Self test button To start manual self test, press. Checks all systems and circuits. To reset system after a strike has been detected, press. NOTICE: See “If an Electric Line is Damaged” on page 18.
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Controls - 58 JT20 Operator’s Manual ESID CMW®
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JT20 Operator’s Manual Prepare - 59 Prepare Chapter Contents Gather Information . . . . . . . . . . . . . . . . . . . . . . . . . 61 • Review Job Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 • Notify One-Call Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 • Examine Pullback Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 • Arrange for Traffic Control. . . . . . . . . . . . . . . . . .
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Prepare - 60 JT20 Operator’s Manual Prepare Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 • Mark Bore Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 • Prepare Entry Point. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Check Supplies and Prepare Equipment . . . . . . . 72 • Check Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 • Prepare Equipment .
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JT20 Operator’s Manual Prepare - 61 Gather Information Gather Information A successful job begins before the bore. The first step in planning is reviewing information already available about the job and jobsite. Review Job Plan Review blueprints or other plans and make sure you have taken bore enlargement during backreaming and pullback into account. Check for information about existing or planned structures, elevations, or proposed work that may be taking place at the same time.
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JT20 Operator’s Manual Prepare - 62 Inspect Site Inspect Site Inspect jobsite before transporting equipment. Check for the following: • overall grade or slope • changes in elevation such as hills or open trenches • obstacles such as buildings, railroad crossings, or streams • signs of utilities (See “Inspect Jobsite” on page 64.) • traffic • access • soil type and condition • water supply • sources of locator interference (rebar, railroad tracks, etc.
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JT20 Operator’s Manual Prepare - 63 Inspect Site Select Start and End Points Select one end to use as a starting point. Consider the following when selecting a starting point: Slope Fluid system should be parked on a level site. Consider how slope will affect drilling unit setup, bending pipe, and fluid flow out of hole. Traffic Vehicle and pedestrian traffic must be a safe distance from drilling equipment. Allow at least 10’ (3 m) buffer zone around equipment.
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Prepare - 64 JT20 Operator’s Manual Classify Jobsite Classify Jobsite Inspect Jobsite • Follow U.S. Department of Labor regulations on excavating and trenching (Part 1926, Subpart P) and other similar regulations. • Contact your local One-Call (811 in USA) or the One-Call referral number (888-258-0808 in USA and Canada) to have underground utilities located before digging. Also contact any utilities that do not participate in the One-Call service.
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JT20 Operator’s Manual Prepare - 65 Classify Jobsite Apply Precautions Once classified, precautions appropriate for jobsite must be taken. Electric Jobsite Precautions In addition to using a directional drilling system with an electric strike system, use one or both of these methods. • Expose line by careful hand digging or soft excavation. Use beacon to track bore path. • Have service shut down while work is in progress. Have electric company test lines before returning them to service.
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Prepare - 66 JT20 Operator’s Manual Plan Bore Path Plan Bore Path Plan the bore path, from entry to end, before drilling begins. The Ditch Witch® Trac Management System Plus is available for planning your bore path. This special software can be run in the field using a laptop computer equipped with Windows® 95 or higher operating system. See your Ditch Witch dealer for details.
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JT20 Operator’s Manual Prepare - 67 Plan Bore Path Recommended Bend Limits Ditch Witch® drill pipes are designed to bend slightly during operation. Slight bending allows for steering and correcting direction. Bending beyond recommended limits will cause damage that might not be visible. This damage adds up and will later lead to sudden drill pipe failure. IMPORTANT: Consider recommended bend limits during any bend, not just during bore entry.
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JT20 Operator’s Manual Prepare - 68 Plan Bore Path Pipe-By-Pipe Bend Limits Pipe (C) Forward (B) Deflection (A) Pipe (C) Forward (B) Deflection (A) 1 10 ft 0 in (3.0 m) 0 ft 5 in (0.1 m) 12 103 ft 8 in (31.6 m) 51 ft 7 in (15.7 m) 2 19 ft 11 in (6.1 m) 1 ft 6 in (0.5 m) 13 109 ft 5 in (33.3 m) 59 ft 9 in (18.2 m) 3 29 ft 9 in (9.1 m) 3 ft 5 in (1.1 m) 14 1114 ft 6 in (34.9 m) 68 ft 5 in (20.8 m) 4 39 ft 4 in (12.0 m) 6 ft 1 in (1.9 m) 15 118 ft 10 in (36.2 m) 77 ft 4 in (23.
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JT20 Operator’s Manual Prepare - 69 Plan Bore Path Entry Pitch Entry pitch is the slope of the drill frame compared with the slope of the ground. Determine entry pitch one of two ways: 1. With Pitch Beacon • Lay pitch beacon on the ground and read pitch. • Lay pitch beacon on drill frame and read pitch. • Subtract ground pitch from drilling unit pitch. 2. With Measurements • Measure from the ground to front end of drill frame (H1). • Measure from the ground to back end of frame (H2).
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JT20 Operator’s Manual Prepare - 70 Plan Bore Path Minimum Depth Because you must bend pipe gradually, entry pitch and bend limits determine how deep the pipe will be when it becomes horizontal. This is called the minimum depth. • To reduce minimum depth (D1), reduce entry pitch. This also decreases setback. • To increase minimum depth (D2), increase entry pitch. This also increases setback.
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JT20 Operator’s Manual Prepare - 71 Prepare Jobsite Prepare Jobsite Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. To help avoid injury, • If jobsite classification is in question or if the possibility of unmarked electric utilities exists, classify jobsite as electric. • Expose lines by hand before digging. Cutting high voltage cable can cause electrocution. • Remove all vegetation near operator’s station.
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JT20 Operator’s Manual Prepare - 72 Check Supplies and Prepare Equipment Check Supplies and Prepare Equipment Check Supplies • tracking system with spare batteries • beacons with new and spare batteries • two-way radios with new and spare batteries • quick wrench (see page 131) • transition sub • anchoring equipment and accessories • bits, screens, nozzles (see page 126) • adapters, pipe, beacon housings • marking flags or paint • water and additional hoses • fuel • drilling fluid
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JT20 Operator’s Manual Prepare - 73 Prepare Equipment Fluid Levels • fuel • hydraulic fluid • engine coolant • battery charge • engine oil Condition and Function • filters (air, oil, hydraulic) • fluid pump • couplers • tires and tracks • pumps and motors • drilling fluid mixer • hoses and valves • water tanks Assemble Accessories Fire Extinguisher If required, mount a fire extinguisher near the power unit but away from possible points of ignition.
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Prepare - 74 CMW® JT20 Operator’s Manual
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JT20 Operator’s Manual Drive - 75 Drive Chapter Contents Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Steer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Shut Down Unit . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Drive - 76 JT20 Operator’s Manual Start Unit Start Unit 1. Insert key. 2. Turn key clockwise. See page 23 for more information. 3. Run engine at low throttle for 5 minutes. Steer Unit To steer drilling unit while using tethered ground drive controller, follow instructions for type of steering desired. To steer while moving forward, push forward and then move to left or right. Drilling unit will gradually turn to left or right. To steer while moving backward, pull back and then move to left or right.
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JT20 Operator’s Manual Drive - 77 Shut Down Unit Shut Down Unit 1. Stop track movement. 2. Lower drill frame and stabilizers to the ground. IMPORTANT: If frame and stabilizers cannot be lowered, use cylinder locks or other suitable material to block the tracks and frame. Remove cylinder locks or chocks before driving unit. 3. Run engine at low throttle for 3 minutes to cool. 4. Turn key to the stop position. 5. Remove key.
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Drive - 78 JT20 Operator’s Manual Shut Down Unit CMW®
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JT20 Operator’s Manual Transport - 79 Transport Chapter Contents Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Haul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 • Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 • Tie Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 • Unload . . . . . . . . . . . . . . . . . . . . . . .
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JT20 Operator’s Manual Transport - 80 Lift Lift This machine is not configured for lifting. If the machine must be lifted, load machine into a container or onto a platform appropriate for lifting. See “Specifications” on page 185 for weight of machine. Haul Load Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. To help avoid injury, • Attach trailer to vehicle before loading or unloading. • Verify that trailer wheels are blocked.
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JT20 Operator’s Manual Transport - 81 Haul 5. Lower stabilizers to trailer floor. 6. Lower drill frame to trailer floor. 7. Stop engine when unit is safely positioned on trailer bed for proper tongue weight. 8. Attach tiedowns to drilling unit where indicated on page 81. Tie Down Points Tiedown points are identified by tiedown decals. Securing to trailer at other points is unsafe and can damage machinery. Procedure Incorrect procedures could result in death, injury, or property damage.
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Transport - 82 JT20 Operator’s Manual Haul Without Tiedown Kit Loop tiedowns around unit at tiedown points. Make sure tiedowns are tight before transporting.
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JT20 Operator’s Manual Transport - 83 Haul Unload Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. To help avoid injury: • Attach trailer to vehicle before loading or unloading. • Load and unload trailer on level ground. • Ensure trailer wheels are blocked. With Tiedown Kit 1. Lower ramps. 2. Remove tiedowns. 3. Start drilling unit engine. 4. Using tethered ground drive controller, pull power mode switch into low position. 5.
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JT20 Operator’s Manual Transport - 84 Tow Tow Under normal conditions, drilling unit should not be towed. If unit breaks down and towing is necessary: • Attach chains to indicated tow points facing towing vehicle. • Open bypass valves. • Open selector valves. • Tow for short distances at less than 1 mph (1.6 km/h). • Use maximum towing force of 1.5 times unit weight. To open bypass valves for towing, back out hex plugs (shown) three full revolutions.
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JT20 Operator’s Manual Transport - 85 Tow To open selector valves for towing, loosen jam nut and tighten valve screw (shown) until it is fully threaded. To close selector valves and return to normal operation, unthread valve screw and tighten jam nut. To attach chains to tow points, determine which points are facing towing vehicle. To attach chains to tow points, determine which points are facing towing vehicle.
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Transport - 86 JT20 Operator’s Manual Tow CMW®
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JT20 Operator’s Manual Conduct a Bore - 87 Conduct a Bore Chapter Contents Position Equipment . . . . . . . . . . . . . . . . . . . . . . . . 89 Connect Fluid System . . . . . . . . . . . . . . . . . . . . . . 89 Start System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Prime Drilling Fluid Pump . . . . . . . . . . . . . . . . . . . 90 Operate Carriage Control . . . . . . . . . . . . . . . . . . . 92 Clamp Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Conduct a Bore - 88 JT20 Operator’s Manual Use AutoCarve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Record Bore Path . . . . . . . . . . . . . . . . . . . . . . . . . 102 Surface Drill Head . . . . . . . . . . . . . . . . . . . . . . . . 102 Assemble Backream String . . . . . . . . . . . . . . . . 104 Remove Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 Remove Pullback Device . . . . . . . . . . . . . . . . . . .
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JT20 Operator’s Manual Conduct a Bore - 89 Position Equipment Position Equipment 1. Review bore plan and select drilling unit position and fluid unit position. 2. Move equipment into selected positions. Connect Fluid System Electric shock. Contacting electric lines will cause death or serious injury. Know location of lines and stay away. To help avoid injury, do not connect drilling unit to a public or private (business or home) water supply.
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JT20 Operator’s Manual Conduct a Bore - 90 Start System Start System 1. Start drilling unit and remote fluid unit. Allow both engines to warm up. IMPORTANT: Ensure that mixture of drilling fluid matches drilling conditions. See “Drilling Fluid” on page 119. 2. Enable tracker control mode if desired. See “Tracker Control” on page 123. 3. Press top of drilling unit throttle switch until engine is at full throttle. If you do not want to use autothrottle mode, return switch to center position.
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JT20 Operator’s Manual Conduct a Bore - 91 Operate Carriage Control Operate Carriage Control Drilling During normal drilling operation, the thrust/rotation joystick controls both operations and allows any combination of the two based on the position of the joystick: • Push joystick toward 1A for forward thrust with clockwise rotation. NOTICE: Counterclockwise rotation can unthread pipe in the ground. • Push joystick toward 2A for forward thrust with counterclockwise rotation.
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JT20 Operator’s Manual Conduct a Bore - 92 Clamp Pipe Clamp Pipe Turning shaft can kill you or crush arm or leg. Stay away. To help avoid injury: Only clamp pipe at reinforced end. Clamping anywhere else on the pipe will weaken the pipe. Pipe can later break, even when operating under normal loads. NOTICE: Wrenches can open after engine shutdown. Ensure that any downhole tool or pipe in tool joint vises is attached to spindle or removed before transport.
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JT20 Operator’s Manual Conduct a Bore - 93 Assemble Drill String Assemble Drill String 1. bit 2. beacon housing 3. adapter 4. collar 5. transition sub 6. JT20 drill pipe Prepare Beacon Housing 1. Select nozzles and bit. IMPORTANT: A variety of nozzles and bits are available to suit your particular job conditions. See + for more information, or contact your Ditch Witch® dealer. 2. Insert nozzle into beacon housing. 3. Attach bit to beacon housing. 4.
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Conduct a Bore - 94 JT20 Operator’s Manual Assemble Drill String Attach Beacon Housing Use machine torque to attach beacon housing. 1. Pull beacon housing into front wrench. 2. Close wrench. 3. Use machine torque to tighten joint fully. Connect Drill Pipe 1. Start drilling unit engine. 2. Align drill pipe in front wrench. 3. Clamp tool joint in front wrench. See “Clamp Pipe” on page 92. 4.
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JT20 Operator’s Manual Conduct a Bore - 95 Drill First Pipe Drill First Pipe Turning shaft can kill you or crush arm or leg. Stay away. To help avoid injury: • Keep everyone at least 10’ (3 m) away from turning drill string. • Push rod or pipe slowly. Forcing can bend string. Do not use bent rod or pipe. Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. 1. Turn on drilling fluid. 2.
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JT20 Operator’s Manual Conduct a Bore - 96 Add Pipe Add Pipe 1. Press top of drilling unit throttle switch until engine is at full throttle. 2. Enable automated pipeloader system (automated pipeloader control only). See “Enable Automated Pipeloader System” on page 95. 3. Break joint at saver sub. Manual Pipeloader Controls Automated Pipeloader Control • Clamp pipe joint. • Clamp pipe joint. • Locate drill head. • Locate drill head.
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JT20 Operator’s Manual Conduct a Bore - 97 Add Pipe 5. Connect pipe to saver sub: Manual Pipeloader Controls Automated Pipeloader Control IMPORTANT: Always rotate clockwise unless breaking pipe joint. Rotating counterclockwise will separate joints. IMPORTANT: Always rotate clockwise unless breaking pipe joint. Rotating counterclockwise will separate joints. • Move carriage forward until saver sub meets pipe. • Move carriage forward until saver sub meets pipe.
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Conduct a Bore - 98 JT20 Operator’s Manual Correct Direction Correct Direction Correcting direction is a skill operators gain with experience and knowledge of equipment and soil conditions. These instructions cover only basic procedures. For information about specific equipment or jobsites, contact your Ditch Witch® dealer. To track progress and make corrections, one crew member locates the drill head and sends instructions to the operator.
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JT20 Operator’s Manual Conduct a Bore - 99 Correct Direction Drill Head Position The drill head position is determined by reading beacon roll. Roll is displayed as a clock face position. 1. Read beacon roll. 2. Slowly rotate pipe until locator displays desired beacon roll. To change direction: 1. Rotate pipe to clock position you intend to travel. 2. Push pipe into ground. To move forward without changing direction: 1. Rotate pipe. 2. Push pipe into ground.
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JT20 Operator’s Manual Conduct a Bore - 100 Use AutoCarve Use AutoCarve AutoCarve helps the operator change direction when thrust stalls in difficult soil conditions. AutoCarve rotates the bit clockwise and counterclockwise to grind away soil, clearing a path to improve steering through tough formations. Movement Description alternating clockwise and counterclockwise rotation Enables the downhole tool to carve tough soil formations. Rotation speed can be adjusted during autocarving.
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JT20 Operator’s Manual Conduct a Bore - 101 Use AutoCarve Operation IMPORTANT: • 2-speed thrust is not allowed in AutoCarve mode. • AutoCarve mode is disabled while front wrench is closed. • Adding or removing pipe does not affect AutoCarve position. 1. Position downhole tool for carving. Rotate the toolhead to the desired position. 2. Turn on AutoCarve mode. Press top of AutoCarve switch. 3. Begin carving. Push joystick fully forward then release to neutral to start alternating rotation.
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JT20 Operator’s Manual Conduct a Bore - 102 Record Bore Path Record Bore Path Locate drill head every half-length of pipe. As the job is completed, record the actual data for each drill pipe. List pitch and depth of each joint and a brief description of the procedure. In addition, draw a simple sketch of the site and record depth and rough location of pullback. The Trac Management System Plus is also available for plotting and tracking your bore path.
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JT20 Operator’s Manual Conduct a Bore - 103 Backream Backream Sometimes it is necessary to enlarge the pilot hole to accommodate larger product. As a general rule, the final hole should be 1.5 times larger than the diameter of the product being installed. The number of passes needed depends on soil conditions. Do not try to increase hole size too much in one pass. Several passes using successively larger reamers will save wear on machine. Moving tools will kill or injure.
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Conduct a Bore - 104 JT20 Operator’s Manual Backream Assemble Backream String 1. Select backreaming devices. See “Backreamers” on page 126. 2. Determine fluid rate requirements and install appropriate nozzles to provide sufficient flow. See “Backream Fluid Requirements” on page 127 and “Nozzles” on page 124. 3. Attach backreamer to beacon housing if tracking backream. 4. Install beacon, following beacon instructions for: • battery replacement • beacon positioning 5. Install beacon housing lid.
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JT20 Operator’s Manual Conduct a Bore - 105 Remove Pipe Remove Pipe 1. Enable automated pipeloader system (automated pipeloader control only). 2. Stop carriage when pipes are aligned in wrenches. 3. Clamp pipe in front wrench. 4. Break front joint. • Turn rear wrench counterclockwise to break joint. • Disengage rear wrench and rotate wrench clockwise. 5. Grip pipe: Manual Pipeloader Controls Automated Pipeloader Control • Open grippers. • • Lift pipe off shuttles.
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JT20 Operator’s Manual Conduct a Bore - 106 Remove Pipe 9. Load pipe into pipe box: Manual Pipeloader Controls Automated Pipeloader Control • Move shuttle under pipe box to shuttle stop. • Press RESUME. Green control cycle light will come on. • Release grippers and raise lift arms to place pipe in box. • • Lube front threads. Shuttles will retract under edge of pipe box and then green control cycle light will flash. • Move carriage forward until it clears end of pipe box.
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JT20 Operator’s Manual Conduct a Bore - 107 Remove Pullback Device Remove Pullback Device The pullback device can be removed when the last pipe is on the frame. It can also be removed when a target pit along the bore path has been reached. Remaining pipe is then pulled back and removed. Moving tools will kill or injure. Shut off drill string power when anyone can be struck by moving or thrown tools. Never use pipe wrenches on drill string. 1.
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Conduct a Bore - 108 JT20 Operator’s Manual Remove Pullback Device CMW®
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JT20 Operator’s Manual Systems and Equipment - 109 Systems and Equipment Chapter Contents Anchor System . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 • Drive Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 • Remove Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Electric Strike System . . . . . . . . . . . . . . . . . . . . . 113 • FCC Statement . . . . . . . . . . . . . . . . . . . . . . . . . .
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Systems and Equipment - 110 JT20 Operator’s Manual Downhole Tools . . . . . . . . . . . . . . . . . . . . . . . . . . 126 • Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 • Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 • Beacon Housings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 • Backreamers . . . . . . . . . . . . . . . . . . . . . .
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JT20 Operator’s Manual Systems and Equipment - 111 Anchor System Anchor System Crushing weight. If load falls or moves, it could kill or crush you. Use proper procedures and equipment or stay away. To help avoid injury: • Drive anchors properly before drilling. • Stand on platform when operating anchor controls. • Wear high-top protective boots with legs of pants completely tucked inside. • Wear protective gloves.
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Systems and Equipment - 112 JT20 Operator’s Manual Anchor System Drive Anchors IMPORTANT: Carefully time anchor rotation with anchor movement. Properly driven anchors should not auger up soil. 1. Use anchor rotation and thrust controls to drive anchor into ground. NOTICE: Centering cap MUST be positioned in centering tube to prevent damage to anchor. 2. Carefully position centering cap (1) into centering tube (2) as anchor is being driven into ground. 3. Repeat process for other anchor. Remove Anchors 1.
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JT20 Operator’s Manual Systems and Equipment - 113 Electric Strike System Electric Strike System Any time you drill in an electric jobsite, electric strike system must be properly set up, tested, and used. You must wear protective boots and gloves meeting the following standards: • Boots must have high tops and meet the electric hazard protection requirements of ASTM F2413 or ASTM F1117 when tested at 14,000 volts. Tuck legs of pants completely inside boots.
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Systems and Equipment - 114 JT20 Operator’s Manual Electric Strike System Assemble Voltage Detector 1. Drive voltage stake into ground at least 6’ (2 m) away from any part of system. 2. Clip voltage limiter to voltage stake. Test Strike System If system fails any part of this test, see “Troubleshoot Strike System” on page 115 on the following page. Do not drill until test is completed successfully. 1. Turn on drilling unit. 2.
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JT20 Operator’s Manual Systems and Equipment - 115 Electric Strike System Troubleshoot Strike System When strike system detects a problem, an error code will be displayed. Anytime this happens, press self test button to retest. If error code is still displayed and does not appear in this chart, have control module checked or replaced. Other problem situations and their possible causes and solutions are listed in the chart below.
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JT20 Operator’s Manual Systems and Equipment - 116 Electric Strike System Problem Possible cause Possible solution Strobe light on drilling unit does not work during total test Improper connections with control module Check connections and wiring harness Defective strobe light 1. Disconnect strobe and connect to external 12V power source. 2. If strobe does not work, replace it.
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JT20 Operator’s Manual Systems and Equipment - 117 Electric Strike System Problem Possible cause Possible solution EV2 code displays and voltage problem indicator is on Improper connections with control module Check cable connection on control module Defective voltage limiter Have voltage limiter checked or replaced Defective control module Have control module checked or replaced Use Electric Strike Simulator Use the Electric Strike Simulator (p/n 259-506) to test voltage and current sensors on
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Systems and Equipment - 118 JT20 Operator’s Manual Electric Strike System Voltage Test 1. Place voltage limiter on something insulated from ground and drilling unit (such as dry board or tire), but near frame of drilling unit. 2. Clip one lead to frame. 3. Clip other lead to one voltage limiter mount. 4. Move simulator switch to "voltage" and press test button. 5. Watch screen and lights above display on strike system. • All lights should turn on. • Alarm and strobe should turn on.
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JT20 Operator’s Manual Systems and Equipment - 119 Drilling Fluid Drilling Fluid Improper handling or use of chemicals may result in illness, injury, or equipment damage. Follow instructions on labels and in material safety data sheets (MSDS). For productive drilling and equipment protection, use these recommended Baroid® products, available from your Ditch Witch® dealer.
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Systems and Equipment - 120 JT20 Operator’s Manual Drilling Fluid Bentonite Bentonite is a dry powder. When properly mixed with water, it forms a thin cake on bore walls, lubricating the bore, keeping it open, and holding fluid in the bore. Some things to remember when mixing bentonite: • Use clean water free of salt, calcium, or excessive chlorine. • Use water with pH level between 9 and 10. • Use water with hardness of less than 120 ppm. • Do not use bentonite containing sand.
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JT20 Operator’s Manual Systems and Equipment - 121 Drilling Fluid Basic Fluid Recipes Soil type Mixture/100 gal (378 L) of water Notes fine sand 35 lb (16 kg) Bore-Gel coarse sand 35 lb (16 kg) Bore-Gel .5 lb (225 g) No-Sag Add .5 lb (225 g) of Quik-Trol for additional filtrate control fine sand below water table 40 lb (18 kg) Bore-Gel .75 lb (340 g) Quik-Trol Add .5 - 1 gal (2-4 L) of Dinomul in high torque situations coarse sand below water table 40 lb (18 kg) Bore-Gel .
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Systems and Equipment - 122 JT20 Operator’s Manual Drilling Fluid Drilling Fluid Requirements 1. Determine drilling conditions and choose appropriate drilling fluid mix. 2. Estimate amount of supplies needed and check availability. • Drilling fluid • Water supply. If more water than can be carried with the unit will be needed, arrange to transport additional water. • Bentonite and/or polymer 3. Check water quality. • Use meter or pH test strips to test pH of water. If pH is below 9.
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JT20 Operator’s Manual Systems and Equipment - 123 Tracker Control Tracker Control Overview Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. This mode allows the operator of a Ditch Witch® tracking system to disable hydraulic power to drilling unit thrust and rotation. NOTICE: This mode does not disable thrust and rotation immediately. Functions are disabled within 16 seconds.
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Systems and Equipment - 124 JT20 Operator’s Manual Tracker Control Operation Enable Tracker Control 1. Start drilling unit. 2. Ensure that tracking unit is paired to tracking display and enable tracker control. See tracking system operator’s manual for instructions. 3. Remove tracker control key (shown) from set-up console at rear of drilling unit. Keep in tracker operator’s possession. 4. Drill and track bore.
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JT20 Operator’s Manual Systems and Equipment - 125 Tracker Control Disable Thrust and Rotation 1. When drill head enters target pit or exits the ground, turn off tracker. After 8-16 seconds, green tracker control light, located on drilling unit anchoring console, will come on. Hydraulic power to thrust and rotation will be disabled. IMPORTANT: Tracker operator cannot disable thrust and rotation from tracker if tracker control key (shown) is installed in drilling unit and turned to the disable position.
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JT20 Operator’s Manual Systems and Equipment - 126 Downhole Tools Downhole Tools Nozzles Nozzles control fluid flow from the pipe to the bore. Select nozzles that will supply at least the amount of fluid per minute needed for the flow and pressure you will be using. A nozzle that will supply more fluid per minute is recommended. See your Ditch Witch® dealer for nozzle recommendations. Bits Selection These charts are meant as a guideline only. No one bit works well in all conditions.
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JT20 Operator’s Manual Systems and Equipment - 127 Downhole Tools Soil Description sandy soil sugar sand, blow sand, or other soils where sand is the predominant component soft soil sandy loam medium soil loams, loamy clays hard soil packed clays, gumbo, all compacted soils rocky soil chunk rock, glacial till, cobble, rip rap, gravel soft rock soft limestone, sandstone, shale, coral, caliche hard rock granite, schist, marble, hard limestone Installation Remove all paint from mating surfac
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JT20 Operator’s Manual Systems and Equipment - 128 Downhole Tools Backreamers A backreamer enlarges the hole as pipe is pulled back through the bore. No one backreamer works well in all conditions. These charts are meant as a guideline only. See your local Ditch Witch® dealer for soil conditions and backreamer recommendations for your area.
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JT20 Operator’s Manual Systems and Equipment - 129 Downhole Tools Backream Fluid Requirements Backreaming is only successful when enough fluid reaches the bore. The amount of fluid needed depends on size of bore and soil condition. Follow these steps to find the minimum amount of fluid needed in perfect conditions. IMPORTANT: Use more fluid than recommended or the backream might be dry and unsuccessful. Instructions Example 1. Find amount of fluid needed for your size of backreamer.
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JT20 Operator’s Manual Systems and Equipment - 130 Downhole Tools Backream Fluid Requirements Backreamer/product diameter Gal/ft L/m Backreamer/product diameter Gal/ft L/m .5 in 13 mm 0.01 0.13 13.5 in 343 mm 7.44 92.35 1 in 25 mm 0.04 0.51 14 in 356 mm 8.00 99.31 1.5 in 38 mm 0.09 1.14 14.5 in 368 mm 8.58 106.54 2 in 51 mm 0.16 2.03 15 in 381 mm 9.18 114.01 2.5 in 64 mm 0.25 3.17 15.5 in 394 mm 9.80 121.74 3 in 76 mm 0.37 4.56 16 in 406 mm 10.44 129.
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JT20 Operator’s Manual Systems and Equipment - 131 Quick Wrench Quick Wrench To attach or remove downhole tools, use quick wrench to join or break the joint. Moving tools will kill or injure. Shut off drill string power when anyone can be struck by moving or thrown tools. Never use pipe wrenches on drill string. IMPORTANT: Apply TJC to threads and hand-tighten joint before attaching quick wrench components to tighten joint. Attach quick wrench in either the join or break position.
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JT20 Operator’s Manual Systems and Equipment - 132 Quick Wrench To Join 1. Scribe straight line across joint on both sides of separating line (A). 2. Scribe second line (B) on moveable side of joint in the opposite direction of tightening action .25” (6 mm) away from first line. A B 3. Turn handle until second line (B) meets first (A). A B 4. Turn handle opposite direction two turns to relieve pressure. A 5. Remove quick wrench components. To Break A j07om071h.
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JT20 Operator’s Manual Systems and Equipment - 133 Drill Pipe Drill Pipe Perform Regular Drill Pipe Care Precondition New Pipe Repeat this procedure three times for each piece of pipe before it is used the first time: 1. Hand-lubricate entire surface of threads and shoulders of both ends of pipe with copper base tool joint compound. See page 159 for correct lubricant. 2. Join pipe and tighten joint. 3. Break joint. 4. Move pipe back to box.
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Systems and Equipment - 134 JT20 Operator’s Manual Drill Pipe Use Caps and Plugs Before transporting in dusty conditions or prolonged storage, install caps and plugs to male and female ends of pipe and to saver sub.
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JT20 Operator’s Manual Systems and Equipment - 135 Drill Pipe Use Drill Pipe Correctly Align the Joints Always carefully align the male and female ends of pipe before connecting them together. Poor alignment can damage the threads and destroy the usefulness of the joint. Clamp Pipe Correctly Clamp on pipe when joint is centered between wrenches. Clamp only on the tool joint of the drill pipe as shown.
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Systems and Equipment - 136 JT20 Operator’s Manual Drill Pipe Make Up and Break Out Joints Correctly This consists of two steps: • Make up and break out joints slowly. Do not ram pipes together during makeup or force them apart during breakout. Carefully time rotation with carriage travel speed, and always connect and disconnect joints slowly and deliberately. This will help prevent thread crossing, galling, and shoulder swelling. • Tighten joints fully.
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JT20 Operator’s Manual Systems and Equipment - 137 Pipeloader Pipeloader Shift Pipe Box IMPORTANT: Lift arms must be fully raised for pipe box to move. Drilling 1. Shift pipe box when both pipe box status lights are off. 2. Release pipe box switch when box hits mechanical stops, then move back to align mechanical pointer in center of cutout (shown) for new column. Backreaming 1. Shift pipe box when active column is full (8 pipes). 2.
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Systems and Equipment - 138 JT20 Operator’s Manual Pipeloader Correct Misaligned or Jammed Pipe One pipe box status light on and one light off indicates a misaligned or jammed pipe. Turn off engine and inspect pipe in active column. • If one end of a drill pipe is jammed and will not drop correctly from pipe box, inspect pipe box position.
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JT20 Operator’s Manual Systems and Equipment - 139 Pipeloader Add/Remove Single Pipe Load a single drill pipe or up to a whole column of drill pipe into an empty column of pipe box to finish bore without changing pipe boxes. Electric shock. Contacting electric lines will cause death or serious injury. Know location of lines and stay away. To help prevent injury: • Do not attempt to load and unload pipe while drilling or backreaming. Unprotected worker can be injured by electric strike.
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Systems and Equipment - 140 JT20 Operator’s Manual Pipeloader Add Single Pipe 1. Place grid mats on the ground on pipe box side of drilling unit. 2. Connect mats. 3. Connect bonding cable to drilling unit (shown in inset). 4. Position entire drill pipe box on mat (shown). 5. Ensure pipe box is positioned properly. 6. Move shuttles out fully. Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. 7.
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JT20 Operator’s Manual Systems and Equipment - 141 Pipeloader Remove Single Pipe Unload all drill pipe loaded with auxiliary pipe loaders. 1. Lift, rotate, and lock pipe positioning aid (3) into stowed position. 2. Ensure pipe box is positioned properly. 3. Move shuttles out fully. 4. Pull pin (2) on shuttle, rotate auxiliary pipe loader (1) down, and install pin. 5. Repeat process for other shuttle. 6. Raise pipe. 7. Move pipe to auxiliary pipe loaders. • Move shuttles in.
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Systems and Equipment - 142 JT20 Operator’s Manual Cruise Control Cruise Control During the bore, you can set the desired thrust, pullback, and rotation speeds to match ground conditions. Cruise control enables the unit to maintain these settings hands-free. You can engage, disengage, override, and resume these settings at any time. IMPORTANT: In order for cruise control to function, front wrench must be open and shuttles must be under pipe box.
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JT20 Operator’s Manual Systems and Equipment - 143 Cruise Control Override • To override thrust settings, move joystick out of neutral and beyond current setting. Unit will increase to new setting. • To return to previous setting, release joystick. Disengage To disengage cruise control, move joystick out of neutral and in opposite direction of carriage travel. Green control cycle light will go off. Resume 1. Position joystick out of neutral in previous direction of travel. RESUME / 2.
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Systems and Equipment - 144 JT20 Operator’s Manual Diagnostic Codes Diagnostic Codes The JT20 is equipped with two diagnostic systems: engine and machine. The engine diagnostic system detects critical and non-critical errors within the engine operating system and communicates fault codes on the engine display. The machine diagnostic system detects essential and non-essential errors within the automated machine control system.
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JT20 Operator’s Manual Systems and Equipment - 145 Diagnostic Codes Reading Machine Diagnostic Codes Use the red diagnostic light to learn the condition of the diagnostic system. Under normal operating conditions, the diagnostic light will light steadily for two seconds after ignition is turned on to indicate light is working. It will then go out and remain out unless a diagnostic code is recorded.
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Systems and Equipment - 146 JT20 Operator’s Manual Diagnostic Codes Diagnostic Code Interpretation Diagnostic codes are displayed through a series of light flashes and pauses. Count number of flashes and pauses to interpret code. Example: “Flash, flash, flash, pause, flash, flash, longer pause” represents code 32. Tips for interpreting codes: • In View All Codes mode, the green control cycle light will come on the first time the red diagnostic light flashes a code.
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JT20 Operator’s Manual Systems and Equipment - 147 Diagnostic Codes Machine Diagnostic Codes The following table lists the attributes of each diagnostic code. Information presented includes: code number, condition causing code to be sent, result, and level of severity.
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JT20 Operator’s Manual Systems and Equipment - 148 Diagnostic Codes Code Condition Result Severity 65 no continuity to thrust/right track neutral valve cruise control is blocked essential 71 no continuity to drive selector valve drive is blocked essential 111 no continuity to left track reverse solenoid drive is blocked essential 112 no continuity to right track forward solenoid drive is blocked essential 113 no continuity to right track reverse solenoid drive is blocked essential
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JT20 Operator’s Manual Systems and Equipment - 149 Diagnostic Codes Code Condition Result Severity 221 system voltage is below 12.
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Systems and Equipment - 150 JT20 Operator’s Manual Diagnostic Codes CMW®
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JT20 Operator’s Manual Complete the Job - 151 Complete the Job Chapter Contents Antifreeze Drilling Unit . . . . . . . . . . . . . . . . . . . . 152 • Add Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 • Reclaim Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 Rinse Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 154 Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Complete the Job - 152 JT20 Operator’s Manual Antifreeze Drilling Unit Antifreeze Drilling Unit Your drilling unit can be left overnight in freezing conditions by circulating a polypropylene-based antifreeze (p/n 265-644) through optional antifreeze system before shutdown. Add Antifreeze 1. Fill antifreeze tank with 3 gal (11 L) of approved antifreeze. 2. Move carriage to front of drill frame. 3. Position 3-gal (11-L) bucket under spindle. 4. Install plug at quick coupler for drilling fluid pump (shown).
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JT20 Operator’s Manual Complete the Job - 153 Antifreeze Drilling Unit Reclaim Antifreeze 1. Connect remote fluid system. See page 89. 2. Turn on remote fluid system engine. 3. Start drilling unit and run at low throttle. 4. Move carriage to front of drill frame. 5. Position 3-gal (11-L) bucket under spindle. 6. Turn drilling fluid pump on low speed. 7. Turn drilling fluid pump off when drilling fluid comes out of spindle. 8. Open hood and pour antifreeze into tank.
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JT20 Operator’s Manual Complete the Job - 154 Rinse Equipment Rinse Equipment Using Washwand Pressurized fluid or air could pierce skin and cause injury or death. Stay away. To help avoid injury: • Never use high flow when using washwand. • Prime the drilling fluid pump before operating washwand. Failure to prime the drilling fluid pump will cause flow fluctuations, which will make it difficult to control the washwand. For instructions, see “Prime Drilling Fluid Pump” on page 90.
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JT20 Operator’s Manual Service - 155 Service Chapter Contents Service Precautions . . . . . . . . . . . . . . . . . . . . . . . 157 • Welding Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 • Washing Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 • Working Under Drilling Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 Recommended Lubricants/Service Key . . . . . . 159 • Approved Fuel.
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JT20 Operator’s Manual Service - 156 Service Precautions Service Precautions Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. NOTICES: • Unless otherwise instructed, all service should be performed with engine off. • Refer to engine manufacturer’s manual for engine maintenance instructions. Welding Precaution Explosion possible. Serious injury or equipment damage could occur. Follow directions carefully.
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JT20 Operator’s Manual Service - 157 Service Precautions Working Under Drilling Unit Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away. Before working under area of drilling unit supported by a stabilizer, make sure drilling unit is parked on hard surface. 1. Remove cylinder locks from storage at rear of pipe box and place over extended cylinder rods (shown) with curved ends toward stabilizer shoes. 2.
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Service - 158 JT20 Operator’s Manual Service Precautions Opening/Closing Front Hood To open: 1. Unlock hood at handles (1, 2) if hood is locked. 2. Unlatch handles (1) and rotate handle (2) counterclockwise. 3. Grasp upper and lower (2, 4) handles. 4. Lift hood upward and outward. 5. Continue lifting hood and push inward until up-latch (5, below) engages. To close: 1. Disengage the up-latch (5) by holding it up as the hood is pulled outward using the lower handle (4). 2.
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JT20 Operator’s Manual Service - 159 Recommended Lubricants/Service Key Recommended Lubricants/Service Key Item Description DEO (Tier 4 Units) DEO (Tier 4i Units) Diesel engine oil meeting or exceeding Deutz specification DQC III- LA. NOTICE: This unit is shipped from the factory with API CJ-4 DEO meeting Deutz specification DQC II-LA. Change oil initially at 250 hours. • Engine must use low sulfated ash, phosphorous, and sulfur (low (SAPS) oil. • See viscosity chart.
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JT20 Operator’s Manual Service - 160 Recommended Lubricants/Service Key Item Description Change, replace, adjust, service or test Proper lubrication and maintenance protects Ditch Witch equipment from damage and failure. Service intervals listed are for minimum requirements. In extreme conditions, service machine more frequently. Use only recommended lubricants. Fill to capacities listed in “Fluid Capacities” on page 187.
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JT20 Operator’s Manual Service - 161 Startup/10 Hour Startup/10 Hour Task Notes Check fuel filter water separator Check air filter indicator and clean dust trap Check engine oil level DEO Check engine coolant level DEAC Check hydraulic hoses Check hydraulic fluid level THF Check fluid pump oil level NDO Test control switches Check pipe lube applicator Check pipe auto lubricator spray nozzle Check pipe auto lubricator TJC level TJC Check drilling fluid y-strainer Check Fuel Filter Water Separ
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JT20 Operator’s Manual Service - 162 Startup/10 Hour Check Air Filter Indicator and Clean Dust Trap Check air filter indicator (1) and inspect dust trap (2) for cracks every 10 hours. Change filter elements when indicator reaches the red zone. See “Change Air Filter” on page 182. 1 NOTICE: Only open the air filter canister when air restriction is indicated. Change the elements, do not attempt to clean them. • Compressed air or water may damage filter elements.
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JT20 Operator’s Manual Service - 163 Startup/10 Hour Check Hydraulic Hoses Fluid or air pressure could pierce skin and cause injury or death. Stay away. To help avoid injury: • Use a piece of cardboard or wood, rather than hands, to search for leaks. • Wear protective clothing, including gloves and eye protection. • Before disconnecting a hydraulic line, turn engine off and operate all controls to relieve pressure. • Lower, block, or support any raised component with a hoist.
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JT20 Operator’s Manual Service - 164 Startup/10 Hour Check Hydraulic Fluid Level 1 Check hydraulic fluid level before startup and every 10 hours of operation. Maintain fluid level at halfway point on sight glass (2), when engine is off and fluid is cool. Refill with THF at hydraulic fluid fill (1). 2 j38om012w.eps Check Fluid Pump Oil Level Check fluid pump oil level at fill plug (1) before startup and every 10 hours of operation. Maintain fluid level at fill plug. Add NDO at fill plug (1) as needed.
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JT20 Operator’s Manual Service - 165 Startup/10 Hour Check Pipe Auto Lubricator Spray Nozzle Check pipe auto lubricator spray nozzle before startup and every 10 hours of operation. Ensure that nozzle is free of obstructions and operates properly. Clean as needed. NOTICE: Ditch Witch® tool joint compound is specially formulated to work with Ditch Witch pipe lubrication system. Use of other tool joint compounds will clog system. See “Recommended Lubricants/Service Key” on page 159 for more information.
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JT20 Operator’s Manual Service - 166 Startup/10 Hour Clean Drilling Fluid Y-Strainer Clean drilling fluid y-strainer before startup and every 10 hours of operation. Ensure that strainer is free of debris. j38om017w.
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JT20 Operator’s Manual Service - 167 50 Hour 50 Hour Task Notes Change fluid pump oil Initial service, NDO Check radiator Change hydraulic filter Initial service Check ground drive gearbox oil level 2 gearboxes, MPL Check rotation gearbox oil level MPL Lube rotation gearbox sliding output shaft EPS Inspect thrust rollers Change Fluid Pump Oil (Initial Service) Change fluid pump oil after first 50 hours and every 1000 hours thereafter.
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JT20 Operator’s Manual Service - 168 50 Hour Check Radiator Check radiator for dirt, grass, and other debris every 50 hours. Check more often if operating in dusty or grassy conditions. Clean as needed. To clean: • Clean fins with compressed air or spray wash. • Open rear hood and spray through radiator toward engine. • If grease and oil are present on radiator, spray with solvent and allow to soak overnight. j38om019w.eps IMPORTANT: Be careful not to damage fins with high pressure air or water.
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JT20 Operator’s Manual Service - 169 50 Hour Check Ground Drive Gearbox Oil Level Check oil level in both ground drive gearboxes every 50 hours. To check: Open check plug (2). If oil does not come out, open fill plug (1) and add MPL until level with check plug (2). IMPORTANT: • Drilling unit must be on level ground for accurate reading. • Use helper to assist in positioning gearbox plugs for checking and adding oil. • Do not overfill. j38om021w.
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JT20 Operator’s Manual Service - 170 50 Hour Lube Rotation Gearbox Sliding Output Shaft Lube rotation gearbox sliding output shaft with EPS every 50 hours. To lube: • Stop engine and turn battery disconnect switch to the OFF position. • Clean exposed portion of sliding output shaft with pressure washer to remove grime. • Blow dry with compressed air. • Apply EPS spray lube to all exposed shaft surfaces while manually moving the shaft in and out.
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JT20 Operator’s Manual Service - 171 100 HOUR 100 HOUR Task Notes Initial oil change (Tier 4i units) If using fuel with sulphur content above 500 PPM Initial Engine Oil and Filter Change (Tier 4i units) Initial engine oil and filter change is 100 hours if fuel sulfur content is above 500 PPM. Otherwise initial oil change should be at 250 hours. See “Recommended Lubricants” for more information about DEO specifications. To change: 2 1 3 4 1. Extend drain tray (4). 2.
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JT20 Operator’s Manual Service - 172 250 Hour 250 Hour Task Notes Change engine oil and filter (Tier 4 final units) Inspect air intake system Engine Oil and Filter Change (Tier 4 final units) Regular engine oil and filter change is 250 hours See “Recommended Lubricants” for more information about DEO specifications. 2 To change: 1. Extend drain tray (4). 2. While oil is warm, remove drain plug (3). Drain oil, replace plug, and slide drain tray (4) into original location. 3.
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JT20 Operator’s Manual Service - 173 500 Hour 500 Hour Task Notes Change hydraulic fluid and filter Normal conditions Change fuel filter Check batteries Change Hydraulic Fluid and Filter (Normal Conditions) Change hydraulic main and charge filters every 500 hours. Change filter more often if indicated by filter indicator. j38om020w.eps Change Fuel Filters Replace fuel filters every 500 hours. See parts manual or contact your Ditch Witch® dealer for correct replacement filter. j38om026w.
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JT20 Operator’s Manual Service - 174 500 Hour Check Battery Check battery every 500 hours. Keep batteries clean and terminals free of corrosion. To clean: 1. Turn battery disconnect switch to the off position. 2. Ensure that no ignition sources are near batteries. 3. Loosen and remove battery cable clamps carefully, negative (-) cable first. 4. Clean cable clamps and terminals with wire brush or battery cleaning tool to remove dull glaze. j38om027w.eps 5. Check for signs of internal corrosion in cables.
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JT20 Operator’s Manual Service - 175 750 Hour 750 Hour Task Notes Change fluid pump oil NDO Change Fluid Pump Oil Change fluid pump oil after first 50 hours and every 750 hours thereafter. Drain at plug (2) and fill with NDO engine oil at plug (1). Maintain fluid level at fill plug. Capacity for pump is 1 qt (0.9 L). 1 2 j38om028w.
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JT20 Operator’s Manual Service - 176 1000 Hour 1000 Hour Task Notes Change ground drive gearbox oil 2 gearboxes, MPL Change rotation gearbox oil MPL Change Ground Drive Gearbox Oil Change oil in both ground drive gearboxes every 1000 hours. To change: Drain MPL at plug (3). Add MPL at plug (1) until level with check plug (2). IMPORTANT: • Drill unit must be parked on level surface for accurate reading. • Use helper to assist in positioning gearbox plugs for checking and adding oil.
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JT20 Operator’s Manual Service - 177 1000 Hour Lube Rotation Gearbox Internal Splines Lube rotation gearbox internal splines with EPG every 1000 hours. To lube: • Turn battery disconnect switch to the OFF position. • Clean rotation gearbox area to remove grime. • Disconnect hose and remove water swivel. • Using special socket, remove thrust locknut, tang lock washer, and nut. j38om046w.eps • Remove sliding shaft from front side of gearbox. Clean and dry all components.
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JT20 Operator’s Manual Service - 178 2000 Hour 2000 Hour Task Notes Change engine coolant DEAC Drain cooling system at drain (2) every two years or 2000 hours. Refill at fill (1) with approved coolant. 1 2 t37om042w.
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JT20 Operator’s Manual Service - 179 As Needed As Needed Task Notes Change pipe auto lubricator pail TJC Change hydraulic filter Any time system is opened Check pipeloader pads Check front pipe guide inserts Check fluid pump ball valve Check track tension and condition Change/Adjust engine drive belt Change air filter Check saver sub Change Auto Lubricator TJC Pail Check pipe auto lubricator TJC level and change pail as needed. To change pail: 1.
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JT20 Operator’s Manual Service - 180 As Needed Change Hydraulic Filters (Anytime System Opened) Change hydraulic filters anytime system is opened for repair. Change filter and refill with THF at hydraulic oil fill. j38om020w.eps Check Pipeloader Inserts Check pipeloader inserts at indicated areas for wear. Flip gripper inserts for longer wear, or replace as needed. See your Ditch Witch® dealer for replacement parts. 1. wear pad 2. shuttle wear pad 3. shuttle gripper pad 4.
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JT20 Operator’s Manual Service - 181 As Needed Check Front Pipe Guide Inserts Check front pipe guide inserts (3) for wear. Rotate inserts for longer wear, or replace as needed. See your Ditch Witch® dealer for replacement parts. To replace: 1. Remove lynch pins (1, one on each side). 2. Remove guide inserts (3). 3. Remove pin (2) and open pipe guide. 4. Remove guide inserts (3). 5. Replace in reverse order. j38om033w.eps Check Fluid Pump Ball Valve Check ball valve for leaks.
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JT20 Operator’s Manual Service - 182 As Needed Change/Adjust Drive Belt Change or adjust engine drive belt as needed. To adjust: 1. Turn off engine and remove key. 2. Apply moderate thumb pressure to belt between pulleys, as shown. 3. Belt is properly tensioned when deflection is about 3/8” (10 mm). 4. If needed, loosen alternator bolts and pull alternator out until correct tension is reached. 5. Tighten alternator bolts. j38om043w.
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JT20 Operator’s Manual Service - 183 As Needed Check Saver Sub Check saver sub and replace as needed. See your Ditch Witch dealer for replacement parts. To replace: 1. Remove eight bolts that attach saver sub to spindle. Do not remove indexing dowels from spindle. 2. Remove and replace o-ring, if necessary. Install in reverse order and torque eight bolts in a cross pattern to 47 ft•lb (64 N•m). Apply Loctite® 242 to bolts before installation. j38om049w.
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Service - 184 JT20 Operator’s Manual As Needed CMW®
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JT20 Operator’s Manual Specifications - 185 Specifications H W L j38om038w.eps Dimensions U.S. Metric L, overall machine length (per SAE J2022) 207 in 5.26 m W, overall machine width (per SAE J2022) 51.5 in 1.31 m H, overall machine height (per SAE J2022) 90 in 2.39 m Entry angle (per SAE J2022) 10-14° 10-14° Entry angle 18-24% 18-24% Angle of approach 18° 18° Angle of departure 18° 18° Operating weight (per SAE J2022) 11,890 lb 5394 kg Power Pipe U.S.
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Specifications - 186 JT20 Operator’s Manual Operational U.S. Metric Maximum spindle speed (per SAE J2022) 225 rpm 225 rpm Maximum spindle torque (per SAE J2022) 2200 ft•lb 2980N•m Thrust force (per SAE J2022) 17,000 lb 75.
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JT20 Operator’s Manual Specifications - 187 Drilling Fluid System (Onboard) U.S. Metric Maximum drilling fluid pressure (per SAE J2022) 1500 psi 103 bar Fluid Capacities U.S. Metric Fuel tank * 30 gal 114 L Hydraulic reservoir 19 gal 72 L Engine oil, including filter 8.5 qt 8L Cooling system 4.4 gal 17 L * Under normal operating conditions, a full tank of fuel will last 10 hours. Battery SAE reserve capacity 195 min, 12V, negative ground, SAE cold crank @ 0°F (-18°C), 950 amps.
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Specifications - 188 CMW® JT20 Operator’s Manual
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JT20 Operator’s Manual Support - 189 Procedure Support Procedure Notify your dealer immediately of any malfunction or failure of Ditch Witch® equipment. Always give model, serial number, and approximate date of your equipment purchase. This information should be recorded and placed on file by the owner at the time of purchase. Return damaged parts to dealer for inspection and warranty consideration if in warranty time frame.
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JT20 Operator’s Manual Warranty - 190 Warranty Ditch Witch® Equipment and Replacement Parts Limited Warranty Policy Subject to the limitation and exclusions herein, free replacement parts will be provided at any authorized Ditch Witch dealership for any Ditch Witch equipment or parts manufactured by The Charles Machine Works, Inc. (CMW) that fail due to a defect in material or workmanship within one (1) year of first commercial use (Exception: 2 years for all SK5 attachments).
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JT20 Operator’s Manual Service Record - 193 Service Record Service Performed Date Hours CMW®
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Service Record - 194 Service Performed CMW® JT20 Operator’s Manual Date Hours