Operation Manual MODELS MLT20DCA MLT20DCA6 dedicated light tower Revision #0 (01/18/13) To find the latest revision of this publication, visit our website at: www.multiquip.com THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
proposition 65 warning Diesel engine exhaust and some of page 2 — MLT20 sERIES LIGHT TOWER • operation manual — rev.
Reporting Safety Defects If you believe that your vehicle has a defect that could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addition to notifying Multiquip at 1-800-421-1244. If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a group of vehicles, it may order a recall and remedy campaign.
Table of Contents MLT20 Series Light Tower Proposition 65 Warning............................................ 2 Reporting Safety Defects.......................................... 3 Table Of Contents..................................................... 4 Safety Information............................................... 5-10 Specifications......................................................... 11 Dimensions............................................................. 12 General Information.................
Safety Information Do not operate or service the equipment before reading the entire manual. Safety precautions should be followed at all times when operating this equipment. Failure to read and understand the safety messages and operating instructions could result in injury to yourself and others.
Safety Information geneRaL saFeTY CauTIOn neveR operate this equipment without proper protective clothing, shatterproof glasses, respiratory protection, hearing protection, steel-toed boots and other protective devices required by the job or city and state regulations. neveR operate this equipment when not feeling well due to fatigue, illness or when under medication. neveR operate this equipment under the influence of drugs or alcohol.
Safety Information LIgHT TOWeR saFeTY DangeR neveR operate the equipment in an explosive atmosphere or near combustible materials. An explosion or fire could result causing severe bodily harm or even death. WaRnIng neveR disconnect any emergency or safety devices. These devices are intended for operator safety. Disconnection of these devices can cause severe injury, bodily harm or even death. Disconnection of any of these devices will void all warranties.
Safety Information TOWIng saFeTY CauTIOn Check with your local county or state safety towing regulations, in addition to meeting Department of Transportation (DOT) Safety Towing Regulations, before towing your light tower. In order to reduce the possibility of an accident while transporting the light tower on public roads, aLWaYs make sure the trailer that supports the light tower and the towing vehicle are mechanically sound and in good operating condition. aLWaYs shutdown engine before transporting.
Safety Information TRanspORTIng saFeTY If lifting through pockets, make sure forks of forklift are inserted in pockets as far as possible before lifting. CauTIOn Before lifting, make sure that light tower parts are not damaged and screws are not loosened or lost. aLWaYs make sure crane or lifting device has been properly secured to lifting hook of the equipment. neveR lift the equipment while engine is running. Make sure the tower is in the stowed position before lifting.
Safety Information eLeCTRICaL saFeTY DangeR . neveR operate light tower or handle any electrical equipment while standing in water, while barefoot, while hands are wet or in the rain. A dangerous electrical shock could occur, causing severe bodily harm or even death. aLWaYs make sure the area above the light tower is open and clear of overhead power lines and other obstructions. The tower extends in excess of 30 feet (9 meters).
SPECIFICATIONS Table 1. MLT20 Series Specifications Light Tower Specifications Weight (with genset/trailer) MLT20DCA MLT20DCA6 Lamps Lumens Light Color Trailer Specifications Trailer Model Gross Vehicle Weight Rating (GVWR) Gross Axle Weight Rating (GAWR) (ea.) Tire Size Tire Load Rating (ea.) Wheel Bolt Pattern Fuel Tank Capacity Generator/Engine Specifications With Fuel - 4,450 lb. (2,018 kg.) Without Fuel - 3,740 lb. (1,696 kg.
dimensions DEPLOYED POSITION C STOWED POSITION D E F B G A Figure 1. Dimensions Table 2. Dimensions Reference Letter Description Dimension A Length (Mast Stowed Position) 170 in. (431 cm.) B Length (Mast Deployed Position) 101 in. (256 cm.) C Max. Height (Mast Deployed Position) 31.5 ft. (9.6 m) D Height (Mast Stowed Position) 74 in. (187 cm.) E Ground Clearance (From Axle) 8 in. (20 cm.) F Width (Tow Ready) 51 in. (129 cm.) G Width (Outriggers Deployed) 109 in. (276 cm.
general information The Multiquip MLT20 Series Light Tower is a dedicated general purpose light tower engineered to provide dependable lighting for a wide range of applications. This includes lighting for construction sites, industrial locations, special events, and emergency conditions. Metal Halide Lamps The MLT20 Series Light Tower is available with 6 metal halide, 1000-watt lamps (MLT20DCA6) or with 4 metal halide, 1000-watt lamps (MLT20DCA).
components 16 3 2 9 4 1 5 5 8 6 7 17 13 19 15 10 14 12 18 18 11 Figure 2. Major Components (Control Panel Side) Figure 2 and Figure 3 show the location of the controls and components for the MLT20 Series light tower. The function of each control is described below. 1. Mast Rotation Locking Knob — Unscrew this knob to release mast for rotation. Tighten this knob to lock mast after it is set to the desired position. 6.
components 22 21 21 20 23 REAR VIEW FRONT VIEW Figure 3. Major Components (Front/Rear) 13. Tongue Jackstand — Use this jackstand to support the tongue when attaching the light tower to a towing vehicle. 14. Safety Chain — Always attach safety chain to the towing vehicle. Never tow the light tower with the safety chain unattached. 15. Ball Hitch Coupler — Attach this coupler to the towing vehicle. Use only the specified ball diameter as indicated on your coupler.
inspection before starting 1. Read all safety instructions at the beginning of manual. DANGER ALWAYS make sure the area above light tower is open and clear of overhead power lines and other obstructions. The tower extends in excess of 30 ft. (9 meters). Contact with overhead power lines or other obstructions could result in equipment damage, serious injury or death! 2. Clean the light tower, removing dirt and dust, particularly the engine cooling air inlet and air cleaner. 3.
inspection b. Locate the key slot A on each female connector as shown in Figure 5. MALE CONNECTOR FEMALE CONNECTOR KEY SLOT A KEY TAB B Figure 5. Female and Male Connector c. On the corresponding male connector, locate the key tab B as shown in Figure 5. d. Align the key tab B on the male connector with the key slot A on the female connector and press together until seated. e.
operation Starting the Engine NOTICE Refer to the accompanying DCA20SPXU2 generator operation and parts manual (Part Number 49840) for information on how to start the engine. PULL PIN TO RELEASE OUTRIGGER mast operation DANGER ALWAYS make sure the area above light tower is open and clear of overhead power lines and other obstructions. The tower extends in excess of 30 feet (9 meters).
operation MAST CRADLE SUPPORT CRADLE LOCK/RELEASE LEVER MAST ROTATION HANDLE (2) MAST LOCK HANDLE MAST ROTATION LOCKING KNOB MAST LOCK/RELEASE PIN Figure 7. Raising the Mast MLT20 SERIES LIGHT TOWER • operation manual — rev.
operation Raising the Mast Once the tower mast has been locked into its vertical position, the mast can now be raised. The tower allows the lamps to be extended upwards in excess of 30 feet. Refer to Figure 7 for location of components. 1. Turn the mast extension winch clockwise and observe that the mast begins to extend upwards. 2. Continue turning the winch in the clockwise direction until the desired height has been reached. 3. Release the winch. This winch is of the self-locking type.
operation 2. Adjust the Voltage Regulator Knob to 120VAC. Check the AC voltmeter for the correct reading. See Figure 9. 4. When the lamps turn on, check the AC voltmeter reading and adjust the Voltage Regulator knob, if necessary, to correct the voltage. 5. If any of the lamps do not turn on as they should, refer to the troubleshooting section of this manual. 6. Close all cabinet doors after desired lights are on.
maintenance GENERAL INSPECTION Prior to each use, the light tower should be cleaned and inspected. Check for loose, missing, or damaged nuts, bolts or other fasteners. Servicing the Mast Raise/Lower Cable System To replace any components in the mast raise/lower cable system, use the following steps (See Figure 11): generator/ENGINE MAINTENANCE Refer to the accompanying DCA20SPXU2 Operator and Parts Manual (Part Number 49840) for information on how to maintain the generator and engine.
maintenance Servicing the Mast Extension Cable System To replace the cable in the mast extension cable system, use the following steps (See Figure 12): CENTER MAST PULLEY LOWER MAST PULLEY CENTER MAST UPPER MAST LOWER MAST SHACKLE ROUTE TO HAND WINCH LOWER MAST Figure 12. Mast Extension Cable System 1. Lower the mast to the horizontal resting position. 2. Inspect the cable clamps, pulleys, and other components for worn or damaged parts.
maintenance — TRAILERS The following trailer maintenance guidelines are intended to assist the operator in preventive maintenance. Trailer Brakes 6. Replace the adjusting-hole cover. 7. Repeat the above procedure on all brakes. 8. Lower the trailer to the ground. Properly functioning brake shoes and drums are essential to ensure safety. The brakes should be inspected the first 200 miles of operation. This will allow the brake shoes and drums to seat properly.
maintenance — TRAILERS WARNING Failure to maintain proper fluid level in the actuator may result in loss of braking action which could cause severe property damage, injury or death. Periodically check the actuator mounting fasteners for damage or loosening. Inspect the actuator for worn or damaged parts. As you are towing your trailer, be aware of any changes in braking quality. This could be an early warning of brake or actuator malfunction and requires immediate attention.
maintenance — TRAILERS After removing the dust cap, cotter pin, spindle nut and spindle washer, remove the hub to inspect the bearings for wear and damage. Replace bearings that have flat spots on rollers, broken roller cages, rust or pitting. Always replace bearings and cups in sets. The inner and outer bearings are to be replaced at the same time. Replace seals that have nicks, tears or wear. Lubricate the bearings with a high quality EP-2 automotive wheel bearing grease.
safety guidelines — TRAILERS The following guidelines are intended to assist the operator in the operation and handling of a trailer. Shift your automatic transmission into a lower gear for city driving. Safety precautions should be followed at all times when operating a trailer. Failure to read, understand and follow the safety guidelines could result in injury to yourself and others. Loss of control of the trailer or tow vehicle can result in death or serious injury.
safety guidelines — TRAILERS DRIvIng COnDITIOns When towing a trailer, you will have decreased acceleration, increased stopping distance, and increased turning radius (which means you must make wider turns to keep from hitting curbs, vehicles, and anything else that is on the inside corner). In addition, you will need a longer distance to pass, due to slower acceleration and increased length. Be alert for slippery conditions.
safety guidelines — TRAILERS InOpeRaBLe BRaKes, LIgHTs OR MIRRORs Be sure that the brakes and all of the lights on your trailer are functioning properly before towing your trailer. Check the trailer taillights by turning on your tow vehicle headlights. Check the trailer brake lights by having someone step on the tow vehicle brake pedal while you look at trailer lights. Do the same thing to check the turn signal lights. See Trailer Wiring Diagram section in this manual.
safety guidelines — TRAILERS VI N TA G VIN TAG Figure B. VIN Tag Location The trailer VIN Tag contains the following critical safety information for the use of your trailer. To determine the “empty” or “net” weight of your trailer, weigh it on an axle scale. To find the weight of the trailer using an axle scale, you must know the axle weights of your tow vehicle without the trailer coupled.
safety guidelines — TRAILERS eMeRgenCY FLaRes anD TRIangLe ReFLeCTORs BaLL HITCH COupLeR It is wise to carry these warning devices even if you are not towing a trailer. It is particularly important to have these when towing a trailer because the hazard flashers of your towing vehicle will not operate for as long a period of time when the battery is running both the trailer lights and tow vehicle lights.
safety guidelines — TRAILERS or is worn, the trailer can come loose from the tow vehicle and may cause death or serious injury. the trailer tongue. Wood or concrete blocks may also be used. THE TOW VEHICLE, HITCH AND BALL MUST HAVE A RATED TOWING CAPACITY EQUAL TO OR GREATER THAN THE TRAILER gross vehicle Weight Rating (gvWR). IT IS ESSENTIAL THAT THE HITCH BALL BE OF THE SAME SIZE AS THE COUPLER.
safety guidelines — TRAILERS Breakaway Brake system NOTICE Overloading can damage the tongue jack. DO nOT use the tongue jack to raise the tow vehicle more than one inch. If the coupler cannot be secured to the hitch ball, do not tow the trailer. Call your dealer for assistance. Lower the trailer so that its entire tongue weight is held by the hitch and continue retracting the jack to its fully retracted position.
safety guidelines — TRAILERS Connecting Trailer Lights pInTLe HITCH COupLeR Connect the trailer lights to the tow vehicle’s electrical system using the electric connectors at the front of the trailer (tongue). Refer to the wiring diagram shown in the trailer wiring diagram section of this manual. Before towing the trailer check for the following: A pintle eye coupler (Figure G) connects to a pintle-hook hitch that is located on or under the rear bumper of the tow vehicle.
safety guidelines — TRAILERS the ball andcoupler system. All bent or broken coupler parts must be replaced before towing the trailer. THE TOW VEHICLE, PINTLE HITCH AND PINTLE COUPLER MUST HAVE A RATED TOWING CAPACITY EQUAL TO OR GREATER THAN THE TRAILER gross vehicle Weight Rating (gvWR). IT IS ESSENTIAL THAT THE PINTLE HITCH BE OF THE SAME SIZE AS THE PINTLE COUPLER. The coupler size and load rating (capacity) are marked on the coupler. Hitch capacity is marked on the hitch.
safety guidelines — TRAILERS TIRe saFeTY unsafe Tires, Lug nuts or Wheels Trailer tires and wheels are more likely to fail than car tires and wheels because they carry a heavier load. Therefore, it is essential to inspect the trailer tires before each tow. If a tire has a bald spot, bulge, cuts, is showing any cords, or is cracked, replace the tire before towing. If a tire has uneven tread wear, take the trailer to a dealer service center for diagnosis.
safety guidelines — TRAILERS There is a vehicle placard (Figure I) located in the same location as the certification label described above. This placard provides tire and loading information. In addition, this placard will show a statement regarding maximum cargo capacity. TIRE AND LOADING INFORMATION The weight of cargo should never exceed XXX kg. Or XXX lbs. TIRE FRONT REAR SPARE SIZE COLD TIRE PRESSURE SEE OWNER’S MANUAL FOR ADDITIONAL INFORMATION Figure I.
safety guidelines — TRAILERS Use the information contained in this section to make tire safety a regular part of your vehicle maintenance routine. Recognize that the time you spend is minimal compared with the inconvenience and safety consequences of a flat tire or other tire failure. TIRe FunDaMenTaLs Federal law requires tire manufacturers to place standardized information on the sidewall of all tires (Figure J).
safety guidelines — TRAILERS uniform Tire Quality grading standards (uTQgs) Treadwear number: This number indicates the tire’s wear rate. The higher the treadwear number is, the longer it should take for the tread to wear down. For example, a tire graded 400 should last twice as long as a tire graded 200. Traction Letter: This letter indicates a tire’s ability to stop on wet pavement. A higher graded tire should allow you to stop your car on wet roads in a shorter distance than a tire with a lower grade.
safety guidelines — TRAILERS Table B below will help pinpoint the causes and solutions of tire wear problems. Table B. Tire Wear Troubleshooting Wear pattern Cause solution Center Wear Over inflation. Adjust pressure to particular load per tire manufacturer. Edge Wear Under inflation. Adjust pressure to particular load per tire manufacturer. Side Wear Loss of camber or overloading. Make sure load does not exceed axle rating. Align wheels. Toe Wear Incorrect toe-in. Align wheels.
safety guidelines — TRAILERS Table C. Tire Torque Requirements Wheel size First pass FT-LBs second pass FT-LBs Third pass FT-LBs 12" 20-25 35-40 50-65 13" 20-25 35-40 50-65 14" 20-25 50-60 90-120 15" 20-25 50-60 90-120 16" 20-25 50-60 90-120 Replace any broken or burned-out lamps as necessary. Check the wire harness for cuts, fraying or other damage. If it needs replacing, contact your dealer. WaRnIng Improper operating taillights, stoplights and turn signals can cause collisions.
TROUBLESHOOTING Table 5. Lamp Troubleshooting Symptom Possible Cause Lamp Burned Out? Test the lamp in a fixture which is operating properly. Replace if necessary. Lamp Loose in Socket? Inspect lamp base to see if there is arcing at center contact button. Tighten lamp snugly. Check socket for damage. Replace if defective. Lamp Plugs Not Tight? Check plug and receptacle. Tighten if loose. Defective Ballast? Interchange ballast plugs in generator enclosure. If lamp starts, replace ballast.
TROUBLESHOOTING Table 5. Lamp Troubleshooting (continued) Symptom Possible Cause Solution Lamp starts slowly (ARC does not strike when switch is first turned on) Defective Lamp? Lamp may glow for extended period of time. Replace after checking voltage and ballast. Circuit breaker trips on lamp start-up Short Circuit or Ground? Check wiring against diagram. Check for shorts or ground. Normal Lamp Depreciation? Replace Lamp. Dirty Lamp or Fixture? Clean lamp and fixture.
TROUBLESHOOTING Lamp Troubleshooting Guide Use the following procedure and wiring diagrams on the next pages to determine which of the four lamps is not functioning: Connections 1. Make sure that lamp #1 power cable is plugged into the J1 connector on the T-Bar assembly. 2. Make sure that lamp #2 power cable is plugged into the J2 connector on the T-Bar assembly. 3. Make sure that lamp #3 power cable is plugged into the J3 connector on the T-Bar assembly. 4.
notes MLT20 SERIES LIGHT TOWER • operation manual — rev.
ELECTRONIC COMPONENT LOCATOR (mlt20dca) R S P Q J2 J1 J4 J3 LAMP 4 LAMP 3 LAMP 1 LAMP 2 A U O BLACK RED WHITE V O GREEN E C D B GREEN J RED V WHITE O BLACK U K L G F I H N NOTICE Reference MLT20DCA (4-lamp) wiring diagram on succeeding pages. page 46 — MLT20 sERIES LIGHT TOWER • operation manual — rev.
ELECTRONIC COMPONENT LOCATOR (mlt20dca6) V Y U T W X A1 A BLACK WHITE RED U O V GREEN G E C B F D GREEN RED V WHITE O BLACK U N O P Q R H I J K L M Z NOTICE Reference MLT20DCA6 (6-lamp) wiring diagram on succeeding pages. MLT20 SERIES LIGHT TOWER • operation manual — rev.
WIRING DIAGRAM (mlt20dca) OUTPUT TERMINAL PANEL REAR CONNECTIONS GROUND CONNECTION MUST BE USED AT ALL TIMES BLACK WHITE RED U O V GREEN A GREEN 14 AWG L1 NEU. L2 GND.
WIRING DIAGRAM (mlt20dca) T-BAR ASSEMBLY P/N 19954 J1 (LAMP 1) BLK J2 (LAMP 2) RED WHT Q P B A BLUE J4 (LAMP 4) YEL WHT R WHT S GRN GRN GRN A WHT J3 (LAMP 3) GRN GREEN 16 AWG BLK 14 AWG 120V IN BALLAST #1 (LAMP 1) F 7-WIRE COIL CORD P/N 29433 C1 24µF@480V CAPACITOR NEU. OUTPUT J 4 LAMP BALLAST ASSEMBLY P/N 49784 (MLT20DCA) RED 16 AWG 1 BLK 16 AWG R1 O C RED 14 AWG G 120V IN BALLAST #2 C2 24µF@480V CAPACITOR NOTES: NEU.
WIRING DIAGRAM (mlt20dca6) OUTPUT TERMINAL PANEL REAR CONNECTIONS GROUND CONNECTION NOTICE MUST BE USED AT ALL TIMES BLACK WHITE RED U O V Reference MLT20DCA6 (6-lamp) locator diagram on preceeding pages. GREEN A GREEN 14 AWG L1 NEU. L2 GND.
WIRING DIAGRAM (mlt20dca6) T-BAR ASSEMBLY P/N 49721 WHT J1 (LAMP 1) J2 (LAMP 2) WHT BLK B A WHT BLUE U V GRN GRN A WHT RED T J3 (LAMP 3) J4 (LAMP 4) YEL J5 (LAMP 5) WHT ORG W GRN PURPLE Y X GRN J6 (LAMP 6) GRN GRN GREEN 16 AWG BLK 14 AWG 120V IN BALLAST #1 (LAMP 1) NEU. H 10-WIRE COIL CORD P/N 49609 C1 24µF@480V CAPACITOR OUTPUT N RED 16 AWG 6 LAMP BALLAST ASSEMBLY P/N 49785 (MLT20DCA6) 1 BLK 16 AWG R1 A1 C RED 14 AWG I 120V IN BALLAST #2 NEU.
Operation Manual HERE’S HOW TO GET HELP PLEASE HAVE THE MODEL AND SERIAL NUMBER ON-HAND WHEN CALLING United StateS Multiquip Corporate Office 18910 Wilmington Ave. Carson, CA 90746 Contact: mq@multiquip.com MQ Parts Department Tel.
