PARTS AND OPERATION MANUAL MODEL ST-70 Structural Concrete Pump (Hatz Diesel Engine) Revision #4 (05/29/07) To find the latest revision of this publication, visit our website at: www.multiquip.com THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
Diesel engine exhaust and some of PAGE 2 — ST-70 — PARTS & OPERATION MANUAL — REV.
NOTE PAGE ST-70 — PARTS & OPERATION MANUAL — REV.
TABLE OF CONTENTS Here's How To Get Help .......................................... 3 Table Of Contents ................................................... 4 Parts Ordering Procedures ..................................... 5 ST-70 Specifications .......................................................... 6 Pump Warranty ....................................................... 7 Safety Instructions ............................................. 8-10 Important Hand Signals .......................................
www.multiquip.com Effective: January 1st, 2006 PARTS ORDERING PROCEDURES Ordering parts has never been easier! Choose from three easy options: Best Deal! Order via Internet (Dealers Only): If you have an MQ Account, to obtain a Username and Password, E-mail us at: parts@multiquip.com. Order parts on-line using Multiquip’s SmartEquip website! ■ View Parts Diagrams ■ Order Parts ■ Print Specification Information To obtain an MQ Account, contact your District Sales Manager for more information.
ST-70 SPECIFICATIONS PERFORMANCE Pumping Rate — Volume Output Maximum Aggregate Size U.S. 70 yd/hr.* 1 1/2" minus METRIC (54m/hr)* (38 mm) Verticle Pumping Height ................................................. 300 ft.* ..................................................................... (91m)* Horizontal Pumping Distance ......................................... 1200 ft.*................................................................... (366m)* Engine — Diesel .......................................
MAYCO PUMP WARRANTY Mechanical Drive Models Hydraulic Drive Models MAYCO PUMP, hereinafter referred to as “Manufacturer’, warrants each new Mayco Pump sold by the manufacturer to be free from defects in material and workmanship, under normal use and service, for a period of one year after the date of delivery to the original retail purchaser.
ST-70 — SAFETY INSTRUCTIONS READ THIS PARTS AND OPERATION MANUAL THOROUGHLY BEFORE USING THIS MACHINE. It describes the safe, proper and most efficient way to operate it. KNOW YOUR MACHINE! When operating concrete pumps the safety regulations of the responsible employers’ liability insurance company must be observed. The observation of these regulations shall be the responsibility of the contractor and operator.
ST-70 — SAFETY INSTRUCTIONS STABILIZER JACK PIPELINES Prior to jacking check the soil conditions. If necessary, enlarge the support foot area by placing square timbers underneath. PIPELINES AND CLAMPS MUST BE OF SUFFICIENT SIZE FOR THE PUMP’S CAPACITY. Keep a sufficient distance from excavations; slopes could break away because of support pressures. The pipeline connections must not be opened under working pressure. Before the pipeline is opened, pressure must be relieved by sucking back the concrete.
ST-70 — SAFETY INSTRUCTIONS MODEL ST-70 O. Never fill the fuel tank while the engine is running or hot. Avoid the possibility of spilled fuel which may cause a fire. THE OPERATOR IS IN COMPLETE CHARGE OF THE PUMP AND DELIVERY SYSTEM AND IS RESPONSIBLE FOR HIS/ HER OWN SAFETY AND TO WARN AND KEEP ALL OTHERS OUT OF DANGER. P. Always carry a fire extinguisher of adequate size and a first aid kit.
IMPORTANT HAND SIGNALS ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — GENERAL INFORMATION CONCRETE MIX DESIGN Mix design is most important to achieve maximum pumpability. Pumpability is affected by, among other factors, the type and gradation of aggregate used. Natural aggregates make a more workable mix and pump more readily than crushed aggregates. A blend of natural and crushed aggregates will produce a workable mix. The type and gradation of aggregates is equally important for workability as the size and percentage of coarse aggregates in the mix.
ST-70 — GENERAL INFORMATION REGIONAL DIFFERENCES In addition, the Mayco Structural Concrete ST-70 Pump can be used to pump a large aggregate hard rock as follows: Concrete is made by mixing locally available rock and sand with cement and water. For this reason there are great differences in the pumpability of concrete from one region of the country to another. 1. Pea rock (1/2" minus) pump with mixes being as low as 30% rock and 70% sand. (See page 30, for comments on cleaning the pump.
ST-70 — CONCRETE MIX INFORMATION Job Identification* _______________________________________ Date* ______________________________________ Architect* ______________________________________________ General Contractor* ___________________________ Structural Engineer* ______________________________________ Concrete by* ________________________________ THE PROPORTIONS SHOWN HERE ARE A RECOMMENDATION BASED ON TESTS OF SAMPLES RECEIVED BY THE LABORATORY.
ST-70 — CONCRETE MIX INFORMATION Job Identification* _______________________________________ Date* ______________________________________ Architect* ______________________________________________ General Contractor* ___________________________ Structural Engineer* _____________________________________ Concrete by* ________________________________ THE PROPORTIONS SHOWN HERE ARE A RECOMMENDATION BASED ON TESTS OF SAMPLES RECEIVED BY THE LABORATORY.
ST-70 — CONCRETE MIX INFORMATION Job Identification* _______________________________________ Date* ______________________________________ Architect* ______________________________________________ General Contractor* ___________________________ Structural Engineer* _____________________________________ Concrete by* ________________________________ THE PROPORTIONS SHOWN HERE ARE A RECOMMENDATION BASED ON TESTS OF SAMPLES RECEIVED BY THE LABORATORY.
ST-70 — CONCRETE MIX INFORMATION SIEVE ANALYSIS — CONCRETE SAND SIEVE SIZE ASTM C33 SPECS % PASS ACCUM SAMPLE #1 INDIV % RET #4 95-100 98 2 2 8 80-100 89 11 9 16 50-85 71 29 18 30 25-60 47 53 24 50 10-30 23 77 24 100 2-10 7 93 16 200 Fineness Modulus F.M. = 2.65 2.65 The sand content of pumpable concrete is very important. It is one of the two major ingredients that change due to regional location (the other is the rock or gravel).
SLUMP TEST PROCEDURE 1. To obtain a representative sample, take samples at three or more regular intervals throughout the discharge of the mixer or truck. DO NOT take samples at the beginning or end of the discharge. 2. Dampen the inside of the cone and place it on a smooth, moist, nonabsorbent, level surface large enough to accommodate both the slumped concrete and the slump cone. Stand on the “foot pieces” throughout the test procedure to hold the cone firmly in place. 3.
ST-70 — OPERATION (How it Works) The following is a brief explanation of how the concrete cylinders, hydraulic cylinders, shuttle tube, valves and hopper work in sequence to pump concrete. The hydraulic pressure is generated by a variable volume, pressure compensated, axial piston pump that is driven by a diesel engine. The hydraulic pressure is applied to one of the two hydraulic cylinders causing the hydraulic piston, which is connected to the concrete piston, to discharge concrete into the delivery line.
INITIAL START-UP PROCEDURE This section is intended to assist the operator with the initial start-up of the MAYCO ST-70 Concrete Pump. It is extremely important that this section be read carefully before attempting to use the pump in the field. Figure 1 illustrates the basic operating controls and indicators on the MAYCO ST-70 Concrete pump. Each of the items referenced will be discussed. The sequence will be as follows: 1.
INITIAL START-UP PROCEDURE Engine Oil 1. Pull the engine oil dipstick from the engine side panel as shown in Figure 2. ENGINE SIDE PANEL If the hydraulic oil level is low, remove the cap just above the oil level sight glass and add the correct amount of hydraulic oil to bring the hydraulic oil level to a normal safe operating level. (Use Shell oil Tellus 68 or Mobil oil DFE26) FUEL 3. Determine if engine fuel is low (Figure 5). If fuel level is low, remove the fuel filler cap and fill with diesel fuel.
INITIAL START-UP PROCEDURE D. Insert the cotter pin into handle tee bolt eye to lock the stabilizer stand. Emergency Stop Switch 5. Locate the Emergency Stop Switch (Figure 7) on the Hydraulic Pump Control Box. Use this switch in the event of a emergency. E ME 7. Observe that the Air Filter and Oil Pressure status indicator lights are ON (Figure 9). The Battery status indicator light should be OFF A. Turn the key to the START position and listen for the engine to start. B.
INITIAL START-UP PROCEDURE 9. Turn the Volume Control (Figure 11), lock nut counterclockwise (CCW) to release the volume control knob. 20 25 15 10 30 RPM X 100 5 3C VOLUME CONTROL LOCK NUT 0 35 TACH HOURS 0 0 0 0 4 8 40 1 10 3A Figure 13. Engine Tachometer VOLUME CONTROL CW CCW INCREASE DECREASE TURN CLOCKWISE TO INCREASE ENGINE SPEED Figure 11. Volume Control A. Use the volume control, to set the pump volume to approximately 10 strokes per minute.
INITIAL START-UP PROCEDURE A. While monitoring the tachometer, (Figure 13) turn the engine Throttle Control (Figure 14) clockwise until the engine speed reaches 2550 RPM (maximum speed). B. The Accumulator Pressure Gauge (Figure 16) should read approximately 1750 pounds per square inch (psi). 10 1500 00 12. The Pressure Test switch (Figure 18) is a self-diagnostic test switch, that when activated will test the pressure of the system.
INITIAL START-UP PROCEDURE C. Push the Hopper Remixer Control lever downward (Figure 19) and observe that the blades (Figure 20) inside the hopper are turning in a clockwise direction (forward). HAND HELD REMOTE UNIT 25 FT. CABLE BLADES CONTROL SWITCHES FORWARD (CW) REVERSE (CCW) Figure 22. Handheld Remote Cable Unit SHAFT ROTATION Figure 20. Hopper Remixer Blades (Rotation) 15. CYLINDER LUBRICATION BOX WARNING D.
ST-70 — OPERATING PROCEDURES Important Rules for the Setup and Operation of Mayco Model ST-70 Hydraulic Concrete Pump 1. The Mayco pump must be operated by experienced operators, who are qualified with the particular model being used, or students under the direct supervision of an experienced operator. The operator is in complete charge of the pump and delivery system. Know and warn all others of the DANGERS that are present when using, maintaining or being around this pump and delivery system.
ST-70 — OPERATING PROCEDURES 18 Priming the Pump and Delivery System with Slurry. 19. It is CRITICAL to the successful operation of a concrete pump that the manifold and all delivery hose, pipe and elbows are coated with a film of lubrication BEFORE you attempt to pump concrete. Failure to properly prepare the pump and system will result in a “dry pack” of concrete, blocking the shuttle valve tube or delivery line. 19.1 Stop the pump with a full hopper. 18.
ST-70 — OPERATING PROCEDURES 3. Damaged hoses with internal restrictions can cause blockages. 4. If a blockage occurs in the hose, STOP the pump, “walk the hose” until you find the point of trouble. (The hose will be soft immediately past the blockage.) Elevate the hose at that point with the blockage hanging down. Using a hammer, you can pound the down stream edge of the packed area until it free flows or shakes out of the hose. Pumping can now be resumed.
ST-70 — OPERATING PROCEDURES Chip the blockage out with the pry-bar. Flush the shuttle tube with water. Replace and seal the inspection cover plate on the shuttle tube. 7.5 Resume pumping. 8. The effects of heat and excessive time on concrete: Hot concrete, commonly referred to as a “hot load”, is concrete that has been in a redi-mix truck in excess of 2 to 3 hours. On a hot day, the amount of time is even less.
ST-70 — OPERATING PROCEDURES 14. All new pumps are ‘water pressure tested” at the factory This procedure permits a thorough inspection of entire drive system and valving under simulated full load conditions. The pump owner can do the same by making an adapter to couple to the end of the discharge cone: e.g., the use of a standard 2" pipe cap with a #/8" drilled hole in the center, screwed on to the end of hinged cone or reducer at the pump.
ST-70 — TOWING INFORMATION 1. Position actuator ball socket above 2" ball. WARNING: Use jack stand to lift tongue. Do NOT lift by hand as back injury could result. 5. To make sure that the actuator is securely latched onto the ball, extend the trailer tongue jack to the ground and lift the truck and trailer combination 2" to 4". If the ball does not disengage, the actuator is securely attached. 6. Insert a padlock or bolt through the lock hole for added protection.
ST-70 — TOWING INFORMATION 10. Retract the jack fully. Remove and store the caster, if applicable. BACKING UP 11. Check for proper truck-trailer hook-up; the tow vehicle and trailer should be level with a positive tongue load. For further information, consult a dealer or Atwood Service Center. 2. Before backing up a slope or through soft ground, pull the trailer forward slightly to assure that the actuator socket is in the fully forward position. 12.
ST-70 — TOWING INFORMATION 5. If the pump is to be uncoupled from the tow vehicle after backing with the lever knob engaged, block all pump wheels and pull forward slightly to take strain off of the actuator. Uncouple the actuator by lifting the release handle and raising the trailer tongue. Make sure the lever knob is in the “Towing Position” when uncoupling from the trailer. Extended Storage Instructions The following preventative maintenance is recommended for extended periods of storage. 1.
EXPLANATION OF CODE IN REMARKS COLUMN The following section explains the different symbols and remarks used in the Parts section of this manual. Use the help numbers found on the back page of the manual if there are any questions. The contents and part numbers listed in the parts section are subject to change without notice . Multiquip does not guarantee the availibility of the parts listed. PART NO. PART NAME QTY. 12345 BOLT ....................... 1.... WASHER, 1/4 IN. ........... 12347 WASHER, 3/8 IN.
ST-70 — SUGGESTED SPARE PARTS ST-70 Structural Concrete Pump ST-70 Structural Concrete Pump 3 Units 1 Units Qty. P/N 1 .......... EM16462 .............. 4 .......... EM16463 .............. 4 .......... EM16493 .............. 1 .......... EM16461 .............. 2 .......... EM14408 .............. 2 .......... EM16145 .............. 1 .......... EM16171 .............. 2 .......... EM16816-1 ........... 1 .......... EM16816-2 ........... 2 .......... EM16819 .............. 1 .......... EM25841 .............
ST-70 — DECALS The safety instruction decals shown must be on all Mayco ST70 — Concrete Pump A MANUAL MUST BE STORED IN THIS TUBE AT ALL TIMES. ATTENTION BEFORE SET-UP AND OPERATION OF THIS EQUIPMENT THE DESIGNATED OPERATOR MUST READ AND COMPLETELY UNDERSTAND THE OPERATING AND INSTRUCTION MANUAL INSIDE THIS TUBE. REFER TO MANUAL FOR SERVICE INSTRUCTIONS CHARGE ONLY WITH DRY NITROGEN 1 CAUTION O N LY 2" STEEL CAUTION TOWING 1. USE 2.
ST-70 — DECALS ST- 70 DECALS NO. PART NO. PART NAME QTY.
ST-70 — CONTROL PANEL INSTALLATION PAGE 38 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — CONTROL PANEL INSTALLATION ST- 70 CONTROL PANEL INTALLATION NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 10 11 12 13 EM97073 EM492661 EM492622 EM492357 EM491873 EM5015901 EM491876 EM509738 EM509588 EM503112 EM923027 EM923350 EM492554 PANEL, CONTROL ASSY NUT, 1/4"-NC HEX. WASHER, 1/4" LOCK BOLT, 1/4"-NC x 1" HEX. CONNECTOR CONNECTOR WASHER, CONNECTOR CABLE 18 GA. POLIFLEX BOLT, 3/8"-NC x 2 3/4" HEX. WASHER, 3/8" WASHER, LOCK 3/8" NUT 3/8"-NC HEX.
ST-70 — CONTROL PANEL FRONT PAGE 40 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — CONTROL PANEL FRONT ST- 70 CONTROL PANEL FRONT NO. PART NO. PART NAME QTY.
ST-70 — CONTROL PANEL INTERIOR PAGE 42 — ST-70 — PARTS & OPERATION MANUAL — REV.
1 2 TB1 41 3 4 D20 D16 49 K5 K3 1 5 6 7 18 D8 9 19 PILOT VALVE SOL A 8 TB2 D9 20 PILOT VALVE SOL B 10 1 D3 2 MAGNET VALVE START-STOP 21 11 D1 4 13 22 23 D12 REV SOL 12 D13 COOLING FAN MOTOR 3 D2 BATTERY 5 6 D7 15 25 7 26 9 D19 17 27 D6 28 HYD PRESS COMPENSATOR 8 D17 6 6 30 EXPLODED VIEW OF TERMINAL BLOCK (page 42) ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — CONTROL PANEL INTERIOR ST- 70 CONTROL PANEL INTERIOR NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 EM97050 EM97048 EM97027 EM97078 EM98001 EM98002 EM40711 RELAY (IDEC) RELAY SOLENOID FUSE, 15 AMP DIODE, 6 AMP DIODE, 1 AMP SWITCH, ITL1-1 2 1 3 3 1 19 1 REMARKS PAGE 44 — ST-70 — PARTS & OPERATION MANUAL — REV.
NOTE PAGE ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — MAIN DRIVE PUMPS PAGE 46 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — MAIN DRIVE PUMPS ST-45 MAIN DRIVE PUMPS NO. PART NO. PART NAME 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 27 28 29 30 31 32 33 34 35 36 EM 97088 EM 506611 COUPLING ASSY, ENGINE SOCKET HD. M12 x 20 1 6 EM 25459 EM 509777 EM 509784 EM 505882 EM 492627 EM 503982 EM 97086 EM 25429 EM 509937 EM 492624 EM 492375 EM 609783 EM 609796 EM 16524 EM 492375 EM 25511 EM 509793 EM 509794 EM 509795 EM 509774 EM 16190 EM 509787 EM 25497 ELBOW 90 DEG. HOSE, CASE DRAIN LINE ELBOW 90 DEG.
ST-70 — MANIFOLD CONTROL 2A PAGE 48 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — MANIFOLD CONTROL ST-70 MANIFOLD CONTROL NO. PART NO. PART NAME QTY.
ST-70 — ACCUMULATOR PAGE 50 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — ACCUMULATOR ST-70 ACCUMULATOR NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 EM97015 EM97016 EM509425 EM509353 EM509562 EM492624 EM492598 EM509444 EM492373 ACCUMULATOR CLAMP ADAPTER ELBOW 90 DEG. BOLT, HEX. HD 3/8"-NC x 5/8" WASHER, LOCK 3/8"-NC WASHER, 3/8" BRACKET BOLT, HEX. HD 3/8"-NC x 3/4" 1 1 1 1 2 2 2 1 2 * EM98099 ACCUMULATOR REPAIR KIT 1 REMARKS *NOT ILLUSTRATED ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — HYDRAULIC/CONCRETE CYLINDERS PAGE 52 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — HYDRAULIC/CONCRETE CYLINDERS ST-70 HYDRAULIC / CONCRETE CYLINDERS NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 EM510265 EM16464 EM16465 EM16463 EM14408 EM16493 EM16462 EM16461 EM14407 EM25801 EM25110 EM492624 EM492598 EM492375 EM16174 EM492451 EM50443 EM509417 EM492378 EM508517 EM50425 EM27435-1 EM16460 EM97076 EM97077 EM25497 EM16454 EM505723 EM97024 EM97025 EM18447 EM25474 EM25843 EM265 EM264 EM295 BOLT, HEX.
ST-70 — SHUTTLE TUBE ASSY 38 39 PAGE 54 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — SHUTTLE TUBE ASSY ST-70 SHUTTLE TUBE ASSY NO. PART NO. PART NAME QTY.
ST-70 — HOPPER ASSY PAGE 56 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — HOPPER ASSY ST-70 HOPPER ASSY NO. PART NO.
ST-70 — REMIXER CONTROL ASSY PAGE 58 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — REMIXER CONTROL ASSY ST-70 REMIXER CONTROL ASSY NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 EM25425 EM25508 EM25483 EM25509 EM509378 EM25507 EM25495 EM492553 EM492623 EM218 EM509370 EM98014 EM98015 EM25563 MOTOR, REMIXER ELBOW, 45 DEG. HOSE, MOTOR TO VALVE ADAPTER HOSE, RETURN TO HEAT EXCHANGER ELBOW, 90 DEG. VALVE, REMIXER NUT, HEX. 5/16"-NC WASHER, LOCK 5/16" BOLT, HEX.
ST-70 — THROTTLE ASSY PAGE 60 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — THROTTLE ASSY ST-70 THROTTLE ASSY NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 EM20709-1 EM400 EM26315 EM492357 EM959119 EM722 EM492598 EM492364 EM16740-2 EM16740-1 EM492581 EM492622 EM508821 SOLENOID NUT, HEX. 1/4"-NF ADAPTER BOLT, HEX. HD. 1/4"-NC x 1" CLEVIS STOP NUT NUT, LOCK 5/16"-NC BOLT, HEX. HD. 5/16"-NC x 1" CABLE, THROTTLE HANDLE, THROTTLE NUT, LOCK 1/4"-NC WASHER, LOCK 1/4" BOLT, HEX. HD.
ST-70 — ENGINE AND FRAME 31 29 18 26 30 28 25 24 22 19 20 23 27 21 14 13 32 33 34 35 10 11 12 37 41 28 36 38 12 8 4 15 2 39 40A 3 1 9 5 7 6 42 PAGE 62 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — ENGINE AND FRAME ST-70 ENGINE AND FRAME NO. PART NO. PART NAME QTY.
ST-70 — OIL COOLER ASSY PAGE 64 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — OIL COOLER ASSY ST-70 OIL COOLER ASSY NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EM509805 EM492364 EM923023 EM509791 EM509779 EM509802 EM492622 EM492356 EM492376 EM492598 EM492583 EM509402 EM509345 EM509344 EM509401 EM509343 GUARD, COOLER BOLT, HEX. HD. 5/16"-NC x 1" WASHER, 5/16" COOLER HOSE SHROUD, COOLER WASHER, LOCK 1/4" BOLT, HEX. HD. 1/4"-NC x 3/4" BOLT, HEX. HD. 3/8"-NC x 1" WASHER, 3/8" NUT, LOCK 3/8"-NC NUT FITTING TEE ELBOW, 90 DEG.
ST-70 — FUEL AND HYDRAULIC TANK PAGE 66 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — FUEL AND HYDRAULIC TANK ST-70 FUEL AND HYDRAULIC TANK NO. PART NO. PART NAME QTY.
ST-70 — BATTERY, TAIL LIGHTS, WATER SEPARATOR, GAUGES PAGE 68 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — BATTERY, TAIL LIGHTS, WATER SEPARATOR, GAUGES ST-70 BATTERY, TAIL LIGHTS, WATER SEPARATOR, GAUGES NO. PART NO. PART NAME QTY. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 19A 20 21 22 23 EM26536 EM26536-1 EM492364 EM492623 EM492553 EM492561 EM492622 EM492596 EM25708 EM509105 EM16738 EM16707 EM25523 EM97066 EM97067 EM491396 EM269 EM509449 EM16747 EM26465 EM492356 EM20426 EM716 EM20427 LIGHT, TAIL BRACKET, TAIL LIGHT BOLT, HEX. 5/16"-NC x 1" WASHER, LOCK 5/16" NUT, HEX. 5/16"-NC NUT, HEX.
ST-70 — AXLE AND BRAKES 26 12 8 10 9 11 23 22 24 25 22 7 21 6 PAGE 70 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — AXLE AND BRAKES ST-70 AXLE AND BRAKES NO. PART NO. PART NAME QTY.
ST-70 — HYDRAULIC SURGE BRAKE AND HITCH PAGE 72 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — HYDRAULIC SURGE BRAKE AND HITCH ST-70 HYDRAULIC SURGE BRAKE AND HITCH NO. PART NO. PART NAME QTY. 1 2 3 EM492584 EM492626 EM16602 NUT 1/2"-NC HEX. WASHER, LOCK 1/2" 2" HYDRAULIC SURGE BRAKE ASSY 4 5 EM492401 EM16116 BOLT, HEX. 1/2"-NC x 4" KIT, BRAKE 6 EM16602-1 COVER 2 2 1 .................FOR COMPONENTS: CONTACT YOUR LOCAL ATWOOD DEALER. 2 1 .................INCLS. ( A, B, C, D, E, F, G) FOR THESE COMPONENTS. CONTACT YOUR MAYCO PARTS DEPT.
SERVICE INFORMATION PAGE 74 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — INTERIOR CONTROL PANEL (Inside Door) NOTE: A2 A1 -1 WHITE 4 30 34 -1 -4 -2 45 8 A B 43 22 PL2 PL3 2 55 -4 50 46 SW-3 SW-4 -3 -2 -1 -4 -2 53 -1 32 -3 32 33 PL1 4 17 47 46 46 46 SW-2 6 4 WHITE -3 44 PB-1 -2 ? SW-1 ADDITIONAL ILLUSTRATIONS PAGE 42, 43 57 -2 -3 -4 -4 48 37 57 SW-6 -3 SW-5 -4 -3 -1 32 31 TO TB1 AND TB2 ST-70 — PARTS & OPERATION MANUAL — REV.
15A BLK 32 15A FU2 RED 51 8 12 BLK 52 BLK 34 BLK 34 5 K3 K3 1 K3 K3 BLK 53 4 2 S G 9 10 BLK 34 4 K4 3 K4 11 10 + 2 K4 3 K4 K6 A2 HOUR TB2-6 METER 6 5 D8 D6 K4 D9 PAGE 76 — ST-70 — PARTS & OPERATION MANUAL — REV.
BLK 32 SW3 1 K5 K5 12 9 3 4 8 5 3 3 2 SW6 4 4 1 D17 D15 D14 D13 TB2-10 D19 BLK 57 TB2-9 TB2-8 BLK 37 BLK 38 BLK 33 BLK 32 BLK 31 CONTROL OFF ON REM SW2 ON (REFER TO LOCATION B7) 2 4 OFF BLK 50 OPERATION PUMP ENG BLK 32 SW5 PRESS TEST 3 FAN OFF ON GRN BLK BLK 48 13 13 GRN 56 D20 K5 D16 K3 WHT 14 14 4 BLK 49 SW4 BLK 41 3 DIRECTION FWD REV J1 WHT TB1-23 + REV SOL PRESS TEST SOL UNLOAD SOL MOTOR TEST SOL 0FF PUMP FWD ON REV REMOTE CONTROL
10 00 LHA 1500 W 50 00 20 3000 2500 HYD LINE FROM ACCUM PRESS 3 7 6 [0] BULKHEAD FITTINGS 20 00 LHA 00 30 10 GA RED AIR FILT SW 7 [0] 5000 4000 ENG OIL PRES SW 8 [0] HYD LINE FROM PUMP PRESS PUMPING PRESSURE GUAGE 0-5000 PSI 0 1000 A4 MAGNETIC VALVE START - STOP 0 STRTR SOL ALT ACCUMULATOR PRESSURE GUAGE 0-3000 PSI 0 500 A3 ACS SUPPLIED FUSE LINK 1 B+ D+ 5 [3] 9 30 11 2 34 0 27 34 0 UNLOAD SOL 0 13 0 28 33 14 0 30 HYD PRESS COMP 0 16 PROX SWITCH ROD
EM97026 EM97002 — — EM98005 — EM98004 — EM97011 EM97013 EM97012 EM97006 EM97008 EM97009 — EM97015 — EM97024 EM97025 EM97017 EM25425 EM25454 — — — — — — — ST-70 — HYDRAULIC DIAGRAM ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — OPTIONAL RADIO CONTROL PAGE 80 — ST-70 — PARTS & OPERATION MANUAL — REV.
ST-70 — SERVICE INFORMATION The service procedures contained in this manual are intended for use by an individual equipped with the proper tools and equipment and familiar with safe shop practices. Should questions arise during the service or repair . . . stop . . . and contact Mayco service department. 1-800-30-MAYCO.
ST-70 — SERVICE INFORMATION Maintenance check schedule Day Hour Week x Engine oil Month Time/Hour x Engine air filter x Fuel filter x Hydraulic oil level 6-month 500 x x Lubrication box 2100 Replace Hydraulic oil x Clean hydraulic filters x Axle crank Grease remix bearing 2 x Grease zerks “S” tube x Check system pressure x 40 Hardware for tightness x 40 Cutting ware ring x Trailer brake function x Brake light x Tire condition x Safety devices, decals x x Wheel bearin
ST-70 — SERVICE INFORMATION 2. Lubrication: Grease daily/Hour ■ Main hydraulic cylinders - 2 Place ■ Remix bearings - 2 Place ■ Axle crank - 1 Place ■ Suttle cylinders - 2 Place ■ “S” tube outlet flange - 3 Place Grease Type: Lithium Based EP Texaco Multitak 20 Lubriplate ED-2 3. Accumulator: Use dry nitrogen only, never substitute for any other gas! Contact factory for proper charging procedure. 4. Diesel engine: Refer to engine manufactures instructions. 5.
ST-70 — SERVICE INFORMATION ST70 Pressure Setting Sequence (Setting maximum pump pressure) Step 1: Remove acorn nut from pressure compensator (located on the top front of the Rexroth pump. The compensator is the lower of the two valves) loosen the jam nut and turn the allen screw clockwise until it seats. Step 2: Loosen the jam nut located on the end of the compensator valve. Step 3: Turn the compensator adjustment nut (large) clockwise until tight.
ST-70 — SERVICE INFORMATION ST-70 Accumulator Circuit The accumulator circuit has two functions in the hydraulic system. 1. The accumulator circuit furnishes the hydraulic pressure to cycle the shuttle tube. 2. The accumulator circuit also furnishes the pilot pressure necessary to activate the hydraulic system. The accumulator circuit is equipped with a bladder type accumulator charged with 1100 PSI of dry nitrogen.
ST-70 — SERVICE INFORMATION Problem Hydraulic system trouble shooting Accumulator pressure drops to zero on every cycle Problem No hydraulic oil flow from axial piston pump. Probable cause Delta “Q” compensator not deenergizing when the pump is energized. Solution Check TB1 terminal #17. If this terminal is energized when the pump is turned on, the pump will not cycle because the compensator is dumping control pressure to tank. Check K-3 relay replace if necessary. Volume control not turned open.
ST-70 — SERVICE INFORMATION Electrical System Electrical Problem Proximity switches When starter switch is activated and nothing occurs. The proximity is a normally open switch. The proximity develops a radio frequency, which is emitted from the face of the proximity switch. As the hydraulic drive cylinder piston passes through the radio frequency, the circuit closes and a signal is sent to the pilot cycle valve. This valve cycles the pump and causes the concrete to flow. Probable cause Faulty fuses.
ST-70 — SERVICE INFORMATION Changing the concrete cylinder piston cups The Rubber piston cups will occasionally require replacement depending on the following factors. ■ The fluid level and cleanliness of the lubrication box. ■ The size and type of aggregate. ■ The type of concrete being pumped. It is time to replace the cups when increasingly large particles of sand and cement pass into the lubrication box.
ST-70 — SERVICE INFORMATION Changing the wear plate and ring Due to the swinging motion of the Nun-plate and the abrasive nature of concrete it is normal for the cutting ring to wear on the side that shears through the concrete inside the hopper. If the wear ring and wear plate do not fully seat against each other. The concrete slurry will pump into the hopper. This condition can be easily observed by the sudden change of the level of concrete inside the hopper during each stroke.
ST-70 — SERVICE INFORMATION Wheel Bearings Problem After every 6 months of operation inspect the wheel bearings. Once a year, or when required, disassemble the wheel hubs remove the old grease and repack the bearings forcing grease between rollers, cone and cage with a good grade of high speed wheel bearing greases (never use grease heavier than 265 A.S.T.M. penetration “No. 2.”). Fill the wheel hub with grease to the inside diameter of the outer races and also fill the hub grease cap.
TERMS AND CONDITIONS OF SALE — PARTS Effective: February 22, 2006 PAYMENT TERMS 5. Parts must be in new and resalable condition, in the original Multiquip package (if any), and with Multiquip part numbers clearly marked. 6. The following items are not returnable: Terms of payment for parts are net 30 days. FREIGHT POLICY All parts orders will be shipped collect or prepaid with the charges added to the invoice. All shipments are F.O.B. point of origin.
PARTS AND 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. Tel. (800) 421-1244 Carson, CA 90746 Fax (800) 537-3927 Contact: mq@multiquip.com Mayco Parts 800-306-2926 Fax: 800-672-7877 310-537-3700 Fax: 310-637-3284 Service Department 800-421-1244 Fax: 310-537-4259 310-537-3700 MQ Parts Department 800-427-1244 310-537-3700 MEXICO UNITED KINGDOM MQ Cipsa Carr. Fed. Mexico-Puebla KM 126.
