LS600 PUMP — TROUBLESHOOTING (PUMP)
The hydraulic troubleshooting procedures listed below are intended for use by individuals equipped with the proper tools and equipment and are familiar with hydraulic systems and safe shop practices. Use the Pump Troubleshooting Table (Table 8) to identify possible causes for the pump’s malfunction. Contact the Multiquip Service department for the proper repair procedure.
DANGER - AMPUTATION RISK
During routine maintenance or removing material blockage, you will be required to put your hand in the concrete cylinders or near the shuttle tube.You are at EXTREME RISK of injury or AMPUTATION if the engine is running or if pressure is in the hydraulic system.
Prior to performing any maintenance on the pump, follow described lock
accumulator pressure gauge MUST read ZERO. ALWAYS make sure the accumulator circuit pressure reads
zero prior to performing any maintenance on the pump.
WARNING - HYDRAULIC SYSTEM HAZARD
DO NOT open hydraulic lines or loosen hydraulic fittings while the engine is running! Hydraulic fluid under pressure can penetrate the skin, blind, cause burns or create other potentially dangerous hazards.
TABLE 9. PUMP TROUBLESHOOTING
Problem | Possible Problem | To Troubleshoot | |
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| Incorrect System Operating | Check the pump pressure gage. Verify | |
| Pressure | it is approx. 4400 PSI | |
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| Incorrect Engine RPM setting | Verify the engine's high RPM speed is | |
Main Hydraulic Cylinder will | set to 2550 | ||
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not cycle | Contaminated Main Relief Valve | Check the manifold for a contaminated | |
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| Relief Valve | ||
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| Obstructed Material Cylinders | check for obstructions (dried material) | |
| inside the cylinders | ||
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| Incorrect Directional Control | Verify the Directional Control operating | |
| Operating Pressure | pressure is approx. 1000 PSI | |
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| Contaminated Relief Valve | Check the manifold for a contaminated | |
Hopper Remix Paddles will | Relief Valve | ||
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not rotate | Broken Shaft Coupler Key | Check the Hopper Remixer shaft | |
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| coupler for a broken key | ||
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| Loose Shaft Retaining Set Collar | Check the Shaft Retaining Set Collar | |
| for tightness | ||
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PAGE 62 — MAYCO LS600 PUMP — OPERATION AND PARTS MANUAL — REV. #4 (9/15/11)