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PAGE 64 — MAYCO LS600 PUMP — OPERATION AND PARTS MANUAL — REV. #4 (9/15/11)
TABLE 9. PUMP TROUBLESHOOTING (CONTINUED)
Problem
Possible Problem
To Troubleshoot
Main Hydraulic Pump Noisy
Insufficient oil
Check oil level and for closed suction
strainer
Air in system
Check for aeration reservoir
Vacuum leak in suction line
Excessive pump wear
Repair or replace
Excessive engine speed
Check for correct engine RPM
Engine bogs down
Low engine speed
Check engine RPM
Main relief cartridge set to low
Adjust relief cartridge
Engine overloaded when pumping
Decrease volume control on main
pump
Material hose pack
Machine does not deliver volume and
pressure
Low engine speed
Check engine RPM
Volume control set to low
Adjust control to full open setting
Main hydraulic pressure too low
Check for proper pressure or for
contaminated relief cartridge
Hydraulic fluid gets hot
Cooling fan
Check fan electrical connection or for
burnt fan motor.
Fan rotating in wrong direction
Contaminated cooler fins
Clean cooler fins
Return filter element closed
Replace filter
Main relief cartridge contaminated or
set too low
Replace or set to proper pressure
Hydraulic oil level too low
Fill to proper level
Accumulator gauge reads below 1750
PSI
Accumulator bottle low on notrogen
Check precharge pressure 1100 PSI
Contaminated safety relief cartridge
Replace cartridge
Defective unloader cartridge electrical
coil
Replace
Unloader cartridge coil not energizing Check for 12 Volt signal voltage
Defective gear pump
Replace pump
Concrete slurry in lubrication box
Worn or defective urethane cups or
worn material cylinder
Replace
Material cylinder piston cups squeel
Low on lubrication
Check oil level
Cylinders not completely extended
(short stroke)
Excessive amount of hydraulic on
cylinder rod side
Inspect cylinder. Check values for
contamination or faulty spring
Hydraulic cylinder piston head seal
leaking
Replace seals
LS600 PUMP
— TROUBLESHOOTING (PUMP)
Summary of Contents for MAYCO LS600
Page 3: ...MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 PAGE 3 NOTES...
Page 11: ...MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 PAGE 11 NOTES...
Page 81: ...MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 PAGE 81 NOTES...
Page 92: ...PAGE 92 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP FRAME ASSY...
Page 96: ...PAGE 96 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP BRAKE LINE ASSY...
Page 98: ...PAGE 98 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP BRAKE LIGHT ASSY...
Page 102: ...PAGE 102 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP BATTERY ASSY...
Page 104: ...PAGE 104 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP HOPPER ASSY...
Page 116: ...PAGE 116 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP FUELTANK ASSY...
Page 120: ...PAGE 120 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP ACCUMULATOR ASSY...
Page 130: ...PAGE 130 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP ENGINE ASSY...
Page 134: ...PAGE 134 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP THROTTLE ASSY...
Page 138: ...PAGE 138 MAYCO LS600 PUMP OPERATION AND PARTS MANUAL REV 4 9 15 11 LS600 PUMP HYD PUMP ASSY...