Troubleshooting 1900 SRM 964
LIFT PUMP AND MOTOR ASSEMBLY
PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION
Low hydraulic pressure. Pump is worn or damaged. Repair or install new pump.
Relief valve needs adjustment. Adjust or replace relief valve.
Hydraulic system relief
valve opens frequently.
Excessive load on forks. Reduce load.
Lift linkage jammed or sticky. Repair lift linkage.
Relief valve needs adjustment, or re-
lief valve is defective.
Adjust or replace relief valve.
Restriction in the pressure side of
the hydraulic system.
Remove restriction or install new
line.
The pump noise is not nor-
mal.
Oil in the hydraulic reservoir is low. Fill reservoir to correct level. Check
for leaks.
Restriction in the inlet hose. Remove restriction, clean screen, or
install new line.
Inlet fitting or inlet hose clamp is
loose.
Tighten fitting. Install new hoses.
Remove air from system.
The pump bearings or gears are
damaged.
Repair or install new pump.
The pump housing is damaged. Repair or replace pump housing.
Loose capscrews holding the pump
housing together.
Tighten capscrews to specified
torque.
Loose capscrews in the pump mount-
ing.
Tighten capscrews to specified
torque.
Relief valve is stuck open. Clean, adjust, or replace the relief
valve.
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