Troubleshooting 79
Hydraulic pump worn or defective Replace pump. See Hydraulic Pump on page 152.
Operating cylinder piston seals leaking Perform test for leaking operating cylinder seals and
repair as required.
Incorrect grade of hydraulic fluid for
current operating conditions
Refill with proper grade of hydraulic fluid (see Leach
Hydraulic Fluid Recommendation on page 42).
Wiring defective Repair and replace as required. See Chapter 8 Service
and Repair.
TAILGATE WILL NOT RAISE
Possible cause Remedy
Tailgate clamps still engaged Disconnect clamps and swing free of tailgate.
Insufficient hydraulic pressure Check main relief pressure (see Checking Main Line
Pressure on page 62).
Hydraulic pump is defective Replace pump. See Hydraulic Pump on page 152.
Main relief cartridge out of adjustment
or broken
Adjust or replace main relief cartridge as necessary.
See Chapter 8 Service and Repair.
Tailgate lift cylinders leaking or
defective
Repair or replace as required.
Restriction in tailgate cylinder hose Remove and clean hose.
CONTAINER WON’T LIFT
Possible cause Remedy
Insufficient hydraulic pressure Check pressures as described in Checking Pressures on
page 61.
Cable broken Replace cable.
Cable loose from the lifting device
(drum/cylinder)
Secure cable to lifting device.
Container overload Reduce weight of material in container.
Container frozen to the ground Do not use lifting device to break container loose
from the ground.
CYCLE TIME TOO SLOW
Possible cause Remedy
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