Possible Cause Corrective Action
The hydraulic cooler is damaged or
plugged.
Repair or replace the hydraulic fluid
cooler.
The hydraulic system is overstressed
(using high range instead of low range
for heavy workloads).
Allow the system to cool and reduce
load on the system.
The hydraulic fluid level is low.
Note: Refer to the machine Operator’s
Manual for hydraulic fluid specifications.
Adjust the hydraulic fluid level.
The suction filter is loose, or filter seal
has failed.
Secure, or replace the filter.
The hydraulic fluid suction filter is
plugged.
Replace the suction filter.
The hydraulic fluid is contaminated, or
the fluid viscosity is too light.
Replace the hydraulic fluid.
The front attachment does not lift.
Possible Cause Corrective Action
The hydraulic fluid level is low. Adjust the hydraulic fluid level.
An excessive load on the front lift. Reduce the load on the front lift.
The hydraulic fluid suction filter is
plugged.
Replace the suction filter.
A faulty hydraulic lift cylinder. Replace the hydraulic lift cylinder.
The pump charge pressure is low. Check the static implement pressure.
Missing hardware on the lift cylinder. Repair / install the missing hardware.
Missing hardware on the SDLA lever
links.
Repair / install the missing hardware.
Steering is difficult.
Possible Cause Corrective Action
The hydraulic fluid level is low. Adjust the hydraulic fluid level.
The hydraulic fluid suction filter is
plugged.
Replace the suction filter.
A faulty steering cylinder. Replace the steering cylinder.
Troubleshooting: General Hydraulic System Problems Page 3–4 4520P
09.40003Rev 00
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