Possible Cause Corrective Action
The pump charge pressure is low. Check the static implement pressure.
An excessive load on the hydraulic
system.
Reduce the load on the hydraulic
system.
Poor hydrostatic drive performance.
Possible Cause Corrective Action
Hydraulic pump damage. Inspect and repair or replace the
hydraulic pump as needed.
Hydraulic motor damage. Inspect and repair or replace the
hydraulic motor as needed.
Hydraulic fluid flow restriction. Replace hydraulic filters.
Excessive noise in the hydraulic system.
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.
Incorrect hydraulic fluid type. Replace the hydraulic fluid.
The hydraulic system is cold. Allow the hydraulic system to warm up.
Forward and reverse movement lack power and
torque.
Possible Cause Corrective Action
The tow valve on the hydraulic pump is
allowing oil to bypass.
Tighten the tow valve.
The high / low shift cable is out of
adjustment or broken.
Inspect the high / low shift cable replace
the cable as needed.
Rotating group in the hydraulic pump or
a hydraulic motor is worn.
Inspect the hydraulic pumps and motors,
repair or replace as needed.
4520P Page 3–5 Troubleshooting: General Hydraulic System Problems
09.40003Rev 00
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