Ventrac 4520P - General Hydraulic System Problems

General Hydraulic System Problems
Hydraulic fluid is leaking from the system.
Possible Cause Corrective Action
The fitting(s), hose(s), or tube(s) are
loose or damaged.
Secure or replace loose or damaged
hydraulic connections.
The O-ring(s) or seal(s) are missing or
damaged.
Install a new O-ring(s) or seal(s).
The hydraulic fluid foams excessively causing fluid
leakage from the hydraulic tank breather.
Possible Cause Corrective Action
The hydraulic fluid level is low.
Note: Refer to the machine Operator’s
Manual for hydraulic fluid specifications.
Adjust the hydraulic fluid level.
Incorrect hydraulic fluid type. Replace the hydraulic fluid.
Incompatible hydraulic fluids are mixed
in the system.
Replace the hydraulic fluid.
There is water in the hydraulic system. Replace the hydraulic fluid.
The pump suction line has an air leak. Replace the pump suction line.
The suction filter is loose or filter seal
has failed.
Secure, or replace the filter.
The hydraulic system operates hot (exceeds 118°C
(245°F).
Possible Cause Corrective Action
The circuit breaker for the hydraulic
cooling fan is tripped.
Determine what is causing the circuit
breaker to trip.
The hydraulic cooler air flow is
obstructed.
Verify cooling fan operation and remove
debris from in and around the fluid
cooler.
A faulty hydraulic cooling fan
temperature sender.
Replace the cooling fan temperature
sender as required.
A faulty hydraulic cooler fan. Replace the hydraulic cooler fan.
4520P Page 3–3 Troubleshooting: General Hydraulic System Problems
09.40003Rev 00