24 bar (348 psi) Not Obtained
CHECKS
Is the hydraulic oil level in reservoir OK and the shut-off valve fully open?
PROBLEM 20
The hydraulic system is operating hot.
POSSIBLE CAUSES
Low hydraulic oil level in reservoir, heat exchanger problem, dirty filter,
system multifunction valves are not set correctly, pump or motor problem.
Yes
No
Fill the tank to full level or open shut-off valve.Is the heat exchanger radiator clean?
Yes
No
Clean, repair or replace the heat exchanger radiator.
Yes No
Is the charge pressure 24 bar (348 psi) at the system pressure sensor?
Yes No
Are the system multifunction valves
operating at the recommended system
pressures?
Are the suction filters clean?
Replace the filters.
Yes
No
Adjust or replace the problem
valve. (See Section 2 -Setting
Pump Pressure.)
Adjust the charge pressure relief valve for 24 bar (350 psi). (See
Section 2 - Checking and Adjusting Charge Pressure.)
24 bar (348 psi) Obtained
System should be at the
correct temperature.
Check for internal leakage at the pump and motor. (See Section 2 -
Testing for Pump or Motor Leakage.)
Normal High Leakage
Is the system operating pressure excessive?
Yes No
Repair or replace the pump
or motor, as required.
Repair or replace the pump
or motor, as required.
Locate and reduce the load
on the motor transmission.
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