350 psi not obtained
CHECKS
Is “hydraulic fluid temp high” fault displayed on digital display?
Problem 24
Hydraulic system is operating hot.
POSSIBLE CAUSES
Low hydraulic oil level in reservoir; High hydraulic oil temperature; Water or air in hydraulic
oil; Wrong oil viscosity for application; Heat exchanger problem; Dirty filter; System
multifunction valves are not set correctly; Pump or motor problem.
Yes
No
Fill tank to full level or open shut-off valves.
Is heat exchanger radiator clean?
Yes
No
Clean, repair or replace heat exchanger radiator.
Yes
No
System charge pressure is 350 psi (24 bar) at pressure sensor station?
Yes No
System multifunction valves are operating
at recommended system pressures?
Are suction filters clean?
Replace filters.
Yes No
Adjust or replace
problem valve.
Adjust charge pressure relief valve for 350 psi (24 bar).
(See Section 2 - Charge Pressure Adjustment).
350 psi obtained
System should be at
correct temperature.
Check for internal leakage at pump and motor.
(See Section 2 - Motor Leakage Test).
Normal
High Leakage
Is system operating pressure excessive?
Yes No
Repair or replace pump or motor, as required.
Repair or replace pump or
motor, as required.
Locate and reduce load
on motor transmission.
Is hydraulic oil level in reservoir OK and shut-off valves are open?
Yes
No
Check temperature of hydraulic fluid with a temp-
erature monitor. Is fluid temperature above 180 F?
Yes
No
Replace tank temperature sensor.
Is hydraulic fluid clean
and free of water?
Yes
No
Recondition or replace fluid.
To Next Page
Loading...
