350 psi not obtained
CHECKS
Is hydraulic oil level in reservoir ok?
PROBLEM 22
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 tank to full level or open shut-off valve.
Is heat exchanger radiator clean?
Yes No
Clean, repair or replace heat exchanger radiator.
Yes
No
Are fans turning?
Adjust, repair or replace fan motor, fan relief valve or pump.
Yes No
System charge pressure is 350 psi 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. (See Tes t
18.)
Adjust charge pressure relief valve for 350 psi. (See Te s t
19.)
350 psi obtained
System should be at correct temperature.
Check for internal leakage at pump and motor. (See Te s t
8.)
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.
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