Service Manual

TEST NO. 2: Remote Hydraulics Relief Pressure
Install tester in
series between
pump outlet and
dump valve
Tester
Figure 11
1. Make sure hydraulic oil is at normal operating temper-
Remote hydraulics 1,900 + 100 PSI
relief pressure (13,100 + 690 kPa)
ature before performing tests.
2. Raise and support dump box, if equipped, then en-
gage parking brake and stop the engine.
3. Install tester in series between pump outlet (pressure
hose) and dump valve. Make sure tester flow control
valve is open.
CAUTION
The engine must be running to perform hy-
draulic tests. To guard against possible per-
sonal injury, engage parking brake and keep
clothing, hands, feet, face and other parts of
the body away from fan or other moving parts.
4. Start the engine and operate at full speed (3,600
RPM). Leave tester flow control valve open. While
watching pressure gauges actuate and hold remote hy-
draulics control lever so oil flow goes over relief.
If unable to get specified pressure, check for:
– Worn or stuck relief valve.
– Internal leakage of remote cylinder(s).
Remote hydraulics
relief cartridge
Figure 12
Hydraulic System Page 9
– 14 Workman 3000/4000 Series