Test No. 3: Power Steering Relief Pressure - Toro Workman 3000 Series Service Manual

TEST NO. 3: Power Steering Relief Pressure(Units with Lift Capabilities Only)
IMPORTANT:This test can be performed on units
with dump cylinders installed. Units without dump
cylinders installed do not have a separate relief
valve installed for the steering valve.
1. Make sure hydraulic oil is at normal operating temper-
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.
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 turn steering wheel all the
way to stop and hold so oil flow goes over relief.
Workman 3000/4000 Series
Install tester in
series between
pump outlet and
dump valve
Figure 13
CAUTION
Page 9 – 15
Tester
Steering relief pressure
If unable to get specified pressure, check for worn or
stuck relief valve.
Figure 14
Rev. D
1,000 + 100 PSI
(6,895 + 690 kPa)
Steering
relief valve
cartridge
Hydraulic System