SkyTrak 6036 Service Manual - Manual (Page 265)

8.49 Model 6036 Legacy
Hydraulic System
Not
OK
Not
OK
If there is no four-wheel or crab
steering, check the steer select valve.
Inspect/replace the
steer select valve.
Check the steer select switch and wiring.
Refer to the steering circuits and
components in Section 9.7, “Electrical
System Troubleshooting” and
Section 9.15, “Switches and Solenoids.”
If OK
Not
OK
Not
OK
Not
OK
Not
OK
Not
OK
Not
OK
If there is no steering, check the
steering system electrical
components.
If OK
Adjust/repair/replace the pressure-
reducing valve.
Not
OK
Check the front and rear steering cylinders
for packing leaks.
Repair/replace steering cylinder(s).
If OK
Check pump flow.
If OK
Not
OK
Check the power steering unit. Replace power steering unit.
Not
OK
Front or rear wheels are not parallel
in front or four-wheel steering mode.
Perform indexing procedure on vehicle.
Check wheel alignment.
Not
OK
Check the steer select valve. Replace the steer select valve.
If OK
If OK
Check the main system pressure at the
“VG” port on the unloader valve.
Adjust/repair/replace the differential
pressure sense valve.
Check the shuttle valve. Replace shuttle valve.
If OK
If OK
Repair/replace pump.
Refer to the steering circuits and
components in Section 9.7, “Electrical
System Troubleshooting” and Section
9.15, “Switches and Solenoids.”
Check the pressure at the “PSG” port of the
secondary function manifold.
Not
OK
Check packing in steering cylinders.
If OK
Repair/replace cylinder.
If OK
If OK
If OK
Not
OK
Check that the check valve fitting at the
power steering unit is operating properly.
Replace check valve fitting.
Refer to ZF Axle Repair Manual:
Model MS-T 3045,
JLG P/N 8990419
(ZF P/N 5871 550 002).