SkyTrak 6036 Service Manual - Manual (Page 255)

8.39 Model 6036 Legacy
Hydraulic System
Not
OK
Not
OK
Not
OK
Not
OK
Not
OK
Not
OK
If there is no front-wheel steering,
check the pressure at the “PSG” port
of the secondary function manifold.
Adjust/repair/replace the pressure-
reducing valve on secondary
function manifold.
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/replace the differential pressure
sense valve.
Check that the check valve fitting at the
power steering unit is operating properly.
Replace check valve fitting.
Check the shuttle valve. Replace shuttle valve.
If OK
If OK
Repair/replace pump.
Not
OK
Check packing in steering cylinders.
If OK
Repair/replace steering cylinder(s).
If OK
If OK
If OK
Refer to ZF Axle Repair Manual:
Model MS-T 3045,
JLG P/N 8990419
(ZF P/N 5871 550 002).