Skytrak 6042 Service Manual User Manual download pdf (Page 277)

8.45

Model 6042 Legacy Origin 7/02

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,

OmniQuip P/N 8990419

(ZF P/N 5871 550 002).

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