Section I. STEERING TROUBLESHOOTING.
GENERAL INFORMATION. This section lists the common steering malfunctions which may occur during the
operation of the 130G Grader. You should perform the tests, inspections and corrective actions in the order listed. Follow
the troubleshooting procedures listed below step-by-step until you can go no further.
STEERING TROUBLESHOOTING PROCEDURES. This section cannot list all possible malfunctions, nor can it
list all possible tests, inspections or corrective actions. If a malfunction is not listed, contact your supervisor.
STEERING TROUBLESHOOTING AND MAINTENANCE PROCEDURES.
TEST OR INSPECTION
WHEELS TURN SLOWLY OR NOT AT ALL WHEN STEERING WHEEL IS TURNED.
Check steering pressure reducing valve. Reducing valve is part of steering combination
valve. Vent hydraulic system. Refer to LO 5-3805-261-12. Remove plug and preformed
packing from reducing valve (Figure 8-1). Install multi-range pressure gage. Start engine
and operate all implements to raise temperature of hydraulic oil to 145 to 150 degrees F.
Refer to TM 5-3805-261-10. Increase engine speed to 1500 rpm. Pressure gage should
read 1800 to 1850 psi. Stop engine.
If pressure is within limits, go to Step 2. To change pressure, add or remove shim(s) as required (Figure 8-1).
One shim will change pressure approximately 25 psi. Refer to paragraph 8-7.