TM 10-3930-641-34-1
STEERING SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. VEHICLE DOESN'T TURN WHEN STEERING WHEEL IS TURNED
Step 1. Inspect flow control valve.
a.
Check for and remove any foreign matter.
b.
Replace valve springs. (See page 6-28.)
Step 2. Inspect pilot relief valve or valve seat for defects.
Repair as necessary. (See page 6-28.)
Step 3. Inspect pilot relief valve seat seal for defects.
Replace seal. (See page 6-28.)
2. VEHICLE TURNS BY ITSELF
Step 1. Determine if flow balance spool returns to neutral after a turn.
Adjust or repair as necessary. (See page 6-28.)
Step 2. Inspect sleeve valves in hand metering unit for foreign material. (See page 6-14.)
Clean sleeve valves.
Step 3. Inspect hand metering unit centering springs.
Replace centering springs. (See page 6-14.)
3. AT HIGH SPEEDS, VEHICLE TURNS TOO FAST TO MAKE SMALL STEERING CORRECTIONS
Step 1. Test flow control valve for correct adjustment. (Page 6-28.)
Remove shims from flow balance spool to increase steering time. (See page 6-28.)
Step 2. Determine if flow balance spool moves freely.
a.
Inspect metering orifice on flow balance spool for foreign material.
Clean flow balance spool.
b.
Inspect springs of flow balance spool.
Replace springs. (See page 6-28.)
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