TM 9-2320-360-10
Table 3-1. Troubleshooting (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
FIFTH WHEEL
1.
FIFTH WHEEL WILL NOT LOCK WHEN COUPLING TRAILER TO HET TRACTOR.
Step 1.
Check if dirt, ice, snow, or other debris has built-up on fifth wheel.
Clean dirt, ice, snow, and other debris from fifth wheel.
Step 2.
Check if secondary lock release handle is in the locked position.
Push secondary lock release handle in to the locked position.
Step 3.
Check if primary lock release handle is in the locked position.
Push primary lock release handle in to the locked position.
2.
EXCESSIVE MOVEMENT OF TRAILER KING PIN IN FIFTH WHEEL.
Check for loose or missing fifth wheel mounting screws or locknuts.
Notify unit maintenance if any hardware is loose or missing.
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