TM 5-5420-278-10
0058 00
0058 00-4
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Operator’s Mechanical Troubleshooting (Contd)
7. LOWER LOCK-DRIVE WILL NOT ENGAGE
Step 1. Check for possible misalignment of ponton connecting eyes.
Align bay connecting eyes (malfunction 12).
Step 2. Check for seized jackscrew at upper and lower trunnion nuts.
Lubricate jackscrew.
Step 3. Check for bent jackscrew or damaged threads.
If threads are damaged or jackscrew is bent, notify unit
maintenance.
Step 4. Check lower lock-drive assembly for jamming due to debris or
damage resulting in misalignment.
a. Remove debris from lower lock-drive assembly.
b. If damage causing misalignment is suspected, notify unit
maintenance.
Step 5. Check for bent or damaged connecting eyes on inner ponton main
lower coupling (interior bay only).
If damaged, notify unit maintenance.
Step 6. Check for bent or damaged connecting eyes on yokes (Ramp Bay
only).
If damaged, notify unit maintenance.
END OF TESTING
8. SWIVEL HOOK WILL NOT ENGAGE OR HOLD WHEN ENGAGED
(RAMP BAY ONLY)
Step 1. Check for obstructions such as rocks or debris in swivel hook or
retainer pin cavities.
Remove debris from swivel hook or retainer pin.
Step 2. Check retainer pin for out of adjustment condition.
Notify unit maintenance to check adjustment.
Step 3. Check for bent or damaged tension spring assembly.
If bent or damaged, notify unit maintenance.
END OF TESTING
