TM 5-5420-280-10
0035 00
Bridge Mechanical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. FASTENING RODS WILL NOT SECURE BRIDGE TO PALLET
Step 1. Check for mud debris or damaged threads on fastening rod drive screw.
Clean mud or debris from threads on drive screw. Refer to WP 0046 00.
Ensure bushing threads are lubricated. Refer to WP 0047 00.
Step 2. Check for proper adjustment of fastening rods.
Adjust fastening rods. Refer to WP 0008 00.
Step 3. Check for missing or damaged tiedown strap bracket pins.
If tiedown strap bracket pins are missing or damaged, notify field
maintenance.
END OF TESTING
8. BRIDGE HALF WILL NOT DEPLOY OR RETRIEVE
Step 1. Check height of pallet supporting cylinders.
If bridge half stops at rear pin wheel drive, pallet is too high. Lower
pallet approximately 0.5 degrees.
Step 2. Check side-to-side level of pallet.
If bridge halves are misaligned, adjust side-to-side level of pallet.
Step 3. Check that lower bridge half contacts limit switch KA2 to activate
forward pin wheel drive.
If KA2 is not activated, manually actuate using rod end of retrieval
positioning aid.
9. BRIDGE LAUNCH BEAM MISALIGNED WITH PALLET UPPER ROLLER BLOCK
Check height of bridge launch beam; launch beam should be approximately
4 in. (100mm) below upper roller block rollers.
If launch beam is 4 in. (100 mm) below upper roller block and will not
align with rollers, winch in cable until bridge launch beam aligns with
rollers.
END OF WORK PACKAGE