TM 5-5420-278-24&P
0064 00
0064 00-1
DIRECT SUPPORT TROUBLESHOOTING
IMPROVED RIBBON BRIDGE (IRB)
RAMP BAY M16
NSN 5420-01-470-5825 P/N 12478918;
INTERIOR BAY M17
NSN 5420-01-470-5824 P/N 12478919.
MECHANICAL TROUBLESHOOTING
NOTE
Refer to the general instructions in Introduction to
Troubleshooting, WP 0061 00, prior to performing mechanical
troubleshooting.
1.
FOLDLOCK WILL NOT ENGAGE OR HOLD WHEN ENGAGED
Check foldlock catch on outer ponton for excessive wear or damage.
Repair or replace catch if excessively worn or damaged.
END OF TESTING
2.
INNER OR OUTER PONTON LEAKING
Check ponton for structural damage such as cracks, broken welds, or holes.
a. Repair visible structural damage by welding; refer to TC 9-237, Welding Theory and
Application.
b. After structural damage is repaired, perform ponton leak test (WP 0059 00).
END OF TESTING
3.
LOWER LOCK-DRIVE WILL NOT ENGAGE
Check for worn or damaged connecting eyes on inner ponton main lower coupling (interior bay
only) or yoke (ramp bay only).
If worn or damaged, repair by welding; refer to TC 9-237, Welding Theory and Application, or
replace lower main coupling (WP 0048 00) or yoke (WP 0030 00).
END OF TESTING
4.
UPPER COUPLING WILL NOT ENGAGE IN RECEPTACLE BLOCK
Check for heavily worn or damaged transverse receptacle block.
Notify (EWK) field service.
END OF TESTING
Direct Support Mechanical Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
