TB 9-2320-279-13&P-4
FIELD MAINTENANCE
FIFTH WHEEL WILL NOT UNLOCK WHEN DISCONNECTING TRAILER
INITIAL SETUP:
Tools and Special Tools
Parking brake applied (refer to TM 9-2320-279-10).
Tool Kit, General Mechanic's: Automotive (WP
Wheels chocked (refer to TM 9-2320-279-10).
0081, Table 2, Item 5)
Personnel Required
Wheeled Vehicle Mechanic 63B (2)
Equipment Condition
Engine OFF (refer to TM 9-2320-279-10).
TROUBLESHOOTING PROCEDURE
FIFTH WHEEL WILL NOT UNLOCK WHEN DISCONNECTING TRAILER
TEST 1 - Is fifth wheel properly lubricated and free from debris?
1. Check if fifth wheel is free from debris.
TYPICAL
TRAILER
FIFTH WHEEL
Figure 1.
2. If fifth wheel is not free from debris, clear debris from fifth wheel.