TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 205 of 452
EQUIPMENT CHECKS
Check tractor and trailer as follows before backing tractor under trailer.
1. Visually check fifth wheel for cracked, damaged, or missing parts.
2. Check mountings for good condition and mounting bolts for tightness.
3. Ensure all moving parts and top of fifth wheel are properly lubricated.
4. Check lock guard for proper operation. Notify your supervisor to have lock guard
replaced if damaged or missing.
5. Ensure both primary and secondary lock release handles are pulled out and lock
guard is open to accept trailer kingpin.
6. Ensure fifth wheel ramps are down, level with, or slightly below, angle of trailer
pickup ramps.
7. Adjust trailer height so fifth wheel picks up trailer on fifth wheel ramps.
8. On the M915A1, ensure sliding fifth wheel control lever is in LOCK position.
END OF TASK
Figure 5. Fifth Wheel Equipment Checks.
PRIMARY RELEASE
HANDLE
SECONDARY
RELEASE
HANDLE
SECONDARY
RELEASE
HANDLE
LOCK GUARD
LOCK GUARD
LOCK GUARD
M915
M916 and M920
M915A1
PRIMARY RELEASE
HANDLE
TM 9-2320-273-10
0012
0012-7
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