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 207 of 452
COUPLING AND CONNECTING TRACTOR TO TRAILER - CONTINUED
13. Leave cab and verify primary and secondary release controls on fifth wheel are in
and fifth wheel has not moved from position selected.
14. Kingpin must be in fifth wheel locks. Daylight should not be seen between upper
fifth wheel plate of trailer and fifth wheel.
15. Ensure kingpin is not hooked over front of fifth wheel.
16. Lift and secure trailer landing gear and stow crank handle in holder.
17. Connect necessary lamp cables, 12V for normal lamps and/or 24V for blackout
lamp operation.
18. Check operation of trailer lights.
19. Using hand control in cab, check operation of trailer brakes.
20. Check all tires.
21. Ensure air supply is adequate before starting out.
Figure 6. Tractor and Trailer Coupling.
TRACTOR
KINGPIN
KINGPIN
AIR HOSES
FIFTH
WHEEL
TRAILER
CENTERLINE
HOLDER
TRAILER
LANDING
GEAR
CRANK
HANDLE
TM 9-2320-273-10
0012
0012-9
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