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TM 9-2320-270-10
COUPLING AND UNCOUPLING - CONTINUED
6. Prepare semitrailer for coupling.
7. Check semitrailer kingpin height. Adjust, if not correct, so that fifth wheel picks up
semitrailer on fifth wheel ramps.
Backing M911 Truck Tractor Toward Semitrailer
1.
2.
3.
W A R N I N G
Do not permit anyone to stand directly between the M911 Truck Tractor and
semitrailer during the coupling procedure. Failure to follow this warning can
result in injury to personnel.
Aline M911 Truck Tractor straight in front of semitrailer.
Direct crew member to stand at left rear of M911 Truck Tractor (never directly behind) to
give coupling instructions.
Slowly back M911 Truck Tractor under semitrailer gooseneck (1) so that it slides up
approach ramps (2) with semitrailer kingpin (3) centered as closely as possible in throat
of fifth wheel (4).
4.
5.
6.
2-84
Make sure you have picked up semitrailer with fifth wheel ramps (5). If kingpin (3)
comes in too high, it will not enter fifth wheel (4) correctly.
CAUTION
Be careful not to run kingpin up fifth wheel ramps. This can damage kingpin,
fifth wheel, or payload.
When you have correctly picked up semitrailer, stop backing. Stopping after pick-up and
before locking helps prevent hitting too hard.
Continue backing until fifth wheel (4) locks firmly to kingpin (3).
TA220857
Change 5
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