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TM 9-2330-272-14
2-10. COUPLING SEMITRAILER TO TOWING VEHICLE (Con’t).
CAUTION
b.
Use a ground guide during backing operations. Damage to equipment may result if
caution is not followed.
Aline towing vehicle with semitrailer and slowly back towing vehicle. Stop towing vehicle before its fifth
wheel plate (6) contacts upper fifth wheel plate (9) of semitrailer.
c. Remove dummy couplings from service air coupling (1) and emergency air coupling (2) at front of
semitrailer. Connect towing vehicle service air hose to semitrailer service air coupling. Connect towing vehicle
emergency air hose to semitrailer emergency air coupIing.
d. Open air shutoff valves on towing vehicle and apply semitrailer brakes.
e. Check that kingpin (10) is centered between approach ramps (4). Adjust kingpin height by raising or
lowering landing gear legs (11):
(1) Release handcrank (13) from stowage clip (12).
(2) Rotate handcrank (13) clockwise to raise Ianding gear legs (11) or counterclockwise to lower
landing gear legs.
(3) Stow handcrank (13) in stowage clip (12).
f. After kingpin (10) height is properly adjusted, slowly back towing vehicle until coupler jaws (5) engage
kingpin. Inch forward to ensure that coupling is locked. If coupling is not locked, rock back and forth until kingpin locks.
g. Connect towing vehicle intervehicular cable to semiitrailer receptacle (3).
h. Ensure that fifth wheel Iocking plunger lever (8) and safety Iatch (7) are in locked position.
TA702646
2-20
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