TM 9-2330-359-14&P
2-10. COUPLING SEMITRAILER TO TOWING VEHICLE (Con’t).
CAUTION
Have assistant direct you during backing operations. Damage to equipment may result
if caution Is not followed.
b. Aline towing vehicle with semitrailer and slowly back towing vehicle so that kingpin (5) alines with coupler
jaws (9). Ensure that kingpin is at proper height to engage fifth wheel (10). Minimum kingpin height is above tractor
approach ramps (8). Maximum kingpin height is 11/2 in. (3.8 cm) below fifth wheel. Adjust height of semitrailer with
landing gear (6).
c. Slowly back towing vehicle until coupler jaws (9) engage kingpin (5) and lock.
NOTE
Step d applies to all models except M872A1.
d. Connect 24-volt electrical connector to electrical receptacle (4), or 12-volt electrical connector to electrical
receptacle (3).
NOTE
Step e applies only to M872A1.
e. Connect 24-volt electrical connector to electrical receptacle (3),or12-volt electrical connector to electrical
receptacle (4).
f. Connect service air line to semitrailer air coupling (1). Connect emergency air line to semitrailer air
coupling (2),
g. Pressurize air system by applying towing vehicle brakes. Ensure that fifth wheel locking plunger lever (12)
and safety latch (11) are in locked position.
h. Engage handcrank (7) and raise landing gear (6).
i.
Fold and stow handcrank (7), and remove and stow chock blocks.
2-10
