TM 9-2330-203-14&P
2-11.
COUPLING SEMITRAILER TO DOLLY (Con't).
WARNING
All personnel must stand clear of towing vehicle, dolly, and trailer during coupling
operation. Failure to follow this warning may result In serious injury or death to
personnel.
CAUTION
Have assistant direct you during backing operations. Damage to equipment may result
if caution Is not followed.
e. Ensure that coupler jaws (2) on dolly fifth wheel (1)
are open. Align center of fifth wheel with semitrailer
kingpin. Slowly back dolly under semitrailer. When
coupler jaws engage kingpin, jaws will automatically lock.
f. Set semitrailer brakes and check security of coupling.
CAUTION
Do not drive towing vehicle forward beyond limits of
air hose length, unless air hoses have been
disconnected. Failure to follow this caution will
result in damage to air hoses.
g. If coupling is unsatisfactory and must be
repeated, carefully drive towing vehicle forward within
limits of air hose. If additional distance is required,
disconnect air hose after ensuring that semitrailer brakes
have been set.
h. Connect proper intervehicular cable, to 12 or 24-
volt socket on semitrailer. Operate semitrailer lights from
towing vehicle and ensure that all lights operate properly.
i. Raise semitrailer landing leg as high as it will go to provide maximum road clearance.
j. Remove chock blocks from behind semitrailer wheels.
2-12.
TOWING INSTRUCTIONS.
a. When towing a trailer, overall length of unit must be kept in mind when passing other vehicles and when turning.
b. Turning and backing operations will be affected because towing vehicle, dolly, and trailer act as hinged unit.
c. Follow prescribed speeds at all times. Refer to towing vehicle technical manual.
d. When parking for extended periods, set handbrakes on towing vehicle and trailer.
e. If parked on hill, chock wheels.
f. Refer to FM 21-305 for further information on driving practices.
TA510665
2-10
