2-12. COUPLING SEMITRAILER TO TRACTOR (Con't).
k. Pull air reservoir draincock cable (17) and allow all moisture to spray or drain from air
l. Inside tractor, fully pressurize semitrailer air system (see TM 9-2320-273-10 or TM 9-
m. Pull tractor forward and check operation of semitrailer brakes (see TM 9-2320-273-10 or
If semitrailer is connected to 24 V intervehicular electrical cable, turn sig-
nal/taillight operates also as stop/taillight. Stop/taillight will not operate.
n. Check operation of all lights (see TM 9-2320-273-10 or TM 9-2320-283-10).
2-13. TOWING SEMITRAILER.
When driving tractor and semitrailer, overall length of unit must be kept in mind when
passing other vehicles and when turning.
Turning and backing operations will be affected because the semitrailer and tractor
are a hinged unit.
The semitrailer load will affect stopping and overall maneuverability. A partially loaded
semitrailer is more unstable than a fully loaded one. This is because fuel surge is more
pronounced with a partial load. Always drive semitrailer at safe speeds and make note
of any driving irregularities.