TM 9-2320-209-10-1
Tractor Trucks Controls and Indicators.
d.
3.
Fifth wheel operating handle. Is
1.
Airbrake hand control lever. Con-
trols semitrailer airbrake system.
pulled forward to unlock jaws and
When lever is moved down, brakes
separate semitrailer from tractor.
are on.
Safety latch. Makes sure that there
4.
is a positive locking of the fifth
2.
Airbrake hose coupling shut-off-
wheel jaws. The safety latch must
cocks. Are turned on (up position)
be moved left or right to move
to let air enter semitrailer brake
operating handle.
system after it is hooked up and
must be turned off (position shown)
before trailer is unhooked.
