TM 9-2320-260-10
(18) Pull down on airbrake hand control lever (8) to check service airbrake system.
Air should be heard passing through control valve.
NOTE
If air flow is not heard, recheck hose connections and position of
air valve levers. If correctly connected and air flow is not heard,
notify organizational maintenance.
(19) Release parking brake (9).
WARNING
Do not back up without assistance of a ground guide. Failure to
do this will result in damage to vehicle, injury, or death.
(20) Slowly back tractor under semitrailer until fifth wheel coupling jaws (12) are
securely locked around semitrailer kingpin (13).
(21) Apply parking brake (9).
(22) Make sure locking plunger lever (10) is in rearward (locked) position, and
locking plunger safety latch (11) is in vertical position.
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