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TM 9-2320-270-10
INSTRUMENT PANEL CONTROLS AND INDICATORS - CONTINUED
KEY
5
6
CONTROL OR INDICATOR
FUNCTION/USE
TRAILER AIR SUPPLY CONTROL
Supplies air to trailer air reservoirs. Push in
to supply air to (charge) trailer reservoirs;
pull out to shut off air to trailer. If tractor
air system pressure drops to 65 psi (35.9
kPa) the trailer air supply valve will trip, ful-
ly applying trailer spring brakes.
WARNING
Loss of pressure can drop pusher axle while in up position.
PUSHER AXLE AIR PRESSURE
LOAD CONTROL
7
PUSHER AXLE AIR PRESSURE
LOAD GAGE
8
PUSHER AXLE RAISE/LOWER
CONTROL
Adjusts air pressure load on pusher axle in
order to meet local highway regulations re-
garding maximum loads per axle. Move this
lever left to INFLATE position t0 increase
air load on pusher axle. Return lever to DE-
FLATE position to relieve air load on pusher
axle.
Indicates air pressure load (in psi) on pusher
axle. With full air pressure load on pusher
axle, this gage should register approximately
110 psi (755 kPa).
Activates air suspension to lower or raise
pusher axle. To lower pusher axle, rotate
knob counterclockwise to DOWN position.
To raise pusher axle, rotate knob clockwise
to UP position.
C h a n g e 4 2-5
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