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 TM 9-2320-312-10
DESCRIPTION AND USE OF OPERATOR'S CONTROLS AND INDICATORS - CONTINUED
0004 00
INSTRUMENT PANEL - CONTINUED
32
31
30
29
33
28
34
35
KEY
CONTROL OR INDICATOR
FUNCTION
28
Load Sensing Gauge
Indicates kingpin weight of trailer on fifth wheel. Weight must not
exceed 70,000 lb (31,751 kg) vertical load capacity.
29
Fifth Wheel Lift Control
With engine running and transmission in any range, move lever to
UP position to raise fifth wheel, to DN position to lower fifth
wheel.
30
Transmission Range Selector Lever
Lever shifts automatic transmission. Positions are R (Reverse), N
(Neutral), D (Drive), and specific drive gear ranges: 4; 3; 2; and
1. R (Reverse) also activates backup lights, floodlights, and a
backup alarm. Refer to Transmission Range Selector Lever on
31
Air Pressure Gauge
Two-needle (green and orange) gauge indicates air pressure in
primary and secondary brake systems. Pressure should range
between 85-130 psi (586-896 kPa). If pressure is below 65 psi (448
kPa), warning buzzer sounds and warning light comes on.
32
Trailer Brake Control Valve
Applies trailer service brakes without applying tractor service
brakes. Pull lever down to apply trailer brakes. Push lever up to
release trailer brakes. DO NOT use lever as a trailer parking brake.
33
Parking Brake Control
Yellow diamond-shaped knob operates tractor parking brake
valve. Pull out to apply parking brake, push in to release.
34
Fifth Wheel Lock Control
Move lever left to unlock fifth wheel coupler jaws. Lever
automatically returns to right (lock) position when released.
35
Trailer Air Supply Control
Red octagonal-shaped knob supplies air to trailer air reservoirs.
Push in to charge trailer air supply and release trailer parking
(spring) brakes. Pull out to shut off air supply and apply trailer
parking (spring) brakes.
0004 00-5
Change 1
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