TM 9-2320-272-24-1
1-14 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Contd)
Item and Function
Key
2
POWER TAKEOFF (PTO) SPRING BRAKE OVERRIDE SWITCH - Used during rear winch
self-recovery operations of M936/A1/A2 model vehicles only. This air control switch must be held in to
override spring brake air dump switch on transfer case PTO lever.
INSTRUMENT PANEL - Houses controls and indicators.
3
4
TRANSMISSION SELECTOR LEVER - Manual control to select driving gear.
SPRING BRAKE OVERRIDE SWITCH - Pressed in to release spring brakes independent of the
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mechanical parking brake for tests and adjustments. Can be used to release spring brakes in the
event a leak or stoppage occurs in lines between primary and spring brake reservoirs, or primary
system air shutoff valve is closed.
6
TRANSMISSION POWER TAKEOFF (PTO) LEVER - Used on M925/A1/A2, M928/A1/A2,
M929/A1/A2, M930/A1/A2, M932/A1/A2, and M936/A1/A2 model vehicles only. Provides hydraulic
power for front winch and/or dump body operation.
7
WINCH CONTROL LEVER - Provides control of winch unwinding and winding operations from
inside the cab.
8
TRANSFER CASE SHIFT LEVER SWITCH - Used in conjunction with transmission selector
lever in NEUTRAL position to allow transfer case to be shifted between HIGH and LOW gears.
9
PASSENGER SEAT - Combination two-person crew seat, battery box, and storage box. Seats are
equipped with two sets of seatbelts, the battery box houses four batteries, and the storage
compartment stores technical manuals. NOTE: Ensure companion seatbelts are not caught inside
battery box.
TRANSFER CASE SHIFT LEVER - Pushed down to shift transfer case into HIGH gear, center
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position for NEUTRAL, and up position for LOW gear. When transfer case is placed in LOW, it will
automatically engage six-wheel drive. In HIGH, the instrument panel-mounted front-wheel drive
lock-in switch must be used to achieve six-wheel drive operation.
SPRING BRAKE CONTROL SWITCH - Senses the position of the parking brake control lever and
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signals the spring brakes to engage when the lever is up and disengage when it is down. Spring
brakes can be tested independently from parking brake by raising this switch without pulling up the
parking brake control lever (TM 9-2320-272-10).
12
(a) DUMP BODY CONTROL LEVER - Used on M929/A1/A2 and M930/A1/A2 to control raising
(pulled back) and lowering (pushed forward) of dump body.
(b) TRANSFER CASE POWER TAKEOFF (PTO) - Used on M936/A1/A2 to control the hydraulic
pump that delivers hydraulic pressure to the rear winch and crane. A spring brake air dump switch
is installed on the lever when used on these vehicles, which engages the spring brakes. To override
this feature during self-recovery operation with the rear winch, the driver must depress and hold the
PTO spring brake override air switch on the instrument panel.
13
DUMP BODY CONTROL LEVER SAFETY LATCH - Secures dump body control lever or transfer
case PTO in NEUTRAL when not in use.
14
FUEL TANK SELECTOR LEVER - Used on dual tank model vehicles only. NOTE: Tanks must be
switched periodically to lessen the buildup of contaminants and fungus.
15
PARKING BRAKE CONTROL LEVER - Pulled up to set mechanical brake on output of transfer
case and to engage the spring brakes, and down to disengage brakes. Knob on top of handle is turned
clockwise to increase braking action on the output of transfer case, and counterclockwise to decrease
braking action. Spring brakes engagement is controlled by the spring brake control switch located on
the back of the lever.
ACCELERATOR PEDAL - Foot control to vary the speed of the engine.
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17
BRAKE PEDAL -Applies the service brakes.
DIMMER SWITCH - Depressed to change between HIGH and LOW beam setting on headlights.
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FUEL GAUGE TANK SELECTOR SWITCH - Used to switch fuel gauge to read either left or right
fuel tank. Installed only on dual tank model vehicles.
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