TM 9-2320-272-24-1
1-23. COMPRESSED AIR AND BRAKE SYSTEM OPERATION (Contd)
Key Item and Function
A WINDSHIELD WIPER CONTROL SWITCH - Opens air pressure valve in wiper motor to operate
wipers.
B WINDSHIELD WIPER MOTOR - Air-actuated motor powers windshield wipers.
C WINDSHIELD WASHER CONTROL - Spring-loaded valve that allows air pressure to force
washer fluid from washer reservoir to windshield.
D WINDSHIELD WASHER RESERVOIR - Container for windshield washer fluid.
E ACCESSORY MANIFOLD - Receives air pressure from the pressure protection valve and
distributes it to the various accessories.
F FRONT-WHEEL DRIVE LOCK-IN SWITCH - Air-actuated switch that engages front-wheel drive
when transfer case is in HIGH.
G WINDSHIELD WASHER NOZZLES - Direct washer fluid on windshield.
H GOVERNOR - Serves as a tee between accessory manifold and horn relay valve. It also signals the
air compressor to stop compressing air for the supply system when operating pressure has been
reached.
TRANSFER CASE AIR SHIFT CYLINDER - Engages front-wheel drive when it receives air
I
pressure from lock-in switch or engagement control valve.
J FRONT AXLE ENGAGEMENT CONTROL VALVE - Operates off cam, on transfer case shift
linkage so front-wheel drive engages automatically when transfer case is put into LOW.
relay, allowing air pressure to sound horns.
L HORNS - Receive air pressure from horn relay valve to sound off.
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