TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 103 of 926
TM 9-2320-283-20-1
PRINCIPLES OF OPERATION.
1-21.
AUXILIARY AIR-POWERED SYSTEMS.
a.
Windshield Wipers and Washers.
WIPER CONTROL VALVE.
In OFF position, valve directs air from supply line to park line.
When pulled out, it diverts air
to wiper line.
By turning clockwise (LOW) or counterclockwise (HIGH), desired speed is selected.
To park wipers, turn
valve to center position and push in.
WASHER CONTROL VALVE.
When button is pushed, air flows from manifold to reservoir.
WIPER SUPPLY LINE.
Carries air for wiper system from manifold to control knob.
WASHER AIR SUPPLY LINE.
Carries air from manifold to control button.
COMPRESSED AIR SUPPLY MANIFOLD.
Supplies compressed air to washer and wiper through supply lines.
WIPER ARM.
Connects wiper blade to linkage.
Moved by motor.
WIPER BLADE.
Actuated by wiper arm to clear windshield of water.
RESERVOIR FILLER CAP.
Filter underneath cap prevents dirt from entering system.
Cap closes firmly to maintain
pressure in system.
WASHER FLUID RESERVOIR.
Holds supply of washer fluid.
RESERVOIR AIR LINE.
Carries pressurized air from button to reservoir when pressure forces fluid into washer hose.
PARK AIR LINE.
When knob is pushed into PARK position, air flows through park line to motor, causing wiper blades to
move down to REST position.
WIPER AIR LINE.
When knob is in WIPE position, air flows through wiper line to motor, starting wiper blades in motion.
WIPER MOTOR.
Air-powered motor turns wipers back and forth when air comes from wiper line, or moves them down
windshield to PARK position when air comes through park line.
WIPER LINKAGE.
Linkage from motor actuates two wiper arms.
1-82
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