TM-9-2320-285-24-1
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-1 - Page 21 of 987
TM 9-2320-285-24-1
1-23.
BRAKES (CONT)
8.
BRAKE CONTROLS.
Brake treadle valve controls operation of front and rear service brakes.
PARKING BRAKE
valve, located at right instrument panel, controls vehicle spring brakes.
With service and emergency hoses connected to
trailer, brake treadle valve also controls trailer service brakes; and, trailer hand brake control, located at right hand side of
steering column, applies trailer brakes without applying tractor brakes.
1-24.
WHEELS
1.
WHEEL.
Provides mount for tire and rim; all
same size.
2.
TIRE.
12:00 by 20, 16 ply pneumatic type.
1-25.
STEERING SYSTEM
1.
STEERING COLUMN.
Includes steering shaft;
provides mount for turn signal lever and light, steering
wheel, and horn button; connects steering wheel to
steering universal joint.
2.
POWER STEERING GEAR.
Includes hydraulic
control valve; driven by steering universal joint, drives
steering linkage using
arm.
3.
POWER STEERING PUMP.
Rotary vane type
pump forces hydraulic oil from power steering reservoir
to steering gear control valve to provide steering power
assist.
1-12
Back to Top
