TM-9-2320-285-10
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; OPERATOR’S MANUAL
JUNE 1985
TM-9-2320-285-10 - Page 9 of 121
TM 9-2320-285-10
1-8.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Continued)
Electrical System - 12 volt.
Includes four wet-cell batteries, wiring harnesses, and electrical components.
Winterization System - Consists of accessory heater systems for cold-weather operation.
Front Axle - I-beam type steerable axle.
Rear Axle - Heavy duty double-reduction drive unit.
Fifth Wheel Hydraulic System - Includes hydraulic reservoir bolted to chassis directly behind fuel tank, hydraulic pump, and
fifth wheel.
Frame - Two heavy duty flange beams extending the length of the tractor.
Air System - Includes air compressor, two air reservoirs consisting of a service tank and a supply tank, and warning buzzer
and light.
Steering System - Includes steering wheel and column connected at cab floor to steering gear; hydraulic power assisted.
Cooling System - Includes radiator, fan, and water pump.
Fuel System - Includes vented fuel tank mounted to left side of frame, mechanical gear pump, fuel filters, fuel injectors,
connecting tubing and fittings, and air cleaner and precleaner.
1-4
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