TM 9-2320-269-20-1
Section III. PRINCIPLES OF OPERATION
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Airbrake System ..............................................
Fuel System ................................................
Cooling System ...............................................
Hydraulic System ........................................
Electrical System .............................................
Power Train System ....................................
Exhaust System ...............................................
Steering System ..........................................
POWER TRAIN SYSTEM
GENERAL
The power train system provides and uses power for moving the M876 Truck and supplies power to the hydraulic system.
It consists of the engine, torque converter, transmission, power takeoff, propeller shafts, power divider, and tandem rear
axles.
ENGINE
The engine is a four stroke, naturally aspirated internal combustion diesel engine. It has an overhead valve, V-type engine,
and depends on the heat of compression to burn the diesel fuel. Fuel flow and engine speed are controlled by the fuel
injection pump, governor, and fuel injectors.
TORQUE CONVERTER
The torque converter links the engine to the transmission. It multiplies the engine power to the transmission when driven.
TRANSMISSION
The automatic transmission has four forward speeds, one reverse speed, and a neutral (N) position. It uses hydraulic oil
under pressure to make speed and direction changes.
POWER TAKEOFF
The power takeoff is mounted on the side of the transmission and is engaged by a sliding gear. It transfers power from the
transmission to the hydraulic system oil pump when engaged.
TA228528
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