TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 59 of 1207
TM 9-2320-361-20
1-19. POWER SYSTEMS OPERATION
The power system includes those components that give all vehicles covered in this manual the power to
move. Each of these components will be described as part of the following subsystems:
a.
b.
c.
d.
e.
f.
Powertrain System Operation (page 1-46).
Engine Oil System Operation (page 1-48).
Fuel System Operation (page 1-50).
Air Intake System Operation (page 1-52).
Exhaust System Operation (page 1-53).
Cooling System Operation (page 1-54).
a. Powertrain System Operation.
The powertrain system is the same on all models covered in this manual with the exception of the long
wheel base models which have an additional propeller shaft and center bearing. The powertrain transmits
engine power throughout the vehicle to put it in motion. Major components of the powertrain are:
ENGINE
- Provides mechanical power for powertrain component operation.
TRANSMISSION
- Transfers engine power to meet different speeds and power requirements.
TRANSFER CASE
- Distributes power to front and rear axles.
UNIVERSAL JOINTS
- Permit power to be transmitted at slight angles between transmission and
transfer case and between transfer case and differentials.
DIFFERENTIALS
- Distribute power to left and right axle shafts independently.
AXLES
- Transmit power from differentials to wheels.
PROPELLER SHAFTS
- Drive shafts that transmit power from the transmission to the transfer
case, to the differentials.
1. Front differential to transfer case propeller shaft
2. Transmission to transfer case propeller shaft
3. Transfer case to forward-rear differential propeller shaft
4. Forward-rear differential to rear-rear differential propeller shaft
1-46
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