TM 55-1730-229-34
AG 320A0-MME-000
TO 35 C2-3-473-2
TM 1730-34/1
CHAPTER 10
MAINTENANCE OF PROPULSION SYSTEM
10-1. GENERAL.
The propulsion system,
roller bearing supports.
The pinion
shaft and gear are assembled in a pinion
retainer that is bolted to the carrier
major components/assemblies:
housing. Two carrier and differential
cases are used to accommodate the two
Front axle assembly
Tow bar assembly
The ring gear is bolted to the differen-
Speed/direction control assembly
tial case with 7/16 x 2-inch bolts.
Motor controller
Right and left axle shafts are not in-
Traction motor
terchangeable since the right shaft is
Gear drive assembly
shorter than the left. The axle assembly
Chain drive assembly
provides AGPU drive and braking capabi-
Clutch assembly
lities. The axle assembly is mounted to
Rear axle assembly
the AGPU by two leaf springs that are
Brake assembly
identical to the springs used on the
front axle. The springs allow approxima-
a. Front Axle Assembly/Tow Bar As-
tely 3 inches of suspension travel. The
rear
provides approximately 7
axle
axle is a solid-beam, kingpin type as-
inches of ground clearance at lowest
sembly. It is composed of a center axle
point. The rear axle flanged input shaft
mates to the remainder of the drive sys-
beam, two kingpin supported spindle as-
tem, consisting of the chain drive and
semblies mounting roller bearing wheel
tow bar assembly,
gear drive assemblies and the traction
hubs/wheels/tires,
motor. Braking is accomplished by rear
tierod assembly, and a tow bar mounted
speed/direction control assembly. The
wheel mounted drum-type brake assemblies
that are actuated by an operator con-
front axle assembly supports the AGPU by
trolled lever and cable assembly.
two multi-leaf springs that allow appro-
ximately 3 inches of suspension travel.
The tow
bar assembly provides AGPU
steering/towing and allows the unit to
turn in a diameter of approximately 21
The electric brake consists of a
feet. The axle assembly provides appro-
ximately 12 inches of ground clearance.
spring-loaded flapper applies pressure
to the brake assembly braking the rotor
b. Rear Axle Assembly.
The rear axle is a solid banjo-
is applied to the brake coil, a magnetic
housing hypoid assembly containing a
field lifts the flapper against spring
differential gear assembly with a 4.88:1
pinion is
pressure compressing the springs and
The drive
drive ratio.
releasing the electric brake.
straddle-mounted in two opposed tapered
10-1
Change 2