TM 5-3895-359-14&P
SUBSECTION 5 REAR AXLE ASSEMBLY AND FINAL DRIVE
1. Raise and support the rear of machine
GENERAL
with a dolly or suitable support under the
The rear axle assembly is a single unit type, with
rear section of machine frame, so the tires
attached two-speed nose box and planetary final wheel
clear the surface. Lower hydraulic crane
reduction drives. Tapered roll bearings are used at all
completely.
bearing locations except drive pinion shaft end bearing
2. Drain the lubricant from the axle and final
and differential pinion gears. A straight roller bearing is
drives.
used on the end of drive pinion shaft. A plain type
3. Remove the rear wheels and tires from
bearing formed by spider and pinion surfaces is used on
machine.
all differential pinions.
4. Remove the left rear fender.
PREPARE FOR REMOVAL
5. Remove the four bolts and nuts holding
Completely assembled axles may be steam cleaned on
left axle shaft housing to machine frame.
the outside only, to facilitate initial removal and
6. Remove left wheel hydraulic brake line at
disassembly, providing all openings are closed.
wheel cylinder.
Breathers, vented shift units, and all other openings
7. Remove eight nuts and lock washers from
should be tightly covered or closed to prevent the
axle housing flange side of final drive
possibility of water entering the assembly.
case cover, left and right side and remove
REMOVAL
final drive and axle shaft assemblies.
There are two types of repair procedures for rear axle
8. Insert a pipe or shaft slightly smaller in
unit assembly. One requires the complete removal of
diameter than the splined shaft end of the
the rear axle from the machine, while the other only
axle shaft about 1.5" diameter and about
requires a removal of the cover half or left section of the
6 feet long through axle shaft housing and
unit. It is recommended that the easier of the two
into differential carrier from the housing
removals be attempted and after inspection of parts
(right side) side of axle. This is to support
removed, the entire unit removal can be decided upon.
the differential assembly when the axle
a. Complete Rear Axle Removal
cover side (left side) is removed.
1. Raise and support the rear of machine
9. Remove the bolts and nuts and two cap
with a dolly or a support under the rear
screws holding the two axle housings
section of machine frame so the tires
together.
clear the surface. Lower the hydraulic
10. Separate the two housings and remove
crane completely.
the cover, (left) housing from machine.
2. Drain the lubricant from rear axle
11. With the pipe or shaft previously installed
assembly including final drives.
to support the differential assembly,
3. Remove the rear wheels and tires from
remove same.
machine.
12. The installation is reverse of above
4. Remove the rear fenders.
procedure. Use new gaskets at axle
5. From above, remove the operator's
housing halves and between axle shaft
platform and fuel tank tool box assembly.
housing and final drive.
6. Remove hydrostatic motor from nose box.
c. Final drive disassembly and repair procedures.
7. Disconnect the hydraulic brake lines at
PREPARE FOR DISASSEMBLY
the wheel cylinders.
Before starting the disassembly of the axle, the following
8. Remove the four "U" bolts holding rear
procedure and precautions should be taken:
axle to machine frame. Disconnect shift
a. Jack up both ends of axle so that tires clear the
linkage at the nose box. Also remove
ground. Due to the extreme weight of vehicles
nose box hold-down bolts holding nose
under which planetary type axles are used, the
box to cross member.
axle should then be blocked up under each
9. Attach an overhead crane with chain sling
spring seat to safely support the weight and hold
to rear axle assembly.
axle at this level. The jacks may then be
10. With the use of a chain hoist, lift and
removed to provide adequate working space
manipulate axle from frame.
with no danger of axle end falling or shifting.
11. The installation is the reverse of above
b. Remove the wheel nuts.
procedure.
c. Remove the tire and wheel.
b. Removal of rear axle assembly left section or
d. Rotate hub assembly so that the drain plug is at
cover half. (For repairs not involving ring gear
the bottom.
and pinion.)
e. Remove the plug and drain lubricant.
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