5-56 673831-Rev A
HYDROSTATIC POWER TRAIN
5
Motor Assembly
Inspect all parts for cracks, nicks, burrs, and
excessive wear during assembly. Damage or
excessive wear to certain wheel motor components
other than seal kit components (2, 5, 7–9, 11, 15–17,
19, 21–24, 29, 31, 33–34, and 42–44) may require
wheel motor replacement.
1. Position bearing support (4) with motor shaft mating
face seated on a flat surface.
2. Remove the spring from new radial lip seal (5).
3. Using the shaft seal installation tool and a soft-faced
hammer, install new radial lip seal (5) in bearing
support (4).
4. Reinstall the radial lip seal spring.
5. Using the inner roller bearing—outer race installation
tool and a soft-faced hammer, install the outer race of
roller bearing (6) in bearing support (4) up to the
stop.
6. Position bearing support (4) with cam ring mating
face seated on a flat surface.
7. Using the outer roller bearing—outer race installation
tool and a soft-faced hammer, install the outer race of
roller bearing (3) in bearing support (4) up to the
stop.
8. Lubricate the outer race of roller bearing (3) and the
lips of radial lip seal (5) with Mobilux EP2 grease or
equivalent NLGI Grade EP2 grease.
9. Lubricate outer roller bearing (3) and inner race with
Mobilux EP2 grease or equivalent NLGI Grade EP2
grease.
10. Using the outer roller bearing—inner race installation
tool and a soft-faced hammer, install outer roller
bearing (3) and inner race in outer roller bearing
outer race.
11. Install new environmental seal (2) with lips facing out.
12. Lubricate lips of environmental seal (2) with Mobilux
EP2 grease or equivalent NLGI Grade EP2 grease.
13. Position motor shaft (1) under a press to avoid any
force on the studs.
14. Using a press, install bearing support (4) on motor
shaft (1).
15. Using the inner roller bearing—inner race installation
tool and a press, install inner roller bearing (6) and
inner race in inner roller bearing outer race. Do not
exceed 12,364 lb force.
16. Install shim spacer (7) of correct thickness as noted
during removal.
17. Install snap ring (8).
Figure 5-60
18. Check bearing support rotation torque as follows:
a. Install and tighten one screw (41) in bearing
support (4) mounting hole.
b. Position bearing support assembly under a press
to avoid any force on the studs.
c. Install a dial torque wrench (46) on screw (41).
d. Measure and record distance (R) from center of
motor shaft to center of screw (41).
e. Measure and record distance (L) from center of
screw (41) to point on torque wrench handle
where hand force is applied.
• It is important that all component parts are
absolutely clean, as contamination can result
in serious damage and/or improper operation.
• Never use shop towels or rags to dry parts
after cleaning, as lint may clog passages. Dry
parts using compressed air.
Required Materials
• Service Kits and Components (Refer to “Parts and
Maintenance Manual” for part numbers.)
•Loctite
®
638 Retaining Compound
•Loctite
®
7471 Activator
• Mobilux EP2 Grease
41
46
4
6
F
RL
CCm
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