5.
Install a new stake washer. Install the lock nut finger
tight.
6.
Setthebearingpreloadbysecuringthebearingcase
in a vise. Thread a M12 x 1.5 hex head cap screw into
the splined end of the input shaft/pinion gear and slowly
tighten the lock nut until 4 to 6 in-lb (0.4 to 0.7 N--m) of
force is required to rotate the input shaft/pinion gear in
the bearing case.
0.040 in. (1.0 mm)
1
2
7.
8.
end face of the input shaft/pinion gear to the mating sur-
face of the bearing case. Subtract the “Design Cone
Center Distance” from this distance to determine initial
shim thickness (Fig. 30).
Secure the lock nut with the stake washer.
Use a depth gauge to measure the distance from the
3
Figure 29
1.
2.
Oil seal
Bearing case
3.
Seal garter spring
DESIGN CONE CENTER DISTANCE
(distance from mating surface of axle support to end
face of pinion gear):
1.870
+ 0.002 in. (47.5 + 0.05 mm)
1
NOTE: Bearing case shims are available in 0.004 in.
Design
Cone Center
Distance
(0.1
mm) and 0.008 in. (0.2 mm) thickness.
9.
Coat new O-rings with grease and install the bearing
caseinthegear case.Placeshims onthegear caseand
temporarily install gear case assembly into axle case.
Tighten mounting nuts and screws from 35 to 41 ft-lb
2
(47
to 56 N--m).
10.Insert
a screwdriver through the drain plug hole to
hold ring gear and measure the pinion gear to ring gear
backlash (Fig. 31).
Figure 30
PINION GEAR TO RING GEAR BACKLASH:
1.
Input shaft/pinion gear
2.
Bearing case
0.004
to 0.016 in. (0.10 to 0.40 mm)
11.
Adjust backlash by increasing or reducing gear case
shim thickness.
12.Check
piniongeartoringgearengagement(seePin-
1
ion Gearto RingGear Engagement in thissection ofthis
manual).
13.Place
case. Tighten mounting nuts and screws from 35 to 41
ft-lb (47 to 56 N--m).
the correct combination of shims on the gear
3
2
14.Install
pinion gear.
retaining rings and driven gear on input shaft/
4
15.If
the drive gear (on drive motor shaft) was removed,
install the retaining rings and drive gear on the motor
shaft.
Figure 31
1.
2.
Axle case
Screwdriver
3.
4.
Dial indicator
Input shaft/pinion gear
16.Use
a new gasket and install the cover plate. Use a
new O-ring and install the drive motor.
Groundsmaster 4500--D/4700--D
Page 6 -- 25
Axles, Planetaries and Brakes
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| Document Type | Service Manual |
| Language | English |
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