Toro ProCore SR Series Service Manual page 113

F. Remove retaining ring (item 2), shim(s) (item 3)
and tapered bearing cup from gearbox housing.
G. Discard removed bearings.
6. Use a press to remove input shaft and bearings from
gearbox housing:
A. Remove oil seal (item 1) from gearbox housing
taking care to not damage seal bore in housing. Dis-
card oil seal.
NOTE: Shim set (item 4) is used to adjust input shaft
bearing pre--load. When removing input shaft, take
note of location and number of shims to assist in
gearbox assembly.
B. Remove retaining ring (item 10) and shim(s)
(item 4) from input shaft.
C. Press input shaft toward rear opening of gearbox
housing to remove shaft.
D. Remove outer bearing (item 23) from housing.
E. Using a press, remove inner bearing (item 22)
cone from input shaft and bearing cup from housing.
F. Discard removed bearings.
7. Disassemble axle tubes:
A. Remove oil seal (item 17) from axle tube taking
care to not damage seal bore in tube. Discard seal.
B. Remove retaining ring (item 16).
C. Press bearing (item 15) from axle tube. Discard
removed bearing.
D. Remove and discard O--ring (item 20) from inner
flange of axle tube.
8. Thoroughly clean and inspect all gearbox compo-
nents. Replace all worn or damaged parts.
Gearbox Assembly (Fig. 1)
1. Assemble axle tubes:
A. Press new bearing (item 15) into axle tube. Make
sure that bearing is pressed fully to shoulder in tube.
B. Install retaining ring (item 16). Make sure that re-
taining ring is fully seated in retainer groove.
C. Apply a light coating of grease on lips and OD of
new oil seal (item 17). Install new seal into axle tube.
Oil seal should be flush to slightly recessed into axle
tube bore.
D. Lightly grease and install new O--ring (item 20) to
inner flange of axle tube.
ProCore SR Series
ALIGNMENT
MARK
2. Install new bearings and input shaft into gearbox
housing:
A. Press inner bearing (item 22) cone fully onto input
shaft.
B. Press inner bearing (item 22) cup and outer bear-
ing (item 23) fully into gearbox housing bores.
C. Install input shaft into gearbox housing through
rear opening of housing.
D. Install the removed shim(s) (item 4) and retaining
ring (item 10) onto input shaft. If necessary, remove
or add shims so that the shim(s) fit tightly between
the retaining ring and outer bearing. Make sure that
retaining ring is fully seated in shaft groove and that
there is no endplay in input shaft assembly.
IMPORTANT: Before installing output shaft into
gearbox housing, input shaft bearing pre- -load
must be checked and, if necessary, adjusted.
3. Check and adjust input shaft bearing pre--load:
A. Use a piece of string and a spring scale to deter-
mine the resistance to rotate the input shaft. Wrap
the string around the input shaft and attach the
spring scale to the string end.
B. Once the input shaft is rotating, the resistance to
continue to rotate the shaft should be from 2 to 3 in--
lbs (0.23 to 0.34 N--m). Repeat this process a few
times until a consistent resistance is determined.
C. If rotating resistance is below 2 in--lb (0.23 N--m),
add additional shim(s) behind the retaining ring (item
10). If resistance is above 3 in--lb (0.34 N--m), re-
move shim(s) from behind the retaining ring.
D. Retest rotating resistance after adding or remov-
ing shims.
E. Continue shim placement until input shaft rotat-
ing resistance is consistently from 2 to 3 in--lbs (0.23
to 0.34 N--m).
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Figure 2
Gearbox Service