Toro Groundsmaster 4500-D, Service Manual

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Groundsmaster 4500--D/4700--D Cutting Units (Rev. B) Page 8 -- 13
Rear Roller Service (Non--Greasable Bearings)
Seal Removal (Fig. 9)
1. Using a 1/4 inch thick, 3” X 3” square piece of steel,
make a seal removal tool as shown in Figure 10.
2. Slide seal removal tool over roller shaft.
3. Using the tool as a template, locate, mark, and drill
two 7/64 inch (.109 inch diameter) holes in outer face of
seal.
4. Screw two No. 8 (.164 inch diameter) by 3/4 inch long
self--tapping screws into outer face of seal.
5. Install two 1/4--20 by 1 inch long cap screws into seal
removal tool.
6. Alternately tighten cap screws to pull seal out of roller
assembly.
NOTE: Seals will be destroyed when servicing the rear
roller. Do not re--use seals that have been removed.
Bearing Removal (Fig. 9)
NOTE: The bearings are pressed onto the roller shaft
and loose fit into the roller.
1. Remove seals from roller. Remove retaining rings
from roller shaft: catch ring removal notch with pick and
pull ring from shaft.
2. Loosely secure roller assembly in bench vise and
lightly tap one end of roller shaft until free from bearing
and housing.
3. Remove second bearing from shaft by supporting
bearing on inner race and tapping on roller shaft.
4. Discard removed bearings. Inspect shaft, retaining
rings, and roller for damage. Replace components as
needed.
Roller Assembly (Fig. 9)
1. Press new bearing onto one end of roller shaft. Apply
pressure equally to inner and outer bearing races.
2. Place spiral retaining ring on same end of shaft as
installed bearing.
3. Install shaft with single bearing into roller.
4. Install second new bearing onto roller shaft. Apply
pressure equally to inner and outer bearing races. The
inner race will contact shoulder of shaft before outer
race contacts shoulder of roller.
5. Install second spiral retaining ring onto roller shaft to
secure second bearing.
6. Install new seals to .030 inch (.76 mm) recessed into
roller.
1. Roller
2. Roller shaft
3. Bearing
4. Retaining ring
5. Oil seal
Figure 9
5
4
3
2
1
Figure 10
.625”
.625”
1.05” 1.05”
.188” dia. (2)
.625” dia.
UNC (2)
Tap 1/4--20
Cutting
Units