Toro 30827 Operator's Manual page 15

1
2
4
Figure 15
1. Rear roller
2. Scraper
Seal Removal
Using a 1/4 in. thick, 3 in. x 3 in. square piece of steel and
the following specifications, make a seal removal tool
(Fig. 16).
.625 in.
.625 in.
1.05
1.05
in.
in.
Figure 16
1. Slide seal tool over roller shaft.
2. Using the tool as a template, locate, mark, and drill 2
holes (7/64 in. [.109 in.] diameter) in outer face of seal.
3. Screw 2 self-tapping screws (No. 8 [.164 in.] x 3/4 in.)
into outer face of seal.
4. Install 2 capscrews (1/4 x 1 in.) into seal tool.
3
m–5417
3. Roller mount
4. Lower screw
.188 in. dia. (2)
.625 in. dia.
1/4–20 UNC (2)
15
1
Figure 17
1. Roller
2. Roller shaft
3. Ball bearing
5. Alternate tightening sequence of 1/4 in. capscrews to
pull seal out of housing.
Note: Seal will be destroyed when servicing the rear roller.
Do not attempt to re-use these seals.
Bearing Removal
Reference: The bearings are pressed on to the shaft
(.0003–.0016 in. interference) and loose fit to housing
(.0020–.0035 in. clearance).
1. Remove retaining ring (Fig. 17). Repeat on other end.
2. Loosely secure roller assembly in bench vise and lightly
tap one end of roller shaft until free from housing.
3. Remove second bearing from shaft. Support bearing on
inner race and tap on roller shaft.
4. Inspect bearings, shaft, and retaining ring for damage.
Replace damaged components. Re-assemble roller.
Assembly
1. Press bearing onto one end of shaft. Apply pressure to
inner race only.
2. Install spiral retaining ring on same end as assembled
bearing.
3. Install shaft with single bearing into tube assembly.
4. Install second bearing into roller assembly. Press only
on inner race. The inner race will contact shoulder of
shaft before outer race contacts shoulder of housing.
5. Install second spiral retaining ring.
6. Partially fill cavity between bearing and seal with
grease, prior to installation of new seals, to prevent
contamination.
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3
4
5
4. Retaining ring
5. Oil seal