Toro 30821 Service Manual page 119

IMPORTANT: Note position of the open and closed
side of the wear plates before removing. Also, iden-
tify wear plates (front and rear) with a marker for
proper assembly.
8. Carefully remove rear wear plate, idler gear, drive
gear, and front wear plate from the front plate.
9. Remove and discard back- up gaskets and pressure
seals from wear plates.
10.Turn front plate over, with seal side up, and remove
the retaining ring using snap ring pliers.
IMPORTANT: Make sure not to damage the counter
bore when removing the shaft seal from the front
plate.
11. Remove and discard shaft seal from the front plate.
Inspection
1. Remove any nicks and burrs from all parts with
emery cloth.
CAUTION
Use eye protection such as goggles when using
compressed air.
2. Clean all parts with solvent. Dry all parts with com-
pressed air.
3. Inspect drive gears and idler gears for the following
(Fig. 88):
A. Drive gear shaft spline should be free of twisted or
broken teeth.
B. Gear shafts should be free of rough surfaces and
excessive wear at bushing points and sealing areas.
Scoring, rough surfaces, or wear on gear shafts indi-
cates need for replacement.
C. Gear teeth should be free of excessive scoring
and wear. Any broken or nicked gear teeth must be
replaced.
D. Inspect gear face edge for sharpness. Sharp
edges of gears will mill into wear plates and, thus,
must be replaced.
4. Inspect wear plates for the following:
A. Bearing areas should not have excessive wear or
scoring.
B. Face of wear plates that are in contact with gears
should be free of wear, roughness or scoring.
Groundsmaster 3500- D
C. Thickness of wear plates should be equal.
5. Inspect front plate and back plate for damage or
wear.
1
1. Gear shaft spline
2. Gear shaft
Assembly (Fig. 86)
Note: When assembling the motor, check the marker
line on each part to make sure the parts are properly
aligned during assembly.
1. Lubricate O- rings, pressure seals, back- up gas-
kets, and wear plate groves with a thin coat of petroleum
jelly. Lubricate all other internal parts freely with clean
hydraulic oil.
2. Install new shaft seal in front plate with seal part num-
ber facing out. Seal should be pressed into place until it
reaches the bottom of the bore.
3. Install retaining ring into the groove of the front plate.
4. Place front plate, shaft seal side down, on a flat sur-
face.
5. Install the pressure seals, flat side outward, into the
grooves in the wear plates. Follow by carefully placing
the backup gaskets, flat side outward, between the
pressure seals and the grooves in the wear plate.
6. Apply a light coating of petroleum jelly to the exposed
side of the front plate.
7. Lubricate the drive gear shaft with clean hydraulic oil.
Insert the drive end of the drive shaft through the wear
plate with the pressure seal side down and the open side
of the pressure seal pointing to the inlet side of the mo-
tor. Carefully install shaft into front plate.
8. Lubricate the idler gear shaft with clean hydraulic oil.
Install idler gear shaft into the remaining position in the
wear plate. Apply a light coating of clean hydraulic oil to
gear faces.
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3
2
4
Figure 88
3. Gear teeth
4. Gear face edge
Hydraulic System (Rev. G)