Toro Groundsmaster 455-D Service Manual page 131

Inspection of Rear Axle 4WD Motor Parts
1. Wash all parts thoroughly in a suitable solvent.
2. Examine needle bearings (Item 4) and (Item 7) in
housing and back plate. Make sure they are free of
excessive play and remain in the bearing cage. If needle
bearings are damaged, housing (Item 6) or back plate
(Item 2) should be replaced (bearings are not available
separately).
3. Inspect thrust races (Item 9) and thrust bearing
(Item 10). All surfaces should be free of any signs of
wear or fretting.
4. Inspect spider and pivot of rotating assembly. Conical
surfaces should be free of wear and score marks.
5. Inspect the pistons. The O.D. surface should be
smooth and free of scoring. the shoes should be snug
fit to the piston. The face of the shoes should be flat and
free of scoring or flaking. DO NOT LAP SHOES on
pistons.
6. Inspect piston block. The bores should be free of
scoring. The surface that contacts the back plate should
be smooth and free of grooves or metal buildup. DO
NOT LAP PISTON BLOCK.
7. Inspect the camplate insert (Item 5). The surface
should show no signs of scoring or grooves.
8. Inspect the flat surface of the back plate (Item 2). The
surface should be free of excessive scoring or metal
build-up. DO NOT LAP BACK PLATE.
9. Inspect the drive shaft (Item 12) for fretting in the
bearing areas.
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Groundsmaster 455-D
Assembly of Rear Axle 4WD Motor Parts
1. Lubricate all moving parts with clean hydraulic oil
before assembly.
2. Install one retaining ring (Item 8) in rear groove of
drive shaft (Item 12). Install one thrust race (Item 9),
thrust bearing (Item 10) and second thrust race (Item 9)
on drive shaft. Install second retaining ring (Item 8) in
front groove on drive shaft.
3. Install shaft assembly in housing (Item 6) and install
spacer (Item 11).
4. Install retaining ring (Item 13).
5. Assemble rotating assembly (Item 14) by installing
pivot, spider and pistons in cylinder block.
6. Lubricate camplate insert (Item 5) and install in
housing.
7. Install rotating assembly (Item 14) in housing. The
piston shoes must contact the camplate insert (Item 5).
Make sure all parts in the proper position.
8. Install new o-ring (Item 3) on back plate (Item 2).
9. Install back plate on housing.
10. Install six (6) capscrews (Item 1) and tighten evenly
to a torque of 15 - 18 ft-lb.
Page 4 - 47 Repairs