Service manual

Rev. A
Groundsmaster 3280−D/3320Cutting Units
Page 10 − 10
Blade Spindle Service
Disassembly (Fig. 4)
1. Loosen and remove lock nut from top of spindle
shaft.
NOTE: Early production spindle assemblies included a
v−ring seal (item 4) which has been found to be unnec-
essary. Discard v−ring seal if found in spindle assembly.
2. Remove flat washer and pulley from shaft. If spindle
is equipped with a v−ring seal, remove and discard v−
ring seal.
3. Remove the spindle shaft from the spindle housing
which may require the use of an arbor press. The spindle
shaft spacer should remain on the spindle shaft as the
shaft is being removed.
4. Remove oil seals from spindle housing.
5. Allow the bearing cones, inner bearing spacer and
spacer ring to drop out of the spindle housing.
6. Using a punch and hammer, drive both of the bearing
cups out of the spindle housing. Remove the outer bear-
ing spacer from the housing.
7. The large snap ring can remain inside the spindle
housing. Removal of this snap ring is very difficult.
Assembly (Fig. 4)
NOTE: A replacement spindle bearing set contains two
(2) bearings, a spacer ring and a large snap ring (Fig. 5).
These parts cannot be purchased separately. A replace-
ment spacer set includes the inner spacer and outer
spacer.
IMPORTANT: If new bearings are installed into a
used spindle housing, it may not be necessary to re-
place the original large snap ring. If the original
snap ring is in good condition with no evidence of
damage (e.g. spun bearing), leave the snap ring in
the housing and discard the snap ring that comes
with the new bearings. If the large snap ring is found
to be damaged, replace the snap ring. Replacement
bearings are sold only with a matched spacer ring
and large snap ring (Fig. 5). These parts cannot be
purchased separately.
1. If large snap ring was removed from spindle housing,
install snap ring into housing groove. Make sure snap
ring is fully seated in housing groove.
2. Install outer bearing spacer into top of spindle hous-
ing. The spacer should fit against the snap ring.
1. Lock nut
2. Flat washer
3. Pulley
4. V−ring seal (if equipped)
5. O−ring
6. Oil seal
7. Bearing set
8. Spacer set
9. Spindle housing
10. Grease fitting
11. Shaft spacer
12. Spindle shaft
Figure 4
5
3
2
1
10
8
4
6
7
9
11
130 to 150 ft−lb
(176 to 203 N−m)
6
12
1. Bearing
2. Spacer ring
3. Large snap ring
4. Inner spacer
5. Outer spacer
Figure 5
4
1
1
2
3
5