Use and Care Manual

22
Rotating Drum Bearings
Bearings should be replaced when they allow
excessive play of the drum, make excessive noise
or otherwise indicate failure.
If clicking noises in the bearings are a problem,
rotating may be a solution instead of replacement,
as follows:
1. Unplug sander from power source.
2. Loosen the set-screws in the bearing collar
(Figure 33). Leave the set-screw wrench in one
of the set-screws. Then rotate the drum within
the bearing and tighten the set-screws.
3. If the clicking persists, or if the drum shaft is
tight in the bearing and cannot rotate, then
loosen the bearing bolts. Repeat step 2. After
the drum is rotated within the bearing, tighten
the bearing bolts first and then the set-screws.
4. After the machine has run for about 30
minutes, stop to check that the set-screws and
bearing bolts are still tight.
Note: It may be necessary to re-align the tension
rollers after rotating the drum bearings. See
Conveyor Belt Tension and Tracking on page 19.
Replacing Drum Bearings
If the bearings are squealing or are loose, they may
need replacing.
1. Unplug sander from power source and remove
dust cover.
2. Raise conveyor table until the sanding drum
rests on the conveyor.
3. Outboard: Remove the two knobs and washers
that are holding the bearing in place. Loosen
the two set-screws in the bearing collar and
slide the bearing off the end of the drum
(Figure 34).
4. Install a new bearing on the shaft of the drum
and tighten the bolts. Tighten the set-screws in
the bearing collar. Make sure the bolts go
through the drum shield and tension roller
support brackets (see exploded view, page 37).
5. Inboard: Remove outer half of belt guard by
removing the six #10-32 screws in the guard.
Slide the belt guard away from the v-belt.
6. Release v-belt tension by loosening pinch bolt
in motor support and raising motor.
7. Loosen the set-screw in the driven pulley and
remove the pulley from the shaft.
8. Remove the bolts holding the inboard (right)
bearing in place (Figure 35). Slide the inner half
of the upper belt guard off the end of the shaft
along with the bearing.
9. Install the new bearing on the shaft and install
the inner half of the upper belt guard in the
same manner as it was removed. Make sure
Figure 32
Figure 33
Figure 34