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Figure 61. Key bearing parts.
Figure 60. Bearing-block grease grove and
grease port.
7. Remove any metal or abrasives trapped in the
bearing grease groove and grease port, or
contaminants will be pumped into the new
bearing when you lubricate it, causing bearing
failure. Figure 60.
8. Clean and inspect the bearing-block for cracks,
burrs, wear, and other damage; replace/repair
as required.
The “bearing race” should rotate inside of the
“bearing block” smoothly. If the race is loose
or wobbles inside of the bearing block,
replace the bearing block. See Figure 61.
9. Insert the new bearing into the bearing-block
so when the bearing block is installed in the
sander, the grease zerk is facing forward and
the set screws and hub are on the right-side of
the bearing housing. See Figures 57 and 61.
10. Slide (DO NOT hammer) the bearing block
and bearing onto the drum shaft.
11. Lower the drum and bearing-block onto the
mounting studs, and install the flat washers
and the nuts. Tighten the nuts in an
alternating pattern until snug.
12. Install and tighten the set screws.
13. Wipe the zerk fitting clean, and lubricate
the bearing with just enough grease to
slightly seep from the dust seal and wipe
clean (these bearings are not pre-
lubricated). DO NOT over-grease.
14. Repeat Steps 3 through 13 on all other
bearings that need replacement. Always
replace both bearings on the same drum.
15. Adjust the Drums and Pressure Rollers as
outlined in the Adjustments section, on
Page 14.
NOTICE
Make sure the bearing grease hole in the
bearing lines up with the grease groove in the
bearing block and that no obstructions
prevent bearing lubrication.
Bearing
Block
Grease
Groove
Bearing
Grease
Port
Set
Screw
Guide
Pin
Bearing
Race
Hub
Grease Port
MAINTENANCE