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W1772/W1773 37" Drum Sander
SERVICE
5. Use a screwdriver to pry and rotate the bearing so it
is horizontal to the bearing-housing mounting flang
-
es, as shown in
Figure 43.
6. Slide the bearing out of the bearing housing, as
shown in
Figure 44.
7. Remove any metal or abrasives trapped in the bear-
ing grease groove and grease port (s
ee Figure 45),
or contaminants will be pumped into the new bear
-
ing when you lubricate it, causing bearing failure.
8. Clean and inspect the bearing-housing for cracks,
burrs, wear, and other damage; replace/repair as
required. The bearing race should rotate inside of
the bearing housing smoothly. If the race is loose or
wobbles inside of the bearing housing, replace the
bearing housing (
Figure 44).
Figure 43. Bearing positioning for
removal.
Figure 46. Key bearing parts
Bearing
Grease Port
Hub
Set
Screw
Bearing
Race
Guide Pin
Figure 45. Typical bearing-bloock grease
groove and grease port.
Bearing Housing Grease Groove
Grease
Port
9. Insert the new bearing into the bearing housing so
the set screws and hub are on the same side as the
grease Zerk on the bearing housing
(Figures 42 and
46).
10. Slide (DO NOT hammer) the bearing housing and
bearing onto the drum shaft.
11. Lower the drum and pillow bearing onto the mount-
ing 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 bear-
ing 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—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 on
Pages 38 & 42.
NOTICE
Make sure the bearing grease hole in the bearing lines
up with the grease groove in the bearing housing and
that no obstructions prevent bearing lubrication.
Figure 44. Typical removal and installation
bearing positioning.
Bearing
Housing
Guide Pin
Mounting Flange