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Maintenance
Protect the shaft end with a cap. If bearing is reusable,
make certain the puller applies pressure against the
bearing inner race only. If puller will not hook the bearing
inner race, fabricate a split bushing and install it between
the bearing and the puller hooks.
Figure 6. Removing Bearing with a Puller
Sleeve Bearing
When replacing sleeve bearings, it is always
desirable to check the fit (contact pattern) of the
bearing to the shaft. When ordering sleeve
bearings, be sure to provide complete motor
nameplate and bearing data.
Whenever a bearing is replaced, cleanliness must
be observed through every step of the operation.
Always inspect the bearing journal surfaces; they
must be smooth and polished. Slight scoring can be
removed with crocus cloth. If the motor shaft has
been seriously scored it must be put between
centers and reground. Journals can be ground
0.001 inch under size, but they must be round and
concentric with shaft center.
Sleeve Bearing Replacement
The replacement of sleeve bearings can often be
accomplished without uncoupling the load or
otherwise disturbing the installation.
500 Frame (See Figure 7)
1. Check replacement bearings for nicks or
shipping damage. Do not scrape.
2. Remove the upper half of the bearing bracket.
3. Carefully remove the top half of the bearing
capsule by first lifting straight up, then pulling
away from the bearing area.
4. Remove the top half of the sleeve bearing.
5. Remove bearing temperature probes if so
equipped.
6. Displace the oil rings axially away from the
bottom half of the sleeve bearing.
7. Raise the shaft slightly and support it.
8. Rotate the lower bearing half 180° and remove
the lower half of the bearing.
9. Reassemble, reversing the steps above. Apply
sealant. The side faces of the labyrinth seals
must be sealed with CURIL-T or equivalent non-
hardening sealing compound. Be careful not to
disturb or jam the seals when replacing the
upper half of the bearing capsule.
10. Lubricate. Turn motor by hand to be sure of
proper fit and oil ring operation.
11. Start motor without load and check oil ring
operation.
Figure 7. Sleeve Bearing Construction with
Floating Type Oil Seals-500 Frame
580 Frame (See Figure 8)
1. Check replacement bearings for nicks or
shipping damage. Do not scrape.
2. Loosen outer oil seal and remove.
3. Remove the two long bolts (2:00 and 10:00
o’clock positions) that go through to the inner oil
seal.
4. Remove the upper half of the bearing capsule.
5. Remove the top half of the sleeve bearing.
6. Remove bearing temperature probes if so
equipped.
7. Displace the oil rings axially away from the
bottom half of the sleeve bearing.
8. Raise the shaft slightly and support it in that
position.
9. Rotate the lower bearing half 180° and remove
the lower half of the bearing.
10. Reassemble, reversing the steps above. Apply
RTV silicon rubber or Permatex #2 sealant.
(27 pages)
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