Maintenance
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 6)
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
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 6. Sleeve Bearing Construction with Floating
Type Oil
580 Frame (See Figure 7)
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.
11.Lubricate. Turn motor by hand to be sure of proper fit and oil ring operation.
12.Start motor without load and check oil ring operation.
Figure 7. Sleeve bearing construction with
oil
Maintenance
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