GEI 56128-L
© Copyright 2016 General Electric Company
13
a.
The drive end and opposite drive end sleeve bearing may be replaced by the following procedure:
i.
For the opposite drive end the fan cover must be removed first. Use the lifting eye on the fan
cover to support and move the fan cover during disassembly. There are 5 socket head cap
screws that secure the fan cover. These must be removed.
ii.
For Zollern bearings remove the three socket head cap screws on the outer flange of the upper
half of the bearing housing which secure it to the endshield. For RENK bearings remove the
cover plate that is bolted to the upper half of the bearing housing and endshield. The name
Zollern or RENK will be embossed in the bearing housing.
iii.
Remove the four socket head screws that secure the top half of the bearing housing to the
bottom half.
iv.
Remove the upper half of the bearing housing.
v.
Remove the four socket head screws on the bearing.
vi.
Remove the upper half of the bearing.
vii.
Jack up the shaft a few mils to remove the weight of the rotor from the lower bearing surface.
viii.
Remove the split line screws from the oil ring and remove the split parts.
ix.
Rotate the lower half bearing around the shaft and remove.
b.
Cleanliness is important when working with bearings. Before reassembling a bearing, all bearing and
machine surfaces should be thoroughly cleaned with a suitable solvent. Examine all machined fits
for burrs. Remove all oil-sealing compounds from sealing surfaces.
Prior to actual reassembly, the following precautions should be observed:
i.
Inspect the bearing housing and related parts for foreign matter. Clean, if necessary.
ii.
Inspect the journals and polish them with crocus clothe if any scratches are detected. Do not
allow any metal dust to fall into the housing when polishing the journals.
iii.
Spread a thin coat of oil over the journal and bearing surfaces before reassembling.
iv.
The sealing surfaces of the bearing should be coated with a sealing compound such as No. 3
Permatex.
v.
To replace the bearing, reverse the disassembly procedure.
