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bearing cavity and replace the bearings and grease
when the motor is removed from service for
maintenance or reconditioning.
NOTE:
Warranty may be voided if
internal maintenance or repairs are not
performed by a GE Energy Authorized
Service Shop
H. Sleeve Bearings
Motors with sleeve bearings have a removable top half
bearing housing cover. By removing this cover each
bearing and the oil in the reservoir can be inspected
without disturbing the line-up.
Prior to operation of the motor, both oil reservoirs
should be filled to the center of the oil level gage. The
oil should be maintained at this level (determined with
the motor at stand still). Oil is added through the oil
sight gauge hole above each bearing or through the
inlet pipe provided.
1.
Oil
For motors operating between -10°C and 50°C, use a
good grade of mineral oil having a viscosity of ISO 32.
Consult GE Energy sales office regarding special
lubricants for unusual operating conditions.
2.
Cleaning Sleeve Bearings
Sleeve bearings housings are provided with liberal
settling chambers into which dust, dirt, and oil sludge
collect. The only cleaning necessary is to remove the
drain plug from beneath the oil level indicator or
bearing housing as the case may be. After draining,
seal the threads of the drain plug with an oil sealing
compound and refill the oil reservoir.
Whenever the motor is disassembled for general
cleaning, the bearing housing may be washed out with
a suitable solvent. In washing the bearing housing the
bearing and bearing housing assembly should be
disassembled only to the extent that is absolutely
necessary. Dry the bearing lining and shaft with a film
of oil before reassembling.
3.
Sleeve Bearing Replacement
Extreme
care
disassembly of a bearing to prevent
nicking or burring of the bearing or
machined surfaces. In addition, the surfaces of the
journal and the bearing must be protected from
damage when exposed during the process of
disassembly.
is
required
in
the
Remove all bearing sensors prior to
disassembly of the bearing.
a.
The drive end and opposite drive
end sleeve bearing may be replaced by the following
procedure:
(1) 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.
screws that secure the fan cover.
removed.
(2) 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.
(3) Remove the four socket head
screws that secure the top half of the bearing housing
to the bottom half.
(4) Remove the upper half of the
bearing housing.
(5) Remove the four socket head
screws on the bearing.
(6) Remove the upper half of the
bearing.
(7) Jack up the shaft a few mils to
remove the weight of the rotor from the lower bearing
surface.
(8) Remove the split line screws
from the oil ring and remove the split parts.
(9) Rotate the lower half bearing
around the shaft and remove.
b.
Cleanliness
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 compound from
sealing surfaces.
Prior to actual reassembly, the following precautions
should be observed:
(1) Inspect the bearing housing
and related parts for foreign matter. Clean, if
necessary.
12
GEI-56128H
There are 5 socket head cap
These must be
is
important when
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