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GEI 56128-L
© Copyright 2016 General Electric Company
12
5.
Insert brush into the relief hole. While the motor is still warm, add grease with a hand-operated grease
gun until fresh grease appears on the end of the brush or until grease has been added up to the amount
listed in Table 6.
6.
Leave the relief plug temporarily off. Start the motor and run for 10 to 20 minutes to expel any excess
grease.
7.
Stop the motor. Replace the relief plug.
8.
Restart the motor and resume operation.
CAUTION:
Failure to observe the foregoing instructions for re-greasing may result in grease leakage
and/or bearing damage. To avoid damage to equipment, bearings and grease must be kept free of
dirt.
Because this method of greasing bearings tends to purge the housing of used grease over a period of time, removal of
all grease should be required infrequently. A GE Energy Authorized Service Shop can clean the 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 is required in the 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.
Remove all bearing sensors prior to disassembly of the bearing.
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