Maintenance & Troubleshooting 3-5
MN409
16. Loosen and remove the bolts securing the bottom half of the bearing housing to the end shield.
Use eye bolts and hoist to remove the bottom half of housing. Shims for axial location of the
shaft are located between the lower bearing housing and end cap machined fits.
Note their location for reassembly.
17. The inboard machined seal, outboard seal carrier, and bolt on baffle are still attached to the
bearing housing. These parts can be removed by loosening all bolts and disassembling.
18. For reassembly perform the above listed steps in reverse order. Assemble both the bottom
and top half of the seals. Press up on the bottom half of the outboard seal and baffle so that
there is no clearance between the seal and shaft at the bottom. Make sure that the clearance
from side to side is symmetric.
19. All machined split line surfaces of the bearing housing and seals must be coated with a sealing
compound (Curil Tor Permatex #3). Also apply seal compound to the flange of the machined
seals and seal carrier.
G50 Sleeve Bearing Replacement
1.
The sleeve bearing may be replaced without disturbing the setup and uncoupling from the
driven equipment. Remove the top and bottom bearing liners at stated in “G50 Sleeve Bearing
& Cartridge Removal Instructions”.
2.
Make sure that the shaft bearing shoulders and journal are free of nicks and burrs before
replacing bearing. Dress shaft with emery cloth or stone as necessary. Clean the shaft and oil
sump thoroughly.
3.
Apply a coating of oil to the bearing journal.
4.
Inspect the replacement bearing for nicks and damage. The bearing may be packed in a waxy
rust inhibiting compound. Remove all wax from bearing surfaces using solvent. Dry bearing
before assembling in housing. The bearings are spherical self seating. Apply a coat of oil to the
outside diameter of the bearing liner and also to the bearing housing bore.
Do not scrape the
bearing Babbitt surface for seating.
5.
Reassemble the motor. Apply sealant to the split line of bearing housing seals.
6.
Fill oil reservoir so that oil is at the midway point in the sight gauge.
7.
Slowly rotate the shaft to insure the bearings and seals are seated properly.
G5000, G315, G5810 and G40 Sleeve Bearing & Cartridge Removal
1.
Disconnect and lockout the power source. Ensure no power is applied to the motor.
2.
Remove the fan cover/air scoop and accessories (forced lubrication plumbing) that are
assembled to the end shield and bearing housing. Loosen bolts and remove protective cover
bolted to flange of the end shield.
3.
The bearing housing must be disassembled from the end shield before removing the end shield
from the frame.
4.
Remove drain plug at bottom of bearing housing and drain oil from the reservoir.
5.
Loosen and remove the bolts at the split line of the bearing housing. Remove top half of
bearing housing.
6.
Pry slots are provided on the outboard bearing face to facilitate removing top of the bearing
housing.
7.
Using hand pressure, separate the bearing halves. (Bearings halves are doweled together).
Note: Some models are equipped with socket head screws in addition to the dowels. These screws must
be removed before attempting to remove bearing top half.
8.
Remove top half of bearing and bearing anti
−
rotation keying devices from bearing housing.
9.
Remove Bearing RTD’s if supplied.
10. Using a rope or sling (Nonmetal) around the shaft, raise it just high enough to be able to spin
out the bottom half of the bearing.
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