Chapter 5: Maintenance 25 of 37
Figure 2: Belt Tensioning Information
5-6 Rotor Bearing Replacement
Use the following procedure to remove and replace the rotor bearings:
1. Shut off the machine and the main power disconnect.
2. Remove the flywheel guard and drive belts
3. Loosen the flywheel sheave bushings and bolts, and remove the shaft end cap.
Remove the flywheel and bushing. Loosen bolts on the bearing end cap and sheave
spacer.
4. Clean grease and dirt from the bearing’s exposed surfaces and shaft surfaces.
5. Remove the bearing housing containing the bearing from the shaft using the
symmetrical pattern for push screws in the bearing housings.
6. Note the condition of the shaft journal and clean and dress the surface to remove all
irregularities before installing the new bearing.
7. Replace the bearing housing in its correct position and tighten the ¾ - 16 bolts to
400 ft. lbs.
8. Clean the bearing bore surface and the shaft journal.
9. Install the bearing on the shaft journal by lightly tapping the inner race in a uniform
fashion until it bottoms out on the bearing housing seat.
SECTION
DIAMETER RANGE
(INCHES)
RPM RANGE
RATIO
RANGE
DEFLECTION
FORCE (LB)
4.00
4.00
4.00
