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Maintenance
Upper Main Shaft
Bearing
Timing Pulley
(#111-00-007)
Timing Belt
(#111-00-006)
Main Shaft
(#111-00-33)
The upper main shaft bearing is sealed and will need replacement only when
the main shaft can be freely moved by hand. This also may be indicated by
excessive oscillation in the torque reading.
To replace the bearing:
1. Remove the belt guard.
2. Remove the gear from the main shaft.
3. Unscrew the four screws beneath the gear and remove the plate to
reveal the bearing.
4. Press the bearing upward from underneath and slide it up and off the
main shaft.
5. Slide the new bearing down the main shaft and into place.
6. Reinstall the plate and secure it tightly in place.
7. Reinstall the gear, belt, and belt guard. Check the belt tension as
described below.
The Lower Main Shaft Bearing (#111-00-012-1) rarely needs replacing.
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