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BJ5-615 Chapter 5: Maintenance 35 of 85
9. Carry out a test run.
NOTE: If the spare rotor is delivered without bearings, the bearings MUST be
mounted first.
Replacing the Main Bearings
The main bearings of the machine are made so a bearing replacement is only necessary in
exceptional cases. Dismounting and mounting of the bearings requires specialist knowledge
and a careful working method. In addition to the following advice, please observe the
instructions given in the installation manual of the bearing manufacturer or ask the service
department for help.
The bearings mounted in this machine are indicated in the spare parts list. A suitable pulling-
off device is a required for dismounting and mounting the bearings
.
Dismounting the Main Bearings
1. Dismount the V-belt cover.
2. Dismount the V-belts.
3. Dismount the gearbox.
4. Pull the distance sleeve off the rotor axis.
5. Remove the screen
6. Remove the rotor cover plates from the machine housing.
7. Screw in hooks on both shaft ends.
8. Hang on rotor on both shaft ends.
9. Remove the bearing housing mounting screw.
10. Carefully lift out the complete rotor using suitable lifting and stopping equipment.
11. Lay the rotor down in a safe location using timber beams of appropriate size.
12. Loosen the mounting screws on the bearings cover.
13. Pull the bearing housing off with a pulling-off device.
14. Pull the bearing off the rotor axis using a pulling-off device.
Mounting the Main Bearings
1. Before mounting, clean the bearing surfaces and the shaft surfaces thoroughly and
grease lightly.
2. Mount bearing in bearing housing.
3. Attach the bearing with the bearing housing to the rotor axis.
4. Lift the rotor using suitable lifting and stopping equipment and place carefully into
the bearing seats