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BJ5-620 Maintenance 36 of 73
10. Carefully lift out the complete rotor using suitable lifting and stopping
equipment.
11. Lay the rotor down in a safe location. Suitable for this are timber beams of
appropriate size.
12. Loosen the mounting screws on the bearings cover.
13. Pull the bearing housing off using 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
5. Attach the bearing housing to the bearing seats using screws.
6. Push the distance sleeve onto the rotor axis.
7. Put the gear onto the rotor axis
8. Put back the rotor cover plates
9. Put in the screen
10. Pull on V-belts and adjust the V-belt tension force.
11. Attach the V-belt cover.
12. Carry out a test run.
NOTE:
• The roller bodies will be damaged unless the mounting forces engage into inner ring.
• The hardened bearing rings are sensitive to impact stress; never hit the rings with
the hammer. Use a brass arbor or a striking bushing (piping piece) made from a
soft material. The inner diameter of the striking bushing should be only slightly
larger than the diameter of the bearing base.
• The bearing is then pushed onto the shaft using light blows. The force of pressure
must be evenly distributed on the circumference of the bearing ring.
Lubricating the Main Bearings
An important requirement for high operational safety and long service life of the arrangement
of bearings is the correct lubricant supply. Every machine is greased and checked in test runs
before delivery.
NOTE: Unsuitable lubricant, lubricant deficiency, excessive lubricant, or impurities in the
lubricant lead to overheating and extreme wear of the bearings.