44 l
Installation, operation and maintenance manual – Squirrel cage motor – W Line - Horizontal and vertical 11239449
7.10.1.10.2
Lower bearing disassembly
In order to disassemble the bearing, proceed according to
the following guidelines:
1.
Place the motor in the horizontal position;
2.
Remove the screws (4), protection disc (5) and the
labyrinth taconite seal (6);
3.
Remove the screws (7) from the outer and inner
bearing caps (8 and 14);
4.
Remove the outer bearing cap (8);
5.
Remove the screw (9) that fixes the grease flinger (10);
6.
Remove the grease flinger (10);
7.
Remove the lower end shield (11);
8.
Remove the rolling bearing (12);
9.
Remove the inner bearing cap (14), if necessary.
Figure 7.7: Upper bearing
Figure 7.7 legend:
1.
Grease nipple
2.
Grease inlet tube
3.
Temperature sensor
4.
Grease collecting drawer
5.
Grease outlet tube
6.
Screw
7.
Outer bearing cap
8.
Spring
9.
KMT nut
10.
Spacer ring
11.
Screw
12.
Screw
13.
Bearing hub
14.
Upper end shield
15.
Rolling bearing
16.
Intermediate ring
17.
Grease flinger
18.
Guiding ring
19.
Inner bearing cap
7.10.1.10.3
Upper bearing disassembly
In order to disassemble the bearing, proceed according to
the following guidelines:
1.
Support the motor shaft with a hydraulic jack;
2.
Remove the screws (6) from the outer bearing cap of
the rolling bearing (7);
3.
Remove the outer bearing cap (7);
4.
Remove the KMT nut (9);
5.
Remove the screws (11 and 12) and remove the
bearing hub;
6.
Remove the upper end shield (14);
7.
Move the intermediate ring and the inner bearing cap
away from the bearing in order to obtain space to
place the device to remove the rolling bearing;
8.
Remove the rolling bearing (15);
9.
Remove the grease flinger (17), the intermediate ring
and the inner bearing cap, if necessary.
ATTENTION
During the bearing disassembly, it is
necessary to be careful not to damage the
balls, rollers or shaft surface;
Keep the disassembled parts in a safe
and clean place.
7.10.1.11
Bearing assembly
Clean the bearings completely and inspect the
disassembled parts and the inside of the bearing caps;
Make sure the rolling bearing, shaft and bearing cap
surfaces are perfectly smooth;
Fill up to ¾ of the inner and outer bearing cap deposits
with the recommended grease (Figure 7.8) and lubricate
the rolling bearing with enough grease before
assembling it;
Before assembling the rolling bearing on the shaft, heat
it up to a temperature between 50 ºC and 100 ºC;
For the complete assembly of the bearing, follow the
disassembly instructions in the reverse order.
Figure 7.8: Outer bearing cap
7.10.2
Rolling bearing replacement
The disassembly of rolling bearings must be done with an
appropriate tool (rolling bearing puller).
The arms of the puller must be placed on the lateral
surface of the inner ring to be disassembled or on an
adjacent part.
Figure 7.9: Tool for rolling bearing extraction
