㧤㧚
Motor bearing replacement procedure
㧔㧯㧹㧲㧟㧙㧺㨛㧚㧟
1/2
㨪㧢㧙㧴㧻㧴㧙㧿㧕
1. Necessary
tools
(a) Spanner (M10 and M12)
(b) Pulley remover
(c) Impeller remover (special tool)
2. Disassembly procedure
Table 1 Parts list
No.
Part name
1
Casing
2
Impeller
3
Impeller hub
4
Impeller washer
5
Impeller bolt
6
Impeller key
7
Inlet
8
Motor plate
9
Motor
Fig. 1 Fan diagram
1) Before disassembling the fan, make any markings which will be necessary when
reassembling it.
2) Remove the inlet external connection.
3) Remove the foundation bolt.
4) Move the fan so that the inlet can be removed.
5) Remove the inlet.
6) Remove the impeller from the motor.
(1)
Turn the impeller bolt counterclockwise, and remove it with the washer
from the center of the impeller (end of the main shaft).
(2)
Either suspend or support the impeller so that it will not fall.
(3)
Use the screw holes which are located at either side of the shaft hole at
the end of the impeller boss to attach the impeller remover as shown in
Fig. 2, tighten the remover bolt and remove the impeller.
The impeller can be removed more easily if a hydraulic device is used.
If it is difficult to remove the impeller, either apply some penetrating oil
between the impeller boss and main shaft or heat the boss to about 100
to 120°C. However, be careful not to heat the main shaft.
Do not hit the impeller with a hammer or remove it at an angle as this
may lead to the main shaft being bent.
8-1
