Repair work at the inner and outer chamber
8.
Pull the power plug and the grounding cable from the connections of the fan motor (E).
9.
Remove the screws (D) and the carrier (B) together with the overvoltage cutout board (C).
10.
You can now remove the fan motor (E) to the rear.
11.
Install the fan by following steps 1 to 10 in reverse order.
When replacing the fan, we recommend also replacing the fan drive shaft gasket (F). During
installation place first the fan with the fan drive shaft through the base plate of the fan attach-
ment, and only then the carrier of the overvoltage cutout board.
Push the fan wheel in a way that the arrow on the fan wheel fits the arrow on the fan drive
shaft. Tighten the screws (H) at the seal ring for fan drive shaft (G) with 1.5 Nm. Tighten the
nut (M) with a dynamometric key with 5 Nm. To tighten the fan wheel (clockwise), do not hold
it on its lamella, but use a 24 mm /
0.94 in
fork wrench instead (see point 3).
A
C
D
E
F
G
I
P
O
N
M
L
K
J
B
H
Figure 23: Replacing the fan (-4M1)
A
Board spacer
B
Carrier
C
Overvoltage cutout board
D
Hexagon socket screws M6
E
Fan motor
F
Fan drive shaft gasket
G
Seal ring for fan drive shaft
H
Hexagon socket screws
I
Driving sheet
J
Rear panel
K
Disk
L
Fan wheel
M
Nut M6
N
Fan panel
O
Fan cover
P
Screws
Service Manual KBF (E5.2) 04-2015
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