79
Maintenance and Service
Removing the brush holder
1. Slide the locking lever (Fig. 31/1) to
the middle of the device and hold it
there.
2. Allow the brush holder (Fig. 31/6) to
lower under its own weight and then
pull out.
3. Release the locking lever (Fig. 31/1).
Disassembling the rotary brushes
Pull out the rotary brush (Fig. 31/5),
overcoming its resistance. Also refer to
Section 2.3.1 (reverse working se-
quence).
Installing the rotary brushes
Refer to Section 2.3.1.
Mounting the brush holder
1. Slide the locking lever (Fig. 31/1) to
the middle of the device and hold it
there.
2. Mount the brush holder (Fig. 31/6)
on the rotary brush, press against
the housing and then slide upwards
as far as possible.
3. Pivot the locking lever (Fig. 31/1)
back under the brush holder as far as
possible.
5.7.3 Cleaning the contact surfaces
Each time the rotary brushes are
changed, all the contact surfaces
(Fig. 31/4 and Fig. 29/7) must be tho-
roughly cleaned with a damp cloth, with
a little cleaning agent added, if neces-
sary.
Also clean the small contact
surfaces!
5.7.4 Adjusting the locking lever for
the brush holder
1. Remove the brush holder (Fig. 31/6)
(refer to paragraph ”Removing the
brush holder”).
2. Loosen the counternut (Fig. 31/3).
3. Screw the oval-head screw
(Fig. 31/2) in or out.
4. Close the brush holder (refer to para-
graph ”Mounting the brush holder”)
on a trial basis.
The oval-head screw (Fig. 31/
2) is adjusted correctly when it
lightly scrapes under the brush
holder (Fig. 31/7).
5. Remove the brush holder (Fig. 31/6)
(refer to paragraph ”Removing the
brush holder”) and adjust the oval-
head screw (Fig. 31/2) until it is at
the correct height (repeat Step 4 se-
veral times if necessary).
6. Tighten the counternut (Fig. 31/3).
