Karcher KM 120-150 R D - Manual (Page 16)

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 Remove side panel.
 Unscrew and withdraw bolt on the roller
brush swinging arm.
 Pull out roller brush swinging arm.
 Remove lifting rod assembly from pins.
 Open quick-release locks and remove
cover.
 Pull out roller brush.
Installation position of roller brush in direc-
tion of travel

Push new roller brush into the roller
brush housing and onto the drive pin.
Note
When installing the new roller brush, ensure
correct positioning of the bristle assembly.

Position roller brush cover.
 Push lifting rod assembly on to pins.
 Push roller brush mount on to the pins.
 Tighten bolt on the roller brush mount.
 Position retaining screws for the roller
brush cover and screw home.
 Screw on side panel.
Note
Once the new roller brush has been in-
stalled, the sweeping track must be read-
justed.
Note
To do this, the machine must be in basic-
operating mode. The power button indica-
tor light should not light up.

Set programme switch to step 1 (driv-
ing). The side brush and roller brush are
raised.
 Drive sweeper on to a smooth, even
surface covered with a visible layer of
dust or chalk.
 Lower roller brush and allow it to briefly
rotate.
 Raise roller brush.
 Press pedal which raises bulk waste
flap and keep pressed.
 Drive machine backwards.
The sweeping track should have an even
rectangular shape which is between 20 and
30 mm wide.
Note
The shape of the sweeping track must not
be trapezoidal. If so, consult Customer Ser-
vice.
Note
The sweeping track can be adjusted using
a handwheel in basic-operating mode.

Open cover and secure it (Diag. 3).
 Release the wing nut.
Enlarging sweeping track:

Turn the adjustment screw in an anti-
clockwise direction (+).
Reducing sweeping track:

Turn the adjustment screw in a clock-
wise direction (-).
 Tighten the wing nut.
Note
In power-operating mode, the sweeping
track is automatically adjusted due to the
floating mounting for the side brush as the
bristles wear down. The roller brush must
be replaced if it becomes too worn.
 Park the sweeper on an even surface.
 Set programme switch to step 1 (driv-
ing). Roller brush is raised.
 Turn ignition key to "0" and remove it.
 Secure the machine with wheel
chock(s) to prevent it from rolling away.
 Lock parking brake.
 Open the side panel quick-release
locks on both sides.
 Remove side panels.
 Front sealing strip
 Loosen retaining nuts for the front seal-
ing strip (1) slightly (to replace, un-
screw).
 Screw on new sealing strip without fully
tightening the nuts.
 Adjust sealing strip.
 Set the distance of the sealing strip to
the floor so that the bottom edge trails
behind at a distance of between 35 and
40 mm.
 Tighten nuts.
 Rear sealing strip
 Set the distance between the sealing
strip and the floor so that the bottom
edge trails behind at a distance of be-
tween 5 and 10 mm.
 If worn, replace.
 Remove roller brush.
 Unscrew retaining nuts for rear sealing
strip (2).
 Screw on new sealing strip.
 Side sealing strips
 Slightly loosen retaining nuts for the
side sealing strip (to replace, unscrew).
 Screw on new sealing strip without fully
tightening the nuts.
 To set the floor clearance, insert a
sheet with a thickness of between 1 and
2 mm under the sealing strip.
 Adjust sealing strip.
 Tighten nuts.
 Screw on side panels.
Check and adjust roller brush sweeping
track Adjusting and replacing sealing strips
16 EN