Side Brushes - Poor Sweeping Performance - Kärcher KMR 1250 B Service Manual

Troubleshooting Information
Side Brushes – Poor Sweeping Performance
1 2
Side brush drive belt (shown at right)
5 3 4
L
Adjusting LH and RH side brushes
Checking sweeping patterns
36
3 4 5 6
8 7
4 5 3 2 4
R
Check drive belt side brush
The side brush is driven by elastic drive belt (5)
via intermediate shaft (6).
Belt replacement necessitates deinstallation of
intermediate shaft (6) (see page 35, pos. 12).
Check control cable side brush
The control cable (3) is subjected to considera-
ble strain through exposure to road soiling. If
required, check cable routing via deflection pul-
ley (2) for ease of movement. Clean and lubri-
cate with new grease, P/N 6.288-107.
Replace side brush
The side brush is attached to the underside of
the transmission by means of three bolts.
Sweeping pattern – Check / adjust
– Sprinkle a level surface evenly with fine sand.
Drive machine onto this surface, and set
parking brake.
– Lower side brush, and allow to run for ap-
prox. 15 to 30 seconds. Continue by raising
side brush, backing sweeper off test surface.
– The bottom position of the side brush is ad-
justed by means of the stop screw (7). The
sweeping pattern should be shaped like a
half-moon sickle.
– The top position of the side brush is adjusted
by manipulating the control cable adjustment
(4). Ground clearance of raised side brush
must be approx. 10 to 15 mm (0.40-0.60 in).
Note:
The side brush must be easily moved down
and up by means of the control lever. When
operating, it extends approx. 15 cm (5.9 in)
beyond the machine footprint, with exten-
sion radius limited by a chain (1).
1 Chain
2 Deflection pulley
3 Control cable
4 Control cable adjustment, ground clear-
ance
5 Drive belt
6 Intermediate shaft
7 Stop screw, contact pressure
8 Side brush
KMR 1250 B, LPG, D