Kärcher BR 75/140 R Series Owner's manual

New Unit Information 03.2004
BR/BD 75/140 R
BR/BD 90/140 R
1.246- . . .
New Unit Information
5.905-888

Technical Features BR/BD 75/140 R, BR/BD 90/140 R
Page 2 / 71 New Unit Information 03.2004
Drive unit system
– 3-wheel running gear with front wheel steering
and front wheel-hub motor with electro-magne-
tic brake.
– Forwards and reverse drive unit with one drive
pedal, changeover with selector button on the
instrument panel.
– Machine brakes automatically, if the driver
moves away (removes weight) from the seat
(seat contact switch) or if the drive pedal is
released. The brake function takes place with
approx. 1.5 seconds delay.
– When not in operation, an electromagnetic
brake on the wheel-hub motor prevents the
unit from rolling away.
Brush system
– Brush head with two brush rollers or two disc
brushes (two drive motors each).
– Brush rollers rotate from below towards; each
other disc brushes rotate together at the front.
– Coarse dirt pan for coarse dirt picked up at the
brush head (BR version only).
– Brush head contact pressure is adjustable.
– Brushes can be changed without tools.
– Brush head with lateral sealing strips to limit
water distribution.
Water system
– Fresh-water tank in the front of the unit hou-
sing.
– Dirty water tank at the rear with float switch.
– Water feed to brush head with water pump.
– Water flow control with electric metering val-
ve, 10 positions.
– Air bleeder valve for quick bleeding of the wa-
ter hose at the brush head (only BR head).
Vacuum system
– Suction motor (long life) vacuums the dirty
water into the dirty water tank.
– If the dirty water tank is full the electric float
switch switches off the suction motor with a
time delay between 15-20 seconds.
– Suction bar available in a straight or curved
version.
– On switching the suction motor On/Off the
suction bar is lowered/raised. When raised the
suction motor continues running for approx.
10 seconds.
– Rubber strips on the suction bar can be repla-
ced without tools.
– The inclination of the suction bar can be adju-
sted without tools.
Electrics
– The main control printed circuit board is loca-
ted behind the metal cover to the left next to the
footrest.
– The instrument panel printed circuit board is
located underneath the control panel.
Battery
– 24 Volt block battery, 400 Ah, low-maintenance
with filling system.
– Battery monitoring with exhaustive discharge
protection.
Note:
Various things have been changed in the
version of the unit. They are
identified in this document with .
The most important change concerns the
new printed circuit board 2.816-067, which
will be installed as of manufacturing number
10800.
REVISED
REVISED

BR/BD 75/140 R, BR/BD 90/140 R Unit Functions
Page 3 / 71
New Unit Information 03.2004
1 Steering wheel
2 Control panel
3 Cap, fresh-water tank
4 Fresh-water tank
5 Cover, main control printed circuit board
6 Central battery connector (X1)
7 Drive unit pedal
8 Front wheel, wheel hub motor
9 Lateral sealing strip, spring-loaded
10 Brush head, BR version
11 Coarse dirt pan (BR version only)
12 Seat
View from front (BR-Version)
1
3
4
6
7
8
9
12
2
5
10
11

Page 4 / 71
Unit Functions BR/BD 75/140 R, BR/BD 90/140 R
New Unit Information 03.2004
1
3
2
4
6
7
8
9
10
11
12
1 Cover, main control printed circuit board
2 Brush head, BR version
3 Lateral sealing strip, spring-loaded
4 Coarse dirt pan (BR version only)
5 Supporting castor for suction bar, optional
6 Suction bar, straight version
7 Deflector wheel, suction bar
8 Drain hose, dirty water tank
9 Suction hose
10 Dirty water tank
11 Cover, dirty water tank
12 Control panel
View from rear (BR-Version)
5

BR/BD 75/140 R, BR/BD 90/140 R Unit Functions
Page 5 / 71
New Unit Information 03.2004
Suction bar
1 Drain hose, dirty water tank
2 Suction hose
3 Deflector wheel with star handle for
replacing/rotating the rubber strips
4 Star handle, for installing the suction bar
5 Rubber strip
6 Wing nut, for adjustment of suction bar
inclination
7 Bracket, suction bar
8 Lifting motor (M30) for lowering and
raising the suction bar
Note:
As a standard, the front rubber strip is
grooved and the rear one is smooth. In case
of wear, both rubber strips can be rotated to
extend their application life.
1
8
6
7
5
4
3
2

Page 6 / 71
Unit Functions BR/BD 75/140 R, BR/BD 90/140 R
New Unit Information 03.2004
1 Tank cover
2 Fluff strainer, air intake suction motor
3 Float switch (S17)
4 Seal, tank cover
Dirty water tank
1
2
4
3

BR/BD 75/140 R, BR/BD 90/140 R Unit Functions
Page 7 / 71
New Unit Information 03.2004
Brush head (BR-Version)
1 Brush head (BR version)
2 Front wing nut, for securing the mounting
plate
3 Deflector wheel
4 Spring for lateral sealing strip mounting
plate
5 Lateral sealing strip
6 Mounting plate for sealing strip, spring-
loaded
7 Adjusting screw, brush pattern
8 Rear wing nut, for securing the mounting
plate
9 Cover for brush drive unit assembly
1
2
3
45
6
7
8
9

Page 8 / 71
Unit Functions BR/BD 75/140 R, BR/BD 90/140 R
New Unit Information 03.2004
Brush head (BD-Version)
1 Brush head (BD version)
2 Deflector roller
3 Disc brush
4 Side sealing strip, spring loaded
5 Brush head bracket
1
2
3
4
5

BR/BD 75/140 R, BR/BD 90/140 R Unit Functions
Page 9 / 71
New Unit Information 03.2004
1 Connecting terminal minus pole
2 Connecting terminal plus pole
3 Connection cable
4 Battery (G1)
5 Central battery connector (X1)
= EMERGENCY STOP
6 Air outlet hose, suction motor
7 Suction motor (M3, EC long life)
8 Dirty water tank
Battery
–
1
2
3
4
5
6
7
8
+
Note:
The dirty water tank (8) can only be lifted if
the dirty water has been drained.
ORIGINAL

Page 10 / 71
Unit Functions BR/BD 75/140 R, BR/BD 90/140 R
New Unit Information 03.2004
1 Connecting terminal minus pole
2 Connecting terminal plus pole
3 Connection cable
4 Battery (G1)
5 Central connector (X1) = EMERGENCY
STOP
6 Filling hose
7 Suction motor (M3, EC long life)
8 Dirty water tank
Battery
1
2
3
5
4
8
7
6
REVISED
Note:
The dirty water tank (8) can only be lifted if
the dirty water has been drained.