Nilfisk-ALTO BK 900 User manual

BK 900
303000049
Betriebsanleitung....................................................3
Operating Instructions...........................................10
Notice d’utilisation.................................................17
Gebruiksaanwijzing...............................................24
Instrucciones de manejo.......................................31
D
GB
F
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NL

10
BK 900
Total width with side brush ............. mm .....................................790
Total height without/with handle .... mm ........................... 390/1,060
Total length without handle ............ mm .................................. 1,030
Working width with side brush ....... mm .....................................670
Working width with roller brush ..... mm ..................................... 480
Weight ........................................... kg .......................................... 25
Dirt collecting tank capacity ............ l.............................................40
Sweeping capacity .......................... m²/h .................... approx. 2,680
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Description
1 Description
1.1 General view 1 Side brush
2 Handwheel with knurled nut
for side brush adjustment
3 V-belt
4 Collecting tank handle
5 Handle
6 Handwheel for brush roller adjustment
1.1.1 Intended use This machine is designed only for
sweeping on solid, level surfaces.
Any other form of use is regarded
as contrary to its intended use.
The manufacturer
will accept no liability for any
damage or injury resulting from
such forms of use.
Unauthorised modifications to the
sweeping machine also relieve
the manufacturer
of any liability for resulting
damage or injury.
The brush sweeping machine
is not suitable for use in
sweeping up inflammable,
explosive, toxic, carcinogenic
or any other form of health-
endangering substances and
materials.
1.2 Technical data

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BK 900
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Operation
2 Operation
2.1 Important safety
instructions
Do not sweep up burning or
smouldering objects, e.g.
cigarettes, matches or similar
objects.
When removing any glass, metal
or similar materials from the dirt
collecting tank,
wear sturdy gloves to avoid the
risk of injury.
The dirt collecting tank should be
emptied after every use of the
sweeping machine.
The sweeping machine is not
suitable for use with liquids.
Do not use the sweeping
machine in the immediate
vicinity of heat sources (fire,
radiators, heater fans or similar
heat radiating equipment).
Use only original Alto accessories
and spare parts.
2.2 Assembly The handle and side brushes
must be fitted.
• Unpack the machine and
place it on a level surface.
Do not dispose of packaging
until all parts have been
removed.
2.2.1 Mounting the handle • Mount handle on housing at
left and right with wing nuts
(3). Only tighten wing nuts
hand-tight!
• Handle can be mounted in
position 1 or 2, depending on
height of user.

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BK 900
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Operation
2.2.2 Fitting the side brush
NOTE!
Bent bristles can be straightened
by laying the side brush in
lukewarm water.
• Remove dirt collecting tank.
NOTE!
Always stand tank on feet on
front side to prevent damage
to the rubber strip.
• Push side brush (1) onto shaft
and tighten hexagon bolt (2)
with open-end spanner
without damaging hub.
• Lay V-belt in groove of right-
hand wheel (3).
• Mount side brush arm with
pin (push in from outside) and
retaining clip (4).
Swivel down arm.
CAUTION!
Side brush must rotate anti-
clockwise when sweeper is
pushed forward.
2.3 Starting operation and
functional check
2.3.1 Mounting dirt collecting
tank
• Place tank on frame and swivel
downward.
• To remove tank, swivel upward
by handle.
2.3.2 Adjusting the side
brushes
• Loosen knurled nut (1) and
turn handwheel (2) until a
maximum of 2/3 of brush
circumference touches
ground. Retighten knurled
nut as anti-twist lock.
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BK 900
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Operation
No. on
scale
Material
swept Surface
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1.5
2
light, dry
Basic setting
heavy, damp,
sticky
large quantity
smooth
rough,
uneven
2.3.3 Adjusting brush roller •Adjust brush pressure with
handwheel. Adjustment can
be checked on scale next to
right-hand wheel. First follow
our recommendations and
then adapt brush pressure to
wear of brush roller or, if
necessary, to your local
conditions.
NOTE!
Excessively high roller pressure
increases brush wear and
requires greater pushing force.
2.3.4 Functional check •Push the machine at normal
walking speed over the
surface to be cleaned:
The cleaning capacity is
dependent on the working speed
(number of revolutions of
the brush roller).
The side brush allows edges and
corners to be swept clean.
•Check the sweeping result
and then correct the brush
pressure if necessary.
2.4 Supervision of
operation CAUTION!
String, wire, packing tape
and similar long objects
should be picked up from
the floor by hand and not
swept up with the sweeping
machine:
This will help to maintain the
sweeping capacity of the
machine and prevent machine
damage caused by jamming of
the drive.
Empty the dirt collecting tank at
regular intervals. Sweeping is no
longer possible when the tank is
full.
2.5 After completing work •Empty the dirt collecting tank.
To transport or for space-saving
storage:
•Swivel up side brush arm
•Loosen wing nuts on handle,
spread handle apart
somewhat and swivel
forward.

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BK 900
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Maintenance
3 Maintenance
3.1 Important safety
instructions
CAUTION!
Carry out only the maintenance
work described in the operating
instructions.
Contact Alto Service for all other
maintenance work.
Use only original Alto accessories
and spare parts.
3.2 Maintenance and care
3.2.1 Replacing brush roller
•Remove dirt collecting tank.
•Swivel up side brush arm and
tip machine back onto
handle.
•Screw 3 Phillips screws (1) out
of brush roller. Turn brush
roller 180 and screw screws
out of second half.
(sectional drawing)
•Pull drive pin (2) out of brush
roller.
•Install brush roller in reverse
order.
•Refit dirt collecting tank.
Brush roller
Order No. 60642
3.2.2 Replacing side brush •Swivel up side brush arm.
•Unscrew hexagon bolt (2) and
pull out of brush shaft.
•Pull off side brush (1), push on
new side brush and slightly
tighten hexagon bolt without
damaging hub.
•Adjust side brush with
handwheel (see 2.3.2).
Side brush
Order No. 60641

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Maintenance
3.2.3 Replacing V-belt •Remove dirt collecting tank.
•Swivel up side brush arm and
remove side brush (see 3.2.2).
•Take off washers and guard
plate, remove circlip with
Seeger circlip pliers and pull
belt pulley (1) off shaft (2).
Make sure that drive wedge
(3) does not fall out of shaft.
•Lay new V-belt in belt pulley
groove and reassemble in
reverse order.
•Remount dirt collecting tank.
3.2.4 Tensioning V-belt •Swivel up side brush arm,
unscrew screws (1) on roller
bracket (2) and lift roller
bracket out of rib.
•Swivel roller bracket
(diagram) and push into next
detent.
•Tighten screws, swivel down
brush arm and check belt
tension.
NOTE!
Excessive tensioning of the V-
belt reduces the sweeping
performance and leads to
premature wear.
3.2.5 Sealing strips The sealing strips prevent dust
from escaping during sweeping.
Check them regularly and
replace if damaged.
3.2.6 Greasing pinion Insert two screwdrivers in the
slots of the hub caps and lever
off evenly. Remove circlip from
wheel axle and pull off wheel.
Grease wheel axle and pinion.
Mount wheel in reverse order.
Watch marking when mounting
the hub cap.

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BK 900
Maintenance
3.3 Troubleshooting CAUTION!
With the exception
of the adjustments
and setting
explained in this
operating manual, the user
should never try to carry out any
repairs on his/her own.
Leave repairs to a qualified Alto
technician or authorised expert.
The following table will help in
locating and eliminating
operating faults in the
machine. Should it not be
possible to remedy the problem
as described below,
please contact your local Alto
service department.
Problem
‡Machine is difficult to push
‡Poor dirt pick-up performance
Cause
> Brush pressure too high
> Strings or other parts have
become stuck in the brush
roller
> Tank full
> Strings or other parts have
become stuck in the brush
roller
> Side brush worn
> Brush roller worn
Remedy
•Adjust brush pressure as
described in 2.3.3
•Remove the parts
•Empty tank
•Remove the parts
•Replace side brush (see 3.2.2)
•Replace brush roller (see 3.2.1)
3.4 Warranty The warranty and warranty
period are defined in our General
Conditions for Sale
and Delivery.
Subject to changes in the course
of technical innovations.

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