Karcher Lawn Sweeper KMR 1250 B User Guide

KMR 1250 B  
1.091-104  
1.091-124  
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English  
User Instructions  
KMR 1250 B  
Contents  
For your safety ..........................................................................................................................................29  
On behalf of the environment ....................................................................................................................30  
Intended usage..........................................................................................................................................31  
Sweeper functions ....................................................................................................................................31  
Prior to initial start-up ................................................................................................................................32  
Operating controls ....................................................................................................................................33  
Preparing the sweeper for use..................................................................................................................34  
Adjusting the driver’s seat ....................................................................................................................................34  
Filling the fuel tank ...............................................................................................................................................34  
Opening the fuel tap .............................................................................................................................................34  
Starting the sweeper .................................................................................................................................35  
Initial driving trials .................................................................................................................................................35  
Moving off and sweeping.......................................................................................................................................35  
Braking ................................................................................................................................................................36  
Stopping the sweeper and switching off ................................................................................................................36  
Cleaning the filter .................................................................................................................................................36  
Emptying the waste hopper ..................................................................................................................................37  
Typical applications ...................................................................................................................................38  
Sweeping on dry ground .......................................................................................................................................38  
Sweeping on damp or wet ground.........................................................................................................................38  
Shutting the sweeper down for longer periods..........................................................................................39  
Transporting the sweeper .........................................................................................................................40  
Cleaning and care .....................................................................................................................................40  
Maintenance ..............................................................................................................................................41  
Daily maintenance ...............................................................................................................................................41  
Maintenance intervals...........................................................................................................................................41  
Maintenance tasks ....................................................................................................................................42  
Opening/closing the unit cover .............................................................................................................................42  
Disconnecting the battery ....................................................................................................................................42  
Checking tyre pressures ......................................................................................................................................43  
Checking the oil level ...........................................................................................................................................43  
Filling up with oil ..................................................................................................................................................43  
Changing the engine oil ........................................................................................................................................43  
Cleaning or replacing the air cleaner.....................................................................................................................44  
Cleaning the fuel filter holder ................................................................................................................................44  
Checking the hydraulic system ............................................................................................................................44  
Checking the level of electrolyte in the battery......................................................................................................45  
Charging the battery .............................................................................................................................................45  
Replacing the sealing skirts .................................................................................................................................46  
Replacing the side brush ......................................................................................................................................46  
Replace light unit .................................................................................................................................................46  
Adjusting the sweeping pattern ............................................................................................................................47  
Replacing the main brush roller ............................................................................................................................48  
Replacing fuses ...................................................................................................................................................49  
Replacing the dust filters ......................................................................................................................................49  
Troubleshooting.........................................................................................................................................50  
Technical specifications ............................................................................................................................51  
28  
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KMR 1250 B  
User Instructions  
English  
Before you use this machine for the first time, please read  
the following:  
For your safety  
– these operating instructions  
– the enclosed leaflet Safety Information No. 5.956-250.  
Make sure that all information contained therein is complied  
with.  
!
Explosion hazard while refuelling!  
n Do not fill up with fuel  
– in an enclosed space  
– while the engine is running.  
n Do not smoke while refuelling the vehicle.  
n Fuel expands as it becomes warmer.  
Do not fill the tank right up to the top. Leave a gap of at  
least 1 cm under the bottom edge of the filler neck.  
n Wipe up any fuel they may have been spilt and ensure  
that the cap is replaced firmly on the tank.  
!
Fire hazard while sweeper is operating!  
n Keep highly inflammable materials away from the engine  
and the exhaust while the sweeper is operating.  
!
Danger of toppling over on steep slopes!  
The sweeper could topple over while it is being driven  
across or turning round on a sleep slope.  
n The maximum gradient up or down which the sweeper  
can be driven is 18%.  
n Do not drive at right angles to a slope with a gradient  
steeper than 10%.  
!
Danger of toppling over if bends are negotiated at  
high speed!  
n The sweeper could topple over if it is driven round a bend  
at high speed. Drive slowly round bends.  
!
Caution when carrying out maintenance or repairs!  
In order to prevent the engine from being started unintentio-  
nally, proceed as follows:  
n Remove the ignition key.  
n Disconnect the battery at the negative terminal.  
!
Caution while handling the battery!  
Observe the safety information provided by the battery  
manufacturer.  
Always use batteries and chargers recommended by  
KÄRCHER, otherwise your warranty could be rendered  
invalid.  
29  
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English  
User Instructions  
KMR 1250 B  
!
Caution while transporting the sweeper!  
Make sure that the sweeper is secured properly if you are  
going to transport it to a different location.  
Do not use a forklift truck for loading purposes as it could  
damage the sweeper.  
n Apply the parking brake.  
n Secure the sweeper as shown in the illustration, using  
– web belts  
or  
– ropes  
or  
– chains.  
On behalf of the  
environment  
!
Caution, environmental hazard due to exhausted  
batteries!  
Exhausted batteries should not be treated as domestic  
refuse. Make sure that are disposed of in an environmentally  
appropriate manner.  
!
Caution, environmental hazard due to engine oil or  
hydraulic fluid!  
After you have changed the engine oil or hydraulic fluid, take  
the waste product to a recognised collection point or to a  
waste disposal company.  
30  
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KMR 1250 B  
User Instructions  
English  
This sweeper  
Intended usage  
– is intended to be used for sweeping outdoor surfaces,  
– corresponds to application category BIA KAT ”U” for  
dusts which present no health hazard  
– should not be used in enclosed spaces,  
– can only be used on public paths and highways if it has  
been fitted with the StVZO Accessory Kit.  
Main components  
Sweeper functions  
Drive unit  
– single-cylinder petrol engine (6.6 kW according to SAE J  
6070a)  
– continuously-adjustable hydraulic drive to rear wheels  
– main brush and side brush driven via belts  
– hydraulically controlled emptying of waste hopper  
– high-performance generator  
Sweeping mechanism  
– main brush employing throw-over principle for particularly  
effective filling of waste hopper  
– floating main brush roller with adjustable height above  
ground  
– quick-change mechanism for main brush  
– side brush can be raised and swivels automatically  
– bulk waste flap for picking up larger items (e.g. cigarette  
packs or drink cans)  
Filter system  
– integrated dust extraction for main roller by means of  
radial turbine  
– 2 circular filters with 2 x 3 m2 effective surface area  
– electric filter cleaner with automatic shaking mechanism  
31  
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English  
User Instructions  
KMR 1250 B  
Unloading procedure  
Prior to initial start-up  
Do not use a forklift truck for unloading as it could  
cause damage to the sweeper.  
!
The sweeper has been lashed onto a pallet to ensure that  
it can be transported safely. The procedure for unpacking  
the sweeper is as follows:  
1. Remove the wooden boards from the pallet and nail  
them onto the end of the pallet (in front of the sweeper).  
2. Detach the wires holding the sweeper in place at the  
ends of the pallet.  
3. Knock away the blocks used for locking the wheels and  
use them for the support of the wooden planks on the left  
and right.  
4. Drive the sweeper off the pallet and down the ramp  
made from the boards.  
5. The side brush has been tied to the chassis for trans-  
port. Undo the cord holding it in place.  
Pushing the sweeper by hand  
If you wish to move the sweeper without using its own drive:  
n Open the engine cover.  
n Fold the cover towards the rear; it will be held in place by  
the pneumatic spring.  
ç Turn the lever for allowing freewheeling to position ”OFF”.  
n Release the handbrake.  
n Push the sweeper to the required destination.  
Note:  
Do not move the sweeper over long distances without using  
its own drive or at higher speeds than 10 km/h (e.g. whilst  
being towed).  
After moving the machine  
n Put the parking brake on.  
n Set free-wheeling lever to position ”ON”.  
32  
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KMR 1250 B  
User Instructions  
English  
Operating controls  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
9.  
Ignition lock  
Choke  
Throttle lever  
Raise / lower RH side brush  
Raise / lower main brush  
Raise / lower LH side brush (optional)  
Switch for two-handed operation  
Operating hour counter  
Lights  
11. Parking brake / Driving brake  
12. Tip waste hopper *  
13. Raise waste hopper *  
14. Lower waste hopper *  
15. Filter cleaning  
16. Sweeping mode, wet / dry  
17a. Drive pedal backwards  
17b. Drive pedal forwards  
18. Horn  
10. Bulk waste flap  
19. Steering wheel  
20. Open/close unit cover  
* Function only operative in conjunction with 7 (two-handed operation).  
33  
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User Instructions  
KMR 1250 B  
All directions given (left/right, front/rear) are as seen from  
the driver’s seat.  
n Check the oil level in the engine (see Chapter: “Mainte-  
nance”).  
Preparing the sweeper for  
use  
n Check the amount of fuel in the tank and fill up, if required  
(see below).  
n Check the level of hydraulic fluid and top up, if required  
(see Chapter: “Maintenance”).  
n Check the air pressure in the tyres (see Chapter:  
“Maintenance”).  
n Inspect the brush roller and remove any string, rope, etc.,  
that may be caught up in the brushes.  
n Check the dust filter. If it is very dirty, operate the shaker  
to clean it off.  
n Empty the waste container.  
Adjusting the driver’s seat  
The driver’s seat can be adjusted to suit persons of various  
heights.  
n Unhook the rods in the seat tilting device.  
ç Undo the 4 screws.  
n Move the seat to the desired position.  
n Tighten the screws and hook the rods back into the tilting  
device.  
Filling the fuel tank  
!
Explosion hazard while refuelling!  
n Do not fill up with fuel  
– in an enclosed space  
– while the engine is running.  
n Do not smoke while refuelling the vehicle.  
n Fuel expands as it becomes warmer.  
Do not fill the tank right up to the top. Leave a gap of at  
least 1 cm under the bottom edge of the filler neck.  
n Wipe up any fuel they may have been spilt and ensure  
that the cap is replaced firmly on the tank.  
n Use petrol, regular (lead-free).  
Opening the fuel tap  
n Open the unit cover.  
ç Open the fuel tap.  
OPEN = lever pushed to side opposite to direction of  
travel  
n Close the unit cover.  
34  
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KMR 1250 B  
User Instructions  
English  
Initial driving trials  
Starting the sweeper  
Carry out initial driving trials in an area where there is plenty  
of free space until you are familiar with individual operating  
controls and their functions.  
All indications of direction (right/left, front/rear) are given in  
relation to the direction of travel as seen from the driver’s  
seat.  
n Sit down on the driver’s seat.  
The engine cannot be started until the driver has sat  
down (seat contact switch). As soon as driver gets up  
from the seat, the engine switches off (safety cut-out).  
n Make sure that  
– the LH side brush (if fitted) is in the raised position,  
– the RH side brush is in the raised position,  
– the main brush is in the raised position.  
n Set the throttle lever to the middle position  
[
] (operating speed).  
n Pull out the choke [ ] .  
n Turn the ignition key to the start position [  
].  
n When the engine has started running, set the control for  
the choke back to its home position.  
Moving off and sweeping  
n Lower the main brush [  
brush as well [ ].  
n Release the parking brake [  
] and, if required, the side  
]
– push the lever towards the front.  
n Slowly depress drive pedal  
– depress right pedal, machine travels forwards  
– depress left pedal, machine travels backwards.  
Whichever drive pedal is being used at the time, the driving  
speed can be uniformly and smoothly regulated backwards  
or forwards. Avoid jerky operation of the pedals, as the  
hydraulic system could suffer damage in this way.  
35  
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English  
User Instructions  
KMR 1250 B  
Braking  
n Release the drive pedal and the sweeper will brake auto-  
matically.  
Important note: Safety!  
It is possible that the automatic braking function will not be  
sufficient to bring the sweeper to a halt. In this case, either  
make use of the parking brake as well or gently press the  
drive pedal in the opposite direction to travel.  
Stopping the sweeper and switching off  
n Release the drive pedal. The sweeper brakes automati-  
cally and comes to a halt.  
n Apply the parking brake [  
].  
n Set the throttle lever to minimum engine speed (to the  
rear).  
n Make sure the main roller [  
] and side brush [  
]
are raised so that the bristles are not damaged.  
n Switching off  
– Turn the ignition key counter-clockwise to the 0 positi-  
on and then remove it.  
After the engine has been switched off, the filter is  
automatically cleaned for approx. 10 seconds.  
Automatic cleaning  
Cleaning the filter  
n Stop the sweeper and switch off the engine.  
After the engine has been switched off, the filter is auto-  
matically cleaned for approx. 10 seconds.  
Manual cleaning  
While the sweeper is operating, the filter should be cleaned  
approx. every 15–30 minutes (depending on amount of  
dust).  
n Stop the sweeper.  
n Set the sweeping mode lever to wet [  
n Briefly operate the filter cleaning button  
].  
, whereupon  
the filter will be cleaned for a duration of approx. 10 secs.  
n Set the sweeping mode lever back to dry [  
n Continue with cleaning task as before.  
].  
36  
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KMR 1250 B  
User Instructions  
English  
Emptying the waste hopper  
!
Important information  
Injury hazard!  
No person or animal should be allowed to stand in the area traversed by the hopper while it is  
being emptied.  
Danger of being crushed!  
Do not reach into the shafts and linkage of the emptying mechanism.  
Do not stand under the hopper.  
Risk of sweeper toppling over!  
If the sweeper is standing on a slope with a gradient of more than 5%, it could topple over while  
the hopper is being emptied. The hopper should therefore only be emptied when the gradient at  
the location where the sweeper is standing is less than 5% for the direction in which it is facing.  
n Stop the sweeper.  
n Raise the main brush [  
].  
Note: Following steps can only be performed with the  
sweeper set to two-handed operation.  
n Raise the waste hopper, [  
+
].  
When the hopper has reached the required height:  
n Tip the hopper outwards, [ ].  
+
Note:  
The hopper must have reached a certain minimum height  
before it can be tipped out. The best position for emptying  
the hopper is when it has been fully extended.  
As soon as you release the button for activating the tipping  
system, the hopper automatically returns to its original  
position.  
n Lower the hopper,  
+
.
37  
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English  
User Instructions  
KMR 1250 B  
Typical applications  
!
Caution while sweeping!  
Do not sweep up packing bands, wires or similar items,  
otherwise the sweeping mechanism will be damaged.  
Do not sweep any burning/glowing objects.  
Sweeping on dry ground  
For a small amount of normal dirt  
n on an even surface:  
lower main brush  
– set the lever to the middle position [  
brush wear).  
] (minimum  
n on an uneven surface:  
lower main brush  
– set the lever to the lower position [  
brush wear).  
] (increased  
n switch on dust extraction  
– set the switching mode lever to dry [  
].  
n for cleaning right up to the edges – lower the side brush  
].  
[
At regular intervals:  
n clean the filter,  
n empty the waste hopper.  
Notes: If you are sweeping up fine dust, use the side brush  
as little as possible as it will increase the amount of dust  
stirred up by the sweeper. If the side brush encounters an  
obstacle, it automatically swivels back inside the outer  
contours of the sweeper. You should nevertheless try to  
avoid collisions.  
While the sweeper is operating, the filter should be cleaned  
approx. every 15–30 minutes (depending on amount of  
dust).  
Sweeping on damp or wet ground  
Follow the same procedure as for sweeping on dry ground.  
In order to protect the filter from moisture  
n switch off the dust extraction  
– set the sweeping mode lever to wet [  
].  
At regular intervals:  
n empty the waste hopper.  
38  
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KMR 1250 B  
User Instructions  
English  
Picking up larger items (sticks, tins, etc.)  
Caution!  
When the bulk waste flap is open, stones or grit could be  
thrown at the front by the main brush. Make sure therefore  
that when you open the flap no persons, animals or property  
are endangered.  
n Open the bulk waste flap [  
] by pulling back the  
corresponding lever.  
n Drive over the items to be picked up, at low speed and  
with the bulk waste flap open.  
Note:  
In order to avoid stirring up dust unnecessarily, close the  
bulk waste flap again as soon as possible.  
Overcoming obstacles  
Obstacles up to 5 cm in height  
– can be driven over without any problems. Before you do  
so, open the bulk waste flap and raise the main brush.  
Obstacles more than 5 cm in height  
– can be only be driven over with the aid of a suitable ramp.  
If you do not intend to use the sweeper for a longer period of  
time (e.g. during the winter), please observe the following.  
n It is most important that the main brush and side  
brush(es) are kept raised in order to avoid damage to the  
bristles.  
Shutting the sweeper down  
for longer periods  
n Clean the interior and exterior of the sweeper.  
n Close the fuel tap.  
n Change the engine oil (see Chapter: “Maintenance”).  
n Store the sweeper in a protected environment and ensure  
that it cannot roll away.  
n Remove the ignition key.  
n Disconnect the battery.  
n Charge the battery with a suitable charger approx. every  
two months (see Chapter: “Maintenance”).  
39  
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User Instructions  
KMR 1250 B  
If the sweeper is going to be transported on the back of a  
vehicle, it must be properly secured so that it cannot move  
unintentionally.  
Transporting the sweeper  
n Apply the parking brake.  
n Secure the sweeper in the manner shown in the illustrati-  
on only, using  
– web belts  
or  
– ropes  
or  
– chains.  
Before you carry out any cleaning or general maintenance  
tasks,  
Cleaning and care  
n park the sweeper and switch off the engine.  
Cleaning the inside of the sweeper:  
You can clean out the inner parts of the sweeper by blowing  
them through with compressed air.  
Cleaning the outside of the sweeper:  
The outside of the sweeper can be wiped off with a damp  
cloth. Do not use any aggressive cleaning agents which  
might cause damage to the plastic components.  
40  
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KMR 1250 B  
User Instructions  
English  
First engine oil change  
Maintenance  
!
Caution!  
When an engine is new, it is subject to increased abrasion.  
In order that the engine does not suffer any damage, we  
recommend that you change the engine oil and the oil filter  
after the first 8 operating hours.  
Initial inspection after 8 operating hours  
!
Caution!  
In order to ensure that your sweeper functions safely and  
reliably, it should undergo an initial inspection after approx. 8  
operating hours. The inspection should be carried out by an  
authorised service agent.  
n Check all Bowden cables and make adjustments where  
necessary.  
n Change the engine oil.  
n Check that there are no leaks in the hydraulic system and  
all components function correctly.  
n Check that the parking brake functions correctly.  
n Check the air pressure in the tyres (correct level: 6 bar).  
Daily maintenance  
n Check the engine oil level.  
n Check the tyre pressure (correct level: 6 bar).  
n Inspect the brush roller and remove any string, rope, etc.,  
that may be caught up in the brushes.  
n Check the dust filter. If it is very dirty, operate the shaker  
to clean it off.  
n Empty the waste container.  
Maintenance intervals  
Keep to the service intervals set out in the maintenance  
booklet so that your sweeper functions reliably and you  
retain the full benefit of the warranty.  
The maintenance booklet (Order-no. 5.950-533) can be  
found in the tool compartment on the sweeper (under the  
bonnet).  
The necessary maintenance tasks should be carried out by  
an authorised service agent.  
41  
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User Instructions  
KMR 1250 B  
!
Safety information applicable to maintenance  
tasks  
Before you begin any maintenance tasks, please read the  
enclosed leaflet Safety Information No. 5.956-250.  
Caution! Make sure engine cannot be started uninten-  
tionally.  
In order to prevent the engine from being started unintentio-  
nally, proceed as follows after you have parked the  
sweeper.  
n Pull out the ignition key.  
n Disconnect the battery at the negative terminal.  
The necessary maintenance tasks or daily inspections can  
be carried out with the bonnet raised.  
Injury hazard!  
Do not open the bonnet until the motor has been switched  
off.  
Burns hazard!  
Take care not to touch the exhaust when you open the  
bonnet.  
Injury hazard!  
ç If you need to work under the waste container while it is  
in the raised position, you must first of all secure the  
container to prevent it from dropping down unintentional-  
ly:  
Maintenance tasks  
Opening/closing the unit cover  
n Tip the seat forwards.  
n Take hold of the unit cover by the recessed grip and open  
it by pulling upwards.  
Disconnecting the battery  
n Open the unit cover.  
n First of all disconnect the cable from the negative termi-  
nal (–), then disconnect the positive terminal (+).  
Note:  
When reconnecting the battery, proceed in reverse order –  
connect the positive terminal (+) first of all, then the negati-  
ve terminal (–).  
42  
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KMR 1250 B  
User Instructions  
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n Park the sweeper on a level surface.  
n Check air pressure and adjust pressure as required.  
Checking tyre pressures  
Air pressure for front and rear wheels = 6 bar  
Checking the oil level  
n Park the sweeper on a level surface.  
ç Pull out the dipstick.  
n Wipe the dipstick clean and re-insert it in the filler hole.  
n Pull out the dipstick again and check the result.  
The oil level should be between the MIN and MAX marks.  
If the oil level is below MIN – top up with oil.  
If the oil level is above MAX – drain off the surplus.  
n Insert the dipstick back into the filler hole.  
n Pour engine oil type SAE 15W40 into the hole for the  
Filling up with oil  
dipstick.  
Changing the engine oil  
Caution! Danger to the environment from engine  
oil  
After carrying out an oil change, ensure that the waste oil is  
passed to an appropriate collection point or official disposal  
company.  
Caution,  
n Run the engine until it reaches its normal operating tem-  
perature.  
n Make sure the sweeper is standing on a level surface.  
n Open the unit cover.  
n Place a drip pan under the engine.  
ç Hold the end of the drain tube over the drip pan and let  
the old oil run out.  
n Close off the end of the drain tube again.  
n Pour engine oil into the filler hole.  
Capacity = 1.1 litres  
n Check the oil level with the dipstick – see “Checking the  
oil level”.  
n Wipe up any oil spillage and dispose of the waste oil  
appropriately.  
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User Instructions  
KMR 1250 B  
Cleaning or replacing the air  
cleaner  
Do not run the engine without an air cleaner other-  
wise this will lead to increased wear on the engine  
The air cleaner must be washed out more frequently if the  
engine is run in particularly dusty environment.  
Do not wash the air cleaner in petrol or a cleaning  
solvent with a low flash point.  
n Paper insert 1: Replace the insert if it is very dirty. Other-  
wise, blow compressed air through the insert from the  
inside to out or knock it against a hard surface. Do not  
brush it off, otherwise the dirt will be compacted between  
the fibres.  
1
2
n Foam insert 2: Wash out the insert in a solution of was-  
hing-up liquid and warm water. Rinse it out and allow it to  
dry out thoroughly. Immerse the clean insert in engine oil  
and squeeze out the excess fluid. If too much oil is left in  
the insert, smoke will be given off by the engine when it is  
next started.  
Cleaning the fuel filter  
holder  
Petrol is highly flammable and under certain con-  
ditions it is also explosive. Do not smoke within  
the working area and keep away from open flames  
or sparks.  
When the filter holder is refitted, check that it  
seals properly and make sure the whole area is dry  
before starting the engine.  
1
2
n Set the fuel tap to OFF 1.  
n Detach the filter holder and O-ring 2 and wash it out in a  
non-flammable or flame-resistant solvent. Allow the  
holder to dry out thoroughly and then screw it on tight.  
n Set the fuel tap to OPEN. Check that there is no leakage.  
n Carry out a visual inspection. If there is any loss of fluid  
from the hydraulic unit, cylinder or hoses, call KÄRCHER  
Customer Service.  
Checking the hydraulic  
system  
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KMR 1250 B  
User Instructions  
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Safety information  
which must be observed when handling batteries.  
Comply with the user instructions and ensure that these are displayed at the  
charging station. Before the operator carries out any work on batteries, he/she  
must have received proper instruction from a suitably qualified person.  
Wear safety goggles and protective clothing when working on batteries. Ob-  
serve accident prevention regulations, as well as DIN VDE 0510, VDE 0105  
Part 1.  
Smoking is forbidden!  
Make sure that there are no naked flames, other source of heat or sparks in  
the proximity of the battery, otherwise there is a danger of explosion or fire.  
If electrolyte comes into contact with skin or eyes, rinse the affected area with  
plenty of clean water. The metal parts of battery cells are permanently live.  
Therefore do not place any tools or other objects on top of the battery.  
Explosion and fire hazard! Avoid short-circuits.  
Warning! The metal parts of battery cells are permanently live. Therefore do  
not place any tools or other objects on top of the battery.  
Electrolyte is highly corrosive. Under normal operating conditions it is not  
possible for anything to come into contact with the electrolyte. If the battery  
housing is destroyed, the bound electrolyte that leaks out is just as corrosive  
as liquid electrolyte.  
Return to manufacturer!  
Exhausted batteries bearing this symbol are a re-usable resource which  
should be recycled accordingly. Exhausted batteries that are not intended to  
be recycled must be disposed of as hazardous waste in compliance with all  
relevant regulations.  
Note: concerns only batteries which are not totally  
maintenance-free.  
Check the level of electrolyte in batteries filled with acid.  
Make sure the battery is fully charged before you carry out  
the check. If required:  
Checking the level of  
electrolyte in the battery  
n Top up each cell with distilled water until the lead plates  
are covered by approx. 1 cm of liquid.  
Note:  
Charging the battery  
We recommend using the automatic battery charger (part  
no. 6.654-116) for starter batteries. Use only battery  
chargers with test certification mark.  
Only undertake the charging procedure in dry, weather-  
protected areas.  
n Bring machine to a halt, pull out ignition key  
n Tip seat forwards and open unit cover  
n Connect positive post (+) to battery charger (red pole  
clamp)  
n Connect negative post (–) to battery charger (black pole  
clamp)  
n Connect battery charger to mains power supply and  
switch on if applicable. Charging period as specified by  
the battery charger manufacturer.  
45  
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English  
User Instructions  
KMR 1250 B  
The sealing skirts fulfil an important function. They retain the  
partial vacuum in the area round the brushes which is es-  
sential so that the sweeper can function properly. They  
ensure that sweeping can take place without clouds of dust  
being formed at the same time. If the sealing skirts are  
damaged or worn out, they must be replaced immediately.  
Replacing the sealing skirts  
n Park the sweeper and switch off the engine.  
n Remove the retaining screws and detach the sealing  
skirts.  
n Fit new skirts, and align them as follows:  
The side skirts should be adjusted so that they clear the  
ground by 1–3 mm.  
Direction of travel  
The rear skirt should be adjusted so that they clear the  
ground by 1–5 mm.  
n The front skirt cannot be adjusted. Replace the skirt as  
soon as you see signs of excessive wear.  
n Tighten the retaining screws.  
Replacing the side brush  
n Park the sweeper and switch off the engine.  
n Raise the side brush.  
n Remove the three hex-socket bolts (5 mm Allen key).  
n Detach the side brush.  
n Push the new side brush onto the drive pin.  
n Refit and tighten the three hex-socket bolts.  
Replace light unit  
n Stop the machine and turn it off.  
n Take out the ignition key.  
n Undo 6 screws S on the panel.  
n Remove the panel 1.  
n Unscrew the Phillips screw between the supports of the  
lamp holder on the defective headlight.  
n Turn the lens of the defective headlight anti-clockwise  
about 1/4 of a turn 2 and take out reflector housing 3.  
n Replace light unit.  
n Insert reflector housing with new light unit in panel again  
from below and secure with about 1/4 of a turn clockwi-  
se. Make certain it engages properly, the label  
HALOGEN on the headlight glass must be able to be read  
horizontally 4.  
n Screw in again the screw between the supports, then  
secure the panel with the 6 screws.  
46  
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KMR 1250 B  
User Instructions  
English  
Adjusting the sweeping  
pattern  
(only valid for main brush roller with  
”fixed setting”)  
n Open the unit cover and secure it in place.  
ç The sweeping pattern can be altered by turning the cen-  
tral adjusting knob.  
– To increase size of sweeping pattern: turn adjusting  
knob counter-clockwise (towards +).  
– To reduce size of sweeping pattern: turn adjusting  
knob clockwise (towards –).  
After any adjustments have been made, check the sweeping  
pattern.  
n Drive the sweeper onto a dusty surface and apply the  
parking brake.  
n Lower the main brush (lever set to middle position) and  
allow it to brush the floor for several seconds.  
n Raise the main brush and drive backwards a short di-  
stance with the bulk waste flap open (first release the  
parking brake).  
n The width of the sweeping pattern should be 30–50 mm.  
Note:  
The shape of the sweeping pattern should not be trapezoi-  
dal. If it is, call customer service.  
47  
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English  
User Instructions  
KMR 1250 B  
Replacing the main brush  
roller  
n Park the sweeper and switch off the engine  
n Lower the brush roller.  
n Open the RH side flap 1 (seen in direction of travel).  
n Undo the retaining bolt on the lower forked head 2 and  
swivel the push rod towards the rear.  
n Unscrew the knurled knob 3.  
n Remove the oscillating linkage 4.  
n Open the flap over the end of the brush roller 5 (turn-lock  
fastener).  
n Pull out the brush roller 6.  
n Screw in the knob for adjusting the sweeping pattern as  
far as it will go (clockwise, towards –).  
n Fit the new brush roller in reverse order to the removal  
procedure.  
Brush roller seen from above  
Note:  
Make sure the bristles point in the right direction – see  
illustration.  
n Set up the sweeping pattern by turning the adjusting knob  
see “Adjusting the sweeping pattern”.  
Direction of travel  
48  
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KMR 1250 B  
User Instructions  
English  
Replacing fuses  
n Park the sweeper and switch off the engine.  
n Open the unit cover.  
n Replace a defective fuse with one of the same current  
value.  
Note:  
Repeated defects of the same fuse indicate a technical fault  
in the electrical system. Please call Kärcher Customer  
Service.  
Replacing the dust filters  
The dust filters should be inspected for damage every 50  
operating hours.  
A significant build-up of dust at the air outlet from the fan is  
a sign of a filter that is not fitted properly or is defective.  
n Raise the hopper half way 1.  
n Release the catches on the filter box 2.  
n Swivel the filter box forwards and lift it off 3.  
n Open out the handle, pull it outwards and turn it through  
90º (make sure it engages) 4.  
n Remove the filter cartridge 5.  
n Insert a new filter cartridge (pins should fit into the  
holes) 6.  
n Set the handle back to its original position and lock it.  
Make sure the filter is correctly seated.  
n Mount the filter box and engage the catches.  
49  
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English  
User Instructions  
KMR 1250 B  
Troubleshooting  
Fault  
Possible cause  
Remedy  
Battery discharged  
Re-charge or replace batteries  
Engine does not start  
No fuel in tank  
Fuel tap closed  
Low oil level  
Fill up with fuel  
Open fuel tap  
Fill up with oil  
Hand lever (by-pass valve) on  
torque converter is at OFF  
Set hand lever to ON - see  
chapter on pushing the  
sweeper by hand  
Machine does not move  
V-belt torn  
Inform Customer Service  
Main brush roller and side  
brush  
V-belt to loose  
Check V-belt tension and  
adjust  
Main brush roller or side brush  
blocked with tape or similar  
Remove tape  
Seals on the machine worn, filter  
not installed correctly or  
defective  
Replace seals, mount filter  
correctly/replace  
Dust generation when  
sweeping  
Lever for sweeping mode  
wet/dry set to wet  
Set lever to “dry”  
Blower fan is not rotating  
Filter is blocked  
Check V-belt  
Clean or replace filter  
Replace  
Brushes worn out  
Machine sweeps badly  
Waste hopper is full  
Empty waste hopper  
Adjust sweeping pattern  
Sweeping pattern wrongly  
adjusted  
Fuse defective  
Change fuse or inform  
Customer Service  
High-emptying does not  
function  
Switch defective  
Inform Customer Service  
Inform Customer Service  
Inform Customer Service  
Hydraulic unit is defective  
Neutral position not correct  
Machine moves forwards  
or backwards when drive  
pedal is released  
50  
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KMR 1250 B  
User Instructions  
English  
Dimensions and weights  
Length  
Technical specifications  
1.650 mm  
Width  
Height  
1.000 mm  
1.270 mm  
450 kg  
Unladen weight (ready for operation)  
Max. permissible overall weight  
600 kg  
Driving and sweeping performance  
Max. travelling speed  
Max. climbing ability/gradient  
Effective sweeping width without side brush  
Effective sweeping width with 1 side brush 1.000 mm  
Effective sweeping width with 2 side brushes 1.300 mm  
* Travel speed for driving in traffic  
should be reduced from 8 to  
6 km/h and a 6 km/h sign  
8 * km/h  
18  
%
750 mm  
displayed, or ABS (mounting kit)  
StVZO (vehicle construction and  
use regulations) (Order no.  
2.638-754) displayed.  
Area rating (theoretical)  
without side brush  
with 1 side brush  
with 2 side brushes  
6.000 m²/h  
8.000 m²/h  
10.400 m²/h  
Waste container  
Theoretical capacity  
Max. usable capacity  
Lifting height  
100  
80  
L
L
1.430 mm  
m²  
Filter surface area  
6
Sweeping unit  
Brush roller with V-shaped rows of bristles  
Diameter of brush roller  
Diameter of side brush  
285 mm  
450 mm  
Vehicle tyres  
Pneumatic, diameter  
Type  
300 mm  
4.00-4  
Air pressure, front  
Air pressure, rear  
6
6
bar  
bar  
Lighting  
Light unit  
DIN 49848  
HS3 6V/2.4 W  
Engine  
Model  
Honda GX 270  
Type  
Cylinders  
4-stroke  
1
Capacity  
Output (9 HP at 3600 r.p.m.)  
270 cm³  
6.6 kW  
Fuel  
petrol, regular (lead free)  
Engine oil  
SAE15W40  
1.1  
L
Battery  
12 Volt  
44 Ah  
51  
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English  
User Instructions  
KMR 1250 B  
electric  
Starter  
Drive system  
Maintenance-free, fully enclosed hydrostatically driven axle  
with differential  
Hydraulic fluid  
Class  
DIN HVLP 51524/2  
46 c St /40 °C  
1.4  
Capacity *  
L
* We recommend Wintershall Wiolan HX 46 Hydraulic Fluid.  
Protection type  
typedrip-proof  
IPX3  
Ambient conditions  
- temperature  
- air humidity, not wet with dew  
-5 to + 40  
0 – 90  
°C  
%
Operating cycle  
Under favourable conditions, the sweeper has an operating  
cycle of 3 hours with a full fuel tank at the start. The actual  
time is dependent upon several factors:  
– surface structure of the ground and how level it is  
– how well the sweeper has been maintained  
– type of brush roller and its degree of wear.  
Noise emission  
Sound level (EN 60704-1)  
Guaranteed noise level  
(2000/14/EC)  
79  
dB(A)  
dB(A)  
101  
Machine vibration  
Rated vibration value  
(ISO 5349)  
< 2,5  
m/s²  
52  
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KMR 1250 B  
1.091-104.0  
1.091-124.0  
6.654-116.0  
6.618-090.0  
6.491-500.0  
>>MICROMP<< LADETECHNIK  
24V 30A Wa  
6.491-514.0  
6.414-532.0  
7.654-002.0  
6.348-316.0  
6.491-566.0  
6.348-337.0  
KMR  
0
6.435-288.0  
5
1
HER  
6.435-331.0  
6.491-596.0  
6.435-295.0  
6.435-289.0  
7.651-002.0  
6.651-382.0  
6.303-058.0  
6.303-125.0  
6.682-378.0  
5.031-452.0  
7.644-017.0  
7.644-007.0  
6.644-277.0  
6.435-295.0  
6.435-331.0  
7.644-018.0  
6.905-986.0  
7.312-003.0  
7.313-003.0  
7.306-501.0  
06/99 - S 1/2  
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KMR 1250 B  
1.091-104.0  
1.091-124.0  
KMR  
0
5
1
KARCHER  
5.190-055.0  
5.394-439.0  
5.190-082.0  
5.190-083.0  
5.365-215.0  
5.190-089.0  
5.365-216.0  
5.031-378.0  
5.190-084.0  
5.190-084.0  
6.905-982.0  
5.190-082.0  
06/99 - S 2/2  
4.038-524.0  
5.190-083.0  
5.365-215.0  
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