Karcher KM 120/150 R P 2SB: Transport Storing the device Maintenance and care

     - 

10



Only KM 120/150 R G and R LPG: Un-

screw spark plugs and pour approx. 

3 cm³ of oil into the spark plug hole. 

Crank the engine several times before 

replacing the spark plug. Screw in the 

spark plug.



Secure sweeper to prevent it rolling 

away, lock parking brake.



Clean the inside and outside of the 

sweeper.



Park the machine in a safe and dry 

place.



Disconnect battery.



Charge battery approx. every 2 months.



Open cover and secure it (Diag. 3).

KM 120/150 R G:



Push lever in "OFF" direction.

KM 120/150 R D:



Turn lever to position "S". 



Close cover.



Close gas drawing valve by turning it in 

clock-wise direction. 

CAUTION

Risk of injury and damage! Observe the 

weight of the appliance when you transport 

it.

몇

Warning

In general, when shipping the machine, the 

freewheel lever must be engaged in the up-

per hole. Only once this has been done, will 

the travel drive be ready for operation. The 

machine must always be moved up or 

down slopes by engaging self-propulsion.



Turn ignition key to "0" and remove it.



Only KM 120/150 R G and R D: Empty 

tank. Draw off fuel using suitable pump.



Only KM 120/150 R LPG: Close the gas 

cylinder valve and remove the cylinder.  

Store the gas cylinder according to the 

safety regulations for LPG vehicles. 



Secure the wheels of the machine with 

wheel chocks.



Secure the machine with tensioning 

straps or cables.



Lock parking brake.

Note

Observe markings for fixing points on base 

frame (chain symbols). When loading or 

unloading the machine, it may only be op-

erated on gradients of max. 18%.

CAUTION

Risk of injury and damage! Note the weight 

of the appliance in case of storage.

Park the machine in a safe and dry place.



First switch off the appliance and re-

move the ignition key before performing 

any cleaning or maintenance tasks on 

the appliance, replacing parts or switch-

ing over to another function. 



Pull out the battery plug or clamp the 

battery while working on the electrical 

unit. 

–

Maintenance work may only be carried 

out by approved customer service out-

lets or experts in this field who are famil-

iar with the respective safety 

regulations. 

–

Mobile appliances used for commercial 

purposes are subject to safety inspec-

tions according to VDE 0701. 

–

Use only roller brushes/ side-brushes 

that are provided with the appliance or 

specified in the Operations Manual.  

The use of other roller brushes/ side-

brushes can affect the safety of the ap-

pliance. 

–

Do not clean the appliance with a water 

hose or high-pressure water jet (danger 

of short circuits or other damage).



Danger

Risk of injury! Wear dust mask and protec-

tive goggles.



Open cover and secure it (Diag. 3).



Clean machine with a cloth.



Blow through machine with com-

pressed air.



Close cover.



Clean the machine with a damp cloth 

which has been soaked in mild deter-

gent.

Note

Do not use aggressive cleaning agents.

Note

The elapsed-time counter shows the timing 

of the maintenance intervals.

Daily maintenance:



Check engine oil level.



Check axle drive oil level.



Check tyre pressure.



Only KM 120/150 R LPG: Check gas 

pipes and connecting screws. 



Only KM 120/150 R LPG: Check gas fil-

ter in the screw to the gas cylinder to 

see if it is dirty, clean it if required (every 

time you change the cylinder). 



Check function of all operator control el-

ements.

Weekly maintenance:



Check leakiness of fuel or gas connec-

tions. 



Check return-line filter for sweeping 

system.



Check air filter.



Check oil level of sweeper hydraulics.



Check hydraulic lines for leaks.



Check moving parts for freedom of 

movement.



Check the sealing strips in the sweep-

ing area for position and wear.

Maintenance to be carried out every 100 

operating hours:



Check leakiness of fuel or gas connec-

tions. 



Change engine oil (initial change after 

20 operating hours).



Only KM 120/150 R G and R LPG: 

Check spark plug.



Check function of seat contact mat.



Check battery acid level.

Close fuel tap (only KM 120/150 R G 

and R D)

Close gas supply (only KM 120/150 

R LPG)

Transport Storing the device Maintenance and care

General notes

Cleaning the inside of the machine

External cleaning of the appliance

Maintenance intervals

Maintenance by the customer

30 EN

     

- 

11



Check tension, wear and function of 

drive belts (V-belt and circular belt).

Maintenance following wear:



Replace sealing strips.



Replace roller brush.



Replace side brush.

For description, see section on Mainte-

nance work.

Note

Where maintenance is carried out by the 

customer, all service and maintenance 

work must be undertaken by a qualified 

specialist. If required, a specialised Kärch-

er dealer may be contacted at any time.

Maintenance to be carried out after 20 op-

erating hours:



Carry out initial inspection.

Maintenance to be carried out every 100 

operating hours

Maintenance to be carried out every 200 

operating hours

Maintenance to be carried out every 300 

operating hours

Note

In order to safeguard warranty claims, all 

service and maintenance work during the 

warranty period must be carried out by the 

authorised Kärcher Customer Service in 

accordance with the maintenance booklet.

Preparation:



Park the sweeper on an even surface.



Turn ignition key to "0" and remove it.



Lock parking brake.



Danger

Risk of injury! While working around the lift/

tilt emptying mechanism, raise the waste 

container to its highest point and secure.



Insert safety support into the piston rod 

for the lifting cylinder and secure it.



Danger

Risk of injury due to engine overrun. Once 

the engine has been switched off, wait for 5 

seconds. Stay well clear of the working 

area for this time.



Allow the machine sufficient time to cool 

down before carrying out any mainte-

nance and repair work.

Do not touch any hot parts, such as the 

drive motor and exhaust system.

Please observe the following warning notes 

when handling batteries:



Danger

Risk of explosion! Do not put tools or similar 

on the battery, i.e. on the terminal poles 

and cell connectors.



Danger

Risk of injury! Ensure that wounds never 

come into contact with lead. Always clean 

your hands after having worked with batter-

ies.



Open cover and secure it (Diag. 3).



Insert battery in battery mount.



Screw on mounts on battery base.



Connect pole terminal (red cable) to 

positive pole (+).



Connect pole terminal to negative pole 

(-).



Danger

Risk of injury! Comply with safety regula-

tions on the handling of batteries. Observe 

the directions provided by the manufacturer 

of the charger.



Disconnect battery.



Connect positive terminal cable from 

the charger to the positive pole connec-

tion on the battery.



Connect negative terminal cable from 

the charger to the negative pole con-

nection on the battery.



Plug in mains connector and switch on 

charger.



Charge battery using lowest possible 

level of charging current.

몇

Warning

Regularly check the fluid level in acid-filled 

batteries.



Unscrew all cell caps.



Where fluid level is too low, top up cells 

to the mark provided with distilled wa-

ter.



Charge battery.



Screw in cell caps.

Note

Before removing the battery, make sure 

that the negative pole lead is disconnected. 

Check that the battery pole and pole termi-

nals are adequately protected with pole 

grease.



Open cover and secure it (Diag. 3).



Disconnect battery.



Remove the battery from the battery 

holder.



Dispose of the used battery according 

to the local provisions.

Note

After the machine is switched on, the num-

ber of operating hours is displayed for 10 

seconds. The fuel gauge is then automati-

cally displayed.

Note

The fuel gauge shows the length of time the 

machine has been in operation since the 

elapsed-time counter was last reset.

Note

The machine can be operated for a maxi-

mum of 3 hours on a full tank.



Check fuel gauge for elapsed-time 

counter.

Maintenance by Customer Service

Maintenance Works

General notes on safety

Please do not release engine 

oil, fuel oil, diesel and petrol 

into the environment. Protect 

the ground and dispose of 

used oil in an environmentally-

clean manner.

Safety notes regarding the batteries

Observe the directions on the 

battery, in the instructions for 

use and in the vehicle operat-

ing instructions!

Wear an eye shield!

Keep away children from acid 

and batteries!

Risk of explosion!

Fire, sparks, open light, and 

smoking not allowed!

Danger of causticization!

First aid!

Warning note!

Disposal!

Do not throw the battery in the 

dustbin!

Installing and connecting the battery

Charging battery

Check fluid level in the battery and ad-

just if required

Remove the battery

Check fuel indicator (only KM 120/150 

R G and R D)

31 EN

     - 

12



Check gas filter in the screw to gas cyl-

inder to see if it is dirty. 



Clean dirty filters with compressed air. 

Note

Inspection must be carried out by a quali-

fied specialist.



Check gas connections, pipes and 

evaporators using leak-search spray for 

leaks. 

Note

Leaks in the gas cylinder cause formation 

of crusts or yellow frothy deposits on the 

gas connections, pipes and evaporator.  

Contact Kärcher Customer Service for 

maintenance of the gas unit.



Park the sweeper on an even surface.



Connect air pressure testing device to 

tyre valve.



Check air pressure and adjust if re-

quired.



Set air pressure for the front and rear 

tyres at 6 bar.



Danger

Risk of injury!



Park the sweeper on an even surface.



Remove ignition key.



When carrying out repairs on public 

highways, wear warning clothing when 

working close to passing traffic.



Check stability of ground. Also secure 

the machine with wheel chock(s) to pre-

vent it rolling away.



Lock parking brake.

Check tyres



Check tyre contact face for foreign ob-

jects.



Remove objects found.



Use suitable, commercially available 

materials to carry out tyre repairs.

Note

Observe the manufacturer's recommenda-

tions. The journey may be resumed provid-

ing that the directions supplied by the 

product manufacturer have been observed. 

The tyre/wheel change should nonetheless 

be carried out as soon as possible.



Open quick-release locks on the rele-

vant side panel.



Remove side panel.



Loosen wheel nuts.



Position vehicle jack at the appropriate 

mounting point for the front or rear 

wheel.



Raise machine using vehicle jack.



Remove wheel nuts.



Remove wheel.



Mount spare wheel.



Screw on wheel nuts.



Lower machine using vehicle jack.



Tighten wheel nuts.



Screw on side panel.

Note

Use a suitable commercially available vehi-

cle jack.

몇

Warning (only KM 120/150 R G and R 

LPG)

The engine is equipped with an oil deficien-

cy switch. When the fill level is insufficient, 

the engine switches off and can only be re-

started once the engine oil has been re-

plenished.



Danger

Risk of burns!



Allow engine to cool down.



Wait for at least 5 minutes after switch-

ing off the engine before checking the 

engine oil fill level.



Open cover and secure it (Diag. 3).

KM 120/150 R G and R LPG:

KM 120/150 R D:



Pull out oil dipstick.



Wipe off oil dipstick and insert.



Pull out oil dipstick.

Note

Oil must be present on at least one third of 

the oil dipstick. If the oil level is less than 

this, top up engine oil until it reaches the 

lower edge of the filler opening.



Only KM 120/150 R G and R LPG: Dis-

mantle the extension piece at the oil fill-

er opening.



Top up engine oil using 6.491-538 oil-

change pump.



Only KM 120/150 R G and R LPG: In-

stall the extension piece at the oil filler 

opening.



Close oil filler opening.



Wait at least 5 minutes.



Check engine oil level.

Oil grade: see Technical Data



Pull out oil dipstick.



Only KM 120/150 R G and R LPG: Dis-

mantle the extension piece at the oil fill-

er opening.



Suck off engine oil using 6.491-538 oil-

change pump.



Fill in new engine oil using 6.491-538 

oil-change pump.

Oil grade: see Technical Data



Only KM 120/150 R G and R LPG: In-

stall the extension piece at the oil filler 

opening.



Close oil filler opening.



Wait at least 5 minutes.



Check engine oil level.

Only KM 120/150 R G and R LPG: The mo-

tor oil can be drained via a hose.



Danger

Risk of burns due to hot oil!



Ready a catch bin for appr. 1.5 litre oil.



Allow engine to cool down.



Open quick-release locks on the left-

hand side panel.



Remove side panel.



Remove the oil drain hose from the 

holder.



Unscrew oil drain plug.



Pull out oil dipstick.



Drain off oil.



Screw in oil drain plug.



Insert the oil drain hose in the holder. 

Check gas filter (only KM 120/150 R LPG)

Check gas connections (only KM 120/

150 R LPG)

Check the tyre pressure

Replacing wheel

Check engine oil level and top up, if re-

quired

Change the engine oil

32 EN

     

- 

13



Open cover and secure it (Diag. 3).

KM 120/150 R G and R LPG:

KM 120/150 R D:



Unscrew wing nut.



Remove, check and clean filter car-

tridge.



Use either a new or cleaned filter car-

tridge in the vacuum container.



Screw on wing nut.



Open cover and secure it (Diag. 3).



Remove spark-plug connector.



Unscrew and clean spark plug.



Screw in cleaned or new spark plug.



Push on spark-plug connector.

Note

The sweeper is equipped with 2 hydraulic 

circuits.

Note

Drive in the waste container to check/ cor-

rect the filling status. 

The cap with the oil dipstick is located in the 

storage tank above the right rear wheel. 



Open cover and secure it (Diag. 3).



Loosen screws (1).



Remove panel (2).



Open the lock with the oil dipstick (3).



Check oil level using the oil dipstick.

Note

The oil level must lie between “MIN“ and 

“MAX“.



Top up hydraulic oil if necessary. 



Close container.



Screw on panel.

Oil grade: see Technical Data

Note

The sweeper is equipped with 2 hydraulic 

circuits.



(1) Checking fill level



Raise waste container.



Insert safety support into the piston rod 

for the lifting cylinder and secure it.



Check the fill level in the header tank.

Note

The oil level must lie between the “MAX“ 

mark and a distance of 2 cm above the 

base of the tank.

몇

Warning

This inspection may only be carried out 

when the engine is cold.



(2) Adjusting fill level



Raise waste container.



Insert safety support into the piston rod 

for the lifting cylinder and secure it.



Remove the lid of the container.



If required, top up oil carefully.



Close container.

Oil grade: see Technical Data



(3) Changing oil



Raise waste container.



Insert safety support into the piston rod 

for the lifting cylinder and secure it.



Unscrew oil drain plug.



Remove the lid of the container.



Drain off oil.



Screw in oil drain plug.



Replenish oil.



Close container.



The oil filter needs to be cleaned or re-

placed if the manometer display is in 

the red area.



Park the sweeper on an even surface.



Set programme switch to step 1 (driv-

ing). Side brushes lift up.



Turn ignition key to "0" and remove it.



Check side brush.

Note

The side brush floating mounting adjusts 

the sweeping track as the bristles wear 

down. The side brush must be replaced if it 

becomes too worn.



Park the sweeper on an even surface.



Set programme switch to step 1 (driv-

ing). Side brushes lift up.



Turn ignition key to "0" and remove it.



Loosen 3 retaining nuts on underside.



Clip side brush on to driver and screw 

on.



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.



Remove belts or cords from roller 

brush.

Replacement is due if a visible deteriora-

tion in sweeping performance caused by 

bristle wear is evident.



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 quick-release locks on the right-

hand side panel.

Check air filter and replace, if necessary

Clean and change spark plug (only KM 

120/150 R G and R LPG)

Check and adjust fill level of hydraulic 

fluid – sweeping hydraulics circuit

Check and adjust hydraulic fluid fill level 

and change oil – axle drive circuit

Check oil filter/Check backflow pressure

Check side brush

Replacing side brush

Checking roller brush

Replacing roller brush

33 EN

     - 

14



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

34 EN

     

- 

15 

Danger

Empty waste container before replacing 

dust filter. Wear a dust mask when working 

around the dust filter. Observe safety regu-

lations on the handling of fine particulate 

material.



Slightly raise the waste container and 

tipp it a little.



Disconnect filter motor from power sup-

ply (1).



Disconnect the plug connection of the 

limit switch.



Loosen the screw joint of the filter agita-

tor motor.



Open catches (2).



Slightly tip the filter box backwards and 

take it out (3).



Loosen filter mount (1), turn (2) and pull 

out.



Remove louver filter (3).



Insert new filter.



Make sure driver engages with grooves 

on drive side.



Snap filter mount back on and tighten 

screws.

Note

Make sure when installing the new filter 

that the fins are not damaged and the filter 

case seal does not get jammed. 



Lift filter case seal out of groove in the 

cover.



Insert new seal.



Danger

The engine requires approx. 3-4 seconds 

to come to a standstill once it has been 

switched off. During this time, stay well 

clear of the working area.



Turn ignition key to "0" and remove it.



Open cover and secure it (Diag. 3).



Check tension of drive belt and V-belt of 

the suction blower, also check for wear 

or damage.



Check tension of drive belt and V-belt of 

the roller brush also check for wear or 

damage.



Only KM 120/150 R LPG and KM 120/

150 with driver cabin:

Check tension of drive belt and V-belt of 

the light machine; also check for wear 

or damage.



Chek the cup seal at the suction blower 

regularly to see that it sits properly.



Turn ignition key to "0" and remove it.



Remove side brush.



Remove splash guard (1).



Disconnect plug (2).



Twist contact plate to one side (3).



Remove defective bulb (4).



Insert new bulb.



Twist contact plate back into original 

position.



Connect plug.



Mount splash guard.



Screw on side brush.

The drive control/electronic system is in-

stalled behind the front panel. To replace a 

fuse, the front panel must be removed.



Loosen screws on both sides of the 

panel.

Note

The assignment of fuses is indicated on the 

inside of the front panel. Only use fuses 

with identical safety ratings.



Replace defective fuses.



Replace front panel.



Open cover and secure it (Diag. 3).



Replace defective fuse.

Replacing dust filter

Replacing filter case seal

Checking drive belt

Check cup seal

Replacing electric bulb

Replacing fuses of drive control/ elec-

tronic system

Replacing electrical starter in the engine 

room (only KM 120/150 R D)

35 EN