Karcher HD 9-18-4 ST: Transport Storing the device Maintenance and care

     

- 

5

Note:

The appliance is equipped with a pressure 

switch. The motor starts up only when the 

lever of the pistol is pulled



Open the water supply.



Plug in the mains plug.

(Only with appliance versions with pow-

er cable and mains plug).



Set the appliance switch to "I".

The indicator lamp glows green.



Unlock the trigger gun and pull the lever 

of the gun.



Set working pressure and water quanti-

ty by turning (rungless) at the pressure 

and quantity regulation (option) (+/-).



Close the hand spray gun. 



Turn the casing of the nozzle till the de-

sired symbol matches the marking.

몇

CAUTION

Unsuitable detergents can cause damage 

to the appliance and to the object to be 

cleaned. Use only those detergents that 

have been approved by Kärcher. Observe 

the dosage and other instructions provided 

with these detergents. For considerate 

treatment of the environment use detergent 

economically.

Follow the safety instructions for using de-

tergents.

Kärcher detergents ensure smooth func-

tioning. Please consult us or ask for our cat-

alogue or our detergent information sheets. 



Place the detergent can under the de-

vice.



Hang in the detergent hose into the de-

tergent can.



Set nozzle to "CHEM". 



Set dosing value for detergent to the 

desired concentration. 



Spray the detergent sparingly on the 

dry surface and allow it to react, but not 

to dry.



Spray off loosened dirt with the high-

pressure ray.



After operations, dip the filter in clear 

water. Turn the dosing valve to the 

highest detergent concentration. Start 

the appliance and rinse for one minute.



Release the lever of the trigger gun; the 

device will switch off.



Release again the lever of the trigger 

gun; the device will switch on again.

The operational readiness period starts 

when the hand-spray gun is closed. The 

device can no longer be started by tighten-

ing the lever of the hand-spray gun if this 

operational readiness period (5 to 0.120 

minutes) expires.

The indicator lamp blinks green.



To restart, turn the device switch briefly 

to "0" and then again to "I". 

Note:

Customer service can set the operational 

readiness period.



Set the appliance switch to "0".



Wait for a while.



Set the appliance switch to "I".

or



Use the respective button on the re-

mote control (option).



Set the appliance switch to "0".



Disconnect the mains plug from the 

socket.

(Only with appliance versions with pow-

er cable and mains plug).



Shut off water supply.



Activate trigger gun until device is pres-

sure-less.



Press the safety lever of the trigger gun 

to secure the lever of the pistol against 

being released accidentally.

ATTENTION

Frost will destroy the not completely water 

drained device.

The machine should be stored in frost-free 

rooms. In case there is frosting risk, for e.g. 

if the machine is installed in open areas, 

then the machine must first be emptied and 

flushed using an anti-freezing agent.



Remove the water inlet hose on the ap-

pliance.



Unscrew the high pressure hose from 

the appliance.



Let the appliance run till the pump and 

pipes are empty (max. 1 minute).

In case of longer operational breaks:



Fill in normal anti-frost agents in the 

swimmer tank right until the top. 



Place the collection trough unter the 

high pressure exit. 



Turn on the equipment and let it run un-

til the equipment is completely rinsed. 



Turn the emergency-stop switch to "0". 



Shut off water supply.



Activate trigger gun until device is pres-

sure-less.



Unscrew the fastening screw of the ap-

pliance cover.



Slightly lift up the appliance cover and 

remove it toward the front.

몇

CAUTION

Risk of injury and damage! Observe the 

weight of the appliance when you transport 

it.



When transporting in vehicles, secure 

the appliance according to the guide-

lines from slipping and tipping over.

몇

CAUTION

Risk of injury and damage! Note the weight 

of the appliance in case of storage.



DANGER

Risk of injury! Switch off the power switch 

with all maintenance and repair work.

Pull the mains plug and secure it against 

being plugged in again



DANGER

Risk of injury on account of the emanating 

water jet that could be hot!

During all tasks:

–

Close locking tap of fresh water.

–

Let the hot parts of the plant cool down. 

–

Depressurise the plant by opening all 

hand-spray guns. 

The bases of a safe operating of the equip-

ment is thr regularly maintenance accord-

ing to the following maintenance plan.

Use exclusively original parts of the manu-

facturer or those parts recommended by 

him like

– replacement and wear parts

– Accessory parts

– Fuel

– Detergent

High pressure operation

Select spray type

High pressure circular spray 

(0°) for specially stubborn dirt

Flat low pressure spray 

(CHEM) for operating using de-

tergents or cleaning at low 

pressure. 

High pressure flat spray (25°) 

for large dirt areas

Operation with detergent

Recommended cleaning method

Interrupting operation

Operational readiness period

Restart the operation readiness time

Turn off the appliance

Frost protection

Emptying the appliance

Switch-off in case of emergency

Remove the appliance cover

Transport Storing the device Maintenance and care

22

EN

     - 

6

You can sign with your dealer a contract for 

regular safety inspection or even sign a 

maintenance contract. Please take advice 

on this matter.

Safety inspection/ maintenance 

contract

Maintenance schedule

Time

Activity

Assembly affected

Performance

of whom

daily

Check hand-

spray gun

Hand spray gun

Check whether the hand-spray gun closes tightly 

without any leaks. Check the protection mechanism 

against accidental switching. Replace defective 

hand-spray guns. 

Operator

opinion

Power cord

(Only with appliance versions 

with power cable and mains 

plug).

Check the mains cable regularly for damage such as 

aging or formation of cracks. If you find a damage, 

then the cable must be replaced before using it any 

further. 

Operator/

Customer 

Service

Test fill level

Detergent tank, Installation wa-

ter softener (optional)

Check filling level, refill if necessary.

Operator

Check high pres-

sure hoses

Outlets, hoses towards working 

machine

Check hoses to see if there are damages. Replace 

defect hoses immediately. Danger of accident!

Operator

weekly or after 

40 operating 

hours

Check the unit for 

leaks

Entire plant

Check pumps and pipes for leaks. Inform Customer 

Service if there is oil loss or if there is a leakage of 

more than 10 drops of water per minute. 

Operator/

Customer 

Service

Check oil level

Oil tank at the pump

If the oil is milky, it needs to be replaced.  It is recom-

mended likewise in this case that the pump's oil seal 

be changed (Customer Service).

Operator/

Customer 

Service

Check oil level

Oil tank at the pump

Check oil level of the pump. Refill oil if required (Or-

der no. 6.288-016)

Operator

Clean filter

Filter at the detergent suck hose Clean filter at the detergent suck hose.

Operator

Test vibration 

dampener

Vibration dampener

If the vibration of the pump increases it indicates that 

the pressure tank is defective.  Replace the vibration 

dampener.

Customer 

Service

monthly or after 

200 operating 

hours

Cleaning the 

sieve

Sieve in water inlet

Check, dismantle sieve and clean it.

Operator

Test swimmer 

valve

Float tank

When the swimmer valve is closed no water can es-

cape the overflow. 

Operator

Test automatic 

start

Pressure switch

Pump is at a standstill, because no water removal 

has taken place. Turn on the hand spray gun. If the 

pressure in the high pressure network falls below 3 

MPa, the pump must be turned on.

Operator

Tighten hose 

clips

All hose clips

Tighten the hose clips using a torque wrench. Tight-

ening torque up to a diameter of 28 mm = 2Nm, from 

29 mm = 6 Nm.

Operator

annually or after 

1000 operating 

hours

Oil change

High-pressure pump

Drain off oil. Refill oil. Check oil level in the oil tank. Operator

Check unit for 

calcium deposits. 

entire water system

Improper functioning of valves or pumps can be an 

indication of calcium deposits. If necessary decalcify.

Operator 

trained in de-

calcification

annual

Safety check

Entire plant

Safety check according to the guidelines for fluid 

spraying equipment.

Technical ex-

pert

23

EN