Kärcher HD 9/21 G, Manual

Page: 12 / 27

– 8
 Check the high pressure hose for dam-
ages (risk of bursting). Please arrange
for the immediate exchange of a dam-
aged high-pressure hose.
 Check oil level.
Please contact Customer Service immedi-
ately if the oil is milky (water in oil).
 Clean water filter.
 Clean filter at the detergent suck hose.
 Check the fastening elements between
the motor and frame for cracks; have
cracked fastening elements replaced by
Customer Service.
 Have the maintenance of the device
performed by the customer service.
 Change the oil in the high pressure pump.
 Shut off water supply.
 Unscrew the covering nut.
 Remove the filter cup towards the bottom.
 Clean filter inlay and filter cup.
 Check the O-rings for proper seating.
 Insert the filter inlay into the filter cup.
 Replace the filter cup.
 Screw on and tighten the union nut.
Oil change:
 Ready a catch bin for appr. 1 Liter oil.
 Turn out the oil drain screw.
 Drain the oil in a collection basin.
 Screw in the oil drain screw.
 Fill in new oil up to the middle of the oil
sight glass.
Add oil slowly so that air bubbles can es-
cape.
For oil type refer to technical specifica-
tions.

DANGER
Risk of injury if the machine is left running
in an unattended state.
Before working on the device, turn the start-
er to "0/OFF" and remove the spark plug
connector.
Risk of burns! Do not touch hot mufflers,
cylinders or radiator ribs.
Follow operating instructions of the engine
manufacturer!
– Operating speed of the engine is too
low
 Check operating speed of the engine
(refer to technical data).
– Low-pressure nozzle is installed.
 Install the high pressure nozzle.
– Nozzle is blocked/ washed out
 Clean/ replace nozzle.
– Water filter contaminated
 Clean water filter.
– Air within the system
 Deaerate the appliance (see "Start-up")
– Amount of water supply is too low.
 Check water supply level (refer to tech-
nical data).
– Pipe inlets to pump are leaky or blocked
 Check all inlet pipes to the pump.
– Pump leaky
Note: 3 drops/minute are allowed.
 With stronger leak, have device
checked by customer service.
Maintenance intervals
Daily
Weekly
Monthly
After 500 operating hours, at least
annually
Maintenance Works
Clean water filter.
Oil change in high pressure pump
Dispose of old oil ecologically or turn it in at
a collection point.
Troubleshooting
Motor does not run
Device is not building up pressure
Device leaks, water drips from the
bottom of the device
24 EN