Maintenance Intervals; Maintenance Works; Troubleshooting - Kärcher HD 9/23 DE Manual Original

Maintenance intervals

Daily
 Check the high pressure hose for dam-
ages (risk of bursting). Please arrange
for the immediate exchange of a dam-
aged high-pressure hose.
Weekly
 Check oil level.
Please contact Customer Service immedi-
ately if the oil is milky (water in oil).
Monthly
 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.
After 500 operating hours, at least
annually
 Have the maintenance of the device per-
formed by the customer service.
 Change the oil in the high pressure pump.

Maintenance Works

Clean water filter.
 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 in high pressure pump
 Ready a catch bin for appr. 1 Liter oil.
 Turn out the oil drain screw.
 Drain the oil in a collection basin.
Dispose of old oil ecologically or turn it in at
a collection point.
 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
escape.
For oil type refer to technical specifications.
22

Troubleshooting

DANGER
Risk of injury if the device starts up acci-
dentally. Before working on the device, turn
the starter to "0".
Risk of burns! Do not touch hot mufflers,
cylinders or radiator ribs.
Motor does not run
Follow operating instructions of the engine
manufacturer!
Device is not building up pressure
– 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.
Device leaks, water drips from the
bottom of the device
– Pump leaky
Note: 3 drops/minute are allowed.
 With stronger leak, have device
checked by customer service.
Detergent is not getting sucked in
– High pressure nozzle is installed
 Install the low pressure nozzle.
– Detergent suction hose with filter is
leaky or blocked
 Check/ clean detergent suction hose
with filter.
– Backflow valve in the connection of the
detergent suction hose is jammed
EN – 8