Karcher HD 1050 B - Manual (Page 18)

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 Oil change.
Oil change:

Ready a catch bin for appr. 1 Liter oil.
 Turn out the oil drain screw.
 Drain the oil in a collection basin.
 Turn out the oil drain screw.
 Slowly fill in new oil until the "MAX"
marking on the oil sight glass.
Note: Air pockets must be able to leak out.
For oil type refer to technical specifica-
tions.
ṇ
Warning
Risk of injury if the machine is left running
in an unattended state. Remove the spark
plug before doing any work on the appli-
ance.
Risk of burns! Do not touch hot silencers,
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).
– Nozzle is set to "CHEM"
 Set nozzle to "High pressure".
– Nozzle is blocked/ washed out
 Clean/ replace nozzle.
– Filter at the water connection is dirty
 Clean filter.
– Air within the system
 Appliance ventilation:
– 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.
– Inlet pipes to the pump are leaky.
 Check all inlet pipes to the pump.
– Air within the system
 Appliance ventilation:
– Nozzle is set to "High pressure"
 Set nozzle to "CHEM".
– 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
 Clean/ replace backflow valve in the
connection of the detergent suction
hose.
– Detergent dosing valve is closed or
leaky/ blocked
 Open or check/clean detergent dosing
valve.
If malfunction can not be fixed, the de-
vice must be checked by customer ser-
vice.
After 500 operating hours, at least annu-
ally
Maintenance Works
High-pressure pump
Dispose of old oil ecologically or turn it in
at a collection point.
Troubleshooting
Appliance is not running
Device is not building up pressure
Device leaks, water drips from the
bottom of the device
Pump is vibrating
Detergent is not getting sucked in
18 EN