Kärcher K 3.740, User Instruction

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18 English
Please use exclusively KÄRCHER deter-
gents and care products to carry out the re-
spective cleaning task, as these were
specifically developed for your appliance.
The use of other detergents and care prod-
ucts may lead to premature wear and can
invalidate your warranty claims. Please ob-
tain information at your local dealer or re-
quest information directly from KÄRCHER.

Fill the detergent solution in the deter-
gent tank (observe dosage instructions
on the packaging of the detergent).
 Illustration
Pull detergent suction hose as far as is
required out of the housing.
Suspend end of detergent suction hose
in a container filled with detergent.
 Use spray lance with pressure regula-
tion (Vario Power).
 Turn the spray lance to "Mix" position.
Note: This will mix the detergent with
the water stream.
 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 jet.
 Release the lever on the trigger gun.
 Lock the lever on the trigger gun.
 During longer breaks (more than 5 min-
utes), also turn the appliance off using
the "0/OFF" switch.
 Insert the trigger gun in its holder.
Caution
Only separate the high-pressure hose from
the trigger gun or the appliance while there
is no pressure in the system.
 After working with detergent, suspend
detergent suction hose in a container
filled with clear water, switch the appli-
ance on for around 1 minute once the
spray lance has been removed and
rinse until water runs clear.
 Release the lever on the trigger gun.
 Turn off the appliance "0/OFF".
 Turn off tap.
 Press the lever on the trigger gun to re-
lease any remaining pressure in the
system.
 Detach the appliance from the water
supply.
Caution
When disconnecting the supply or high
pressure hose, hot water may leak from
the connections after operation.
 Lock the lever on the trigger gun.
 Pull out the mains plug.
Working with detergent
Recommended cleaning method
Interrupting operation
Finish operation