Kärcher HD 728 B CAGE Manual page 16

Risk of injury! Contact Customer Service if
the safety lever is damaged.
Risk of injury from high-pressure water jet.
Slide the safety catch on the trigger gun for-
ward before performing any work with the
appliance.
CAUTION
Environmental damage. Clean motors at
places with a corresponding oil separator
only.
Opening/closing the trigger gun
 To open the trigger gun: Actuate the
safety lever and trigger.
 To close the hand spray gun: Release
the safety lever and trigger.
Turning on the Appliance
 Open the water supply.
 Set the appliance switch at the engine
to "ON" and open the fuel supply valve.
 Start the motor with the trigger gun
open according to the operating instruc-
tions of the motor manufacturer.
Note:
The spray lance can be removed to facili-
tate the start-up process.
 Press the lever on the hand spray gun.
Select spray type
 Close the hand spray gun.
 Turn the casing of the nozzle till the de-
sired symbol matches the marking.
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
16
Operation with detergent
WARNING
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.
– Use only those detergents approved by
the manufacturer of the appliance.
– Kärcher detergents ensure smooth
functioning. Please consult us or ask for
our catalogue or our detergent informa-
tion sheets.
 Suspend end of suction hose in a con-
tainer filled with detergent.
 Set nozzle to "CHEM".
 Set dosing value for detergent to the
desired concentration.
Recommended cleaning method
– Loosen the dirt:
Spray detergent economically and let it
work for 1...5 minutes but do not let it
dry up.
– Remove the dirt:
Spray off loosened dirt with the high
pressure jet.
After operation with detergent
 Set dosing value for detergent to "0".
 Open the hand spray gun and rinse the
appliance for at least 1 minute.
Interrupting operation
 Close the hand spray gun.
Note:
If the trigger gun is closed, the motor con-
tinues to run at idling speed. The water thus
circulates within the pump and heats up.
When the cylinder head at the pump has
reached the maximum permissible temper-
ature (80 °C), the safety thermostat at the
cylinder head switches off the motor. The
device can be restarted after cooling down
to below 50 °C.
– 5
EN