Safety Devices; Overflow Valve - Kärcher HD 728 B CAGE Manual Original

Symbols on the machine
High-pressure jets can be dan-
gerous if improperly used. The jet
may not be directed at persons,
animals, live electrical equipment or at the
appliance itself.
Risk of poisoning! Do not inhale
exhaust fumes.
Risk of burns! Beware of hot
components.
WARNING
Observe regulations of water supplier.
According to applicable regula-
tions, the appliance must never be
used on the drinking water net
without a system separator. A suit-
able system separator by KÄRCHER or al-
ternatively a system separator according to
EN 12729 type BA must be used.
Water that was flowing through a system
separator is considered non-drinkable.
– Please follow the national rules and
regulations for fluid spray jets of the re-
spective country.
– Please follow the national rules and
regulations for accident prevention of
the respective country. Fluid spray jets
must be tested regularly and the results
of these tests must be documented in
writing.
– The appliance/accessories must not be
modified.

Safety Devices

Safety devices serve to protect the user
and must not be rendered in operational or
their functions bypassed.
14
General
– If the hand spray gun is closed, the
overflow valve opens and the high pres-
sure pump diverts the water back to the
pump suction side. Thus the permissi-
ble working pressure is not exceeded.
– The overflow valve is set by the manu-
facturer and sealed. Setting only by
customer service.
Safety thermostat at the pump
The safety thermostat switches off the mo-
tor when the maximum permissible temper-
ature has been exceeded.
DANGER
Risk of injury! Device, tubes, high pressure
hose and connections must be in faultless
condition. If they are not in a perfect state
then the appliance must not be used.
Check oil level of the high pressure
 Check oil level in the oil tank.
The oil level must lie between "MIN"
and "MAX" marking.
 Add oil if required (see technical speci-
fications).
Follow the instructions given in the sec-
tion "Safety Instructions"!
 Read the operating instructions of the
engine manufacturer before start-up
and follow the safety instructions care-
fully.
 Fill the fuel tank with unleaded petrol.
Do not use 2-speed mixture.
 Check oil level of the engine.
Do not operate the appliance if the oil level
has fallen below "MIN".
 If required, top up oil carefully.
EN – 3

Overflow valve

Start up
pump
Motor