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Small repairs - do it yourself
Small repairs - do it yourself
Having closed the trigger gun with safe-
ty catch, the high-pressure cleaner must
shut down and the stainless steel pressure
gauge must show „0“ bar. If not shut down
and the stainless steel pressure gauge con-
tinuously shows full pressure, this could be
due to leakage at the high-pressure pump,
at the pressure switch, at the high-pressure
hose or at the trigger gun with safety catch.
In case of a leakage there is no guarantee for possible
consequential damages.
Problem
After closing the safety trigger gun the high-pressure cleaner
keeps switching on and o.
The stainless steel pressure gauge continuously displays full pressure.
Possible cause No. 1
Leckage.
Proceeding:
Check connections from the high-pressure
cleaner to the high-pressure hose and from
the high-pressure hose to the safety trigger
gun and also the connection between lance
and safety trigger gun for tightness.
Switch o the high-pressure cleaner. Short-
ly press the trigger of the safety trigger
gun to decrease the high-pressure cleaner.
Unscrew high-pressure hose, safety trigger
gun and lance and check the O-rings. If
the O-rings are damaged they have to be
replaced.
Proceeding:
Switch o the high-pressure cleaner and
pull plug from socket. Stop water supply.
Unscrew pump outlet.
There is no guarantee if the high-pressure pump is damaged by
defective O-rings due to air induction or lack of water (cavitation).
Remove check body and check O-Ring for
soiling or damage. Also check seal seat in-
side pump housing for soiling or damage.
If sealing rings are defective replace
O-rings at once.
Problem
After closing the safety trigger gun the high-pressure cleaner
keeps switching on and o.
The stainless steel pressure gauge continuously displays full pressure.
Possible cause No. 2
The non-return valve is defective.
20


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