Overflow - Kärcher HDS 9/50 De Tr1 Service Manual

9.15 Overflow

Exemplary illustration. The overflow valves for the 4
pumps are similarly designed, they differ in the spring force
relative to the pressure range.
The overflow valves are permanently set and sealed.
A High-pressure inlet
B High-pressure outlet
C Low pressure return
D Connection of frost protection valve
64
English 5.906-736.0 Rev. 00 (07/15)
1 Spring
2 Control piston
3 Spring
4 Valve bolt
5 Valve
Function
If the pressure on the high pressure outlet increases, the
control piston (2) is lifted up with the valve bolt (4) and the
excess pressure escapes to the suction side of the high
pressure pump.
ATTENTION
Risk of property damage! If water or moisture should leak
from the component, it must be replaced entirely.
Replacing the O-rings only does not provide a remedy in
the long run.