Overflow Valve, Cross Section Drawing - Kärcher HD 9/50-4 Cage Service Manual

4.8.2 Overflow valve, cross section drawing

Positions 1 through 46 same as with "Overflow, exploded view".
Assembly instructions
First, insert the overflow casing (19), then insert the spring plate,
bottom (16) with spring (12), disc (13) and O-ring kit (14).
A High pressure
B Return (low pressure, suction side)
C High-pressure outlet
Function
If the pressure on the high pressure outlet increases, the control
piston (15) is lifted up with the valve bolt (9) and the excess pres-
sure escapes to the suction side of the high pressure pump.
22
English 5.906-441.0 Rev. 01 (06/10)