Replace The Suction Valves - Kärcher HDS 9/50 De Tr1 Service Manual

11.9.8 Replace the suction valves.

 Switch off the operating mode switch and secure it
against restart.
 Shut off water supply.
 Take the pressure off the high pressure system by
opening the gun. Check the pressure ratio of the high
pressure system on the pump manometer.
 Remove the valve from the pump seat.
Components in the disassembled condition
1 Piston with tappet
2 Spring
3 Valve casing
4 Diaphragm
 Open the lockscrews of the 3 suction valves and re-
place the O-rings.
English 5.906-736.0 Rev. 00 (07/15)
119