English
5.906-441.0 Rev. 01 (06/10)
23
Î
Turn off the appliance switch and secure against restart.
Î
Shut off water supply.
Î
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.
Î
Open the lockscrews of the 3 suction valves and replace the O-
rings.
Î
Pull out the suction valves using special pliers (4.901-602.0). If
the valve seat gets stuck in the pump head, you can pull it out
using the drawing tool (6.815-013.0).
Suction/pressure valve setup
Î
Press in the new suction valves (lubricate the O-rings with sili-
con grease).
4.9
Seal high pressure pump
4.9.1
Replace the pressure and suction valves
4.9.2
Replace the suction valves.
