Kärcher 570 - Functional Faults

Function fault Karcher 570
Special screw plug
Functional faults
1. Relief valve does not switch to
circulation
Fault
Relief valve does not close
O
- ring set defective
Remove the housing cover
Unscrew the special screw plug.
Using an
8mm socketdriver, pressdownthe
piston and by turning the piston, unscrew it
from the valve spindle. Pull out the piston
with some suitable pliers.
Remove the O
- ring set complete and repla -
ce it with a new set, using the special tool
after applying silicon grease.
Insert the piston in the zylinder head, screw
it to the spindle. Use loctite (No.
6.869 - 002)
to secure it.
Screw in the special screw plug complete
and tighten it with
- a torque of 30 Nm.
2. No detergent is drawn in
Detergent non return valve and O - ring
sticking together. Pull the suction hose from
the hose nipple. Unscrew the hose nipple
using a 19 mm oDen ended wrench.
~auiion: The check ball could fall out.
Remove the
spring, ball and O - ring and
clean them. Replace the O
- ring (without
grease), ball and spring.
Note: The smaller end of the spring has to
face towards the ball.