Kärcher HD 1050 B, Service Handbook

Page: 15 / 27

HD 1050 Trouble shooting
15
Caution: It is important for O-rings and support
rings to be greased with silicon grease before
mounting and that they be inserted correctly.
Press the valve into the cylinder head, screw in
the valve screw and tighten with a torque of
65 Nm.
3.3 Checking the relief valve
Unscrew the locknut and adjusting nut and pull
off the washer and springs from the rod.
Unscrew the screw plug.
Pull out the rod and piston complete. Check the
piston pin for wear. If it should show signs of
wear, it is essential to replace the piston.
To replace the piston, grip the rod in a vice, heat
the female-thread end and unscrew the piston
with an open-ended wrench.