Kärcher HD 1050 Service Handbook page 20

Trouble shooting
20
Remove the housing together with the pistons.
Pass a suitable screwdriver through the leakage
bores and lever out the oil seal rings.
Caution: Take care not to damage the sealing
surface of the housing.
Remove the O-ring.
Clean the housing of grease and oil.
Note: The new oil seal rings should be soaked
in water for some time before they are fitted.
Without applying any grease or oil, fit the oil seal
rings in the housing using the mounting mandril
(special tool).
Coat the O-ring with silicon grease and place it
in the groove in the housing.
Insert the pistons and springs in the housing
Install the housing evenly into place by means
of the mounting screws (special tool), taking
care not to tilt it.
HD 1050