Disassemble The Pump - Kärcher HDS 5/11 U Service Manual

5.11.15Disassemble the pump

Remove the pump head
The pump head screws go through the piston casing
and are screwed into the motor casing.
Therefore, in order to be able to remove the pump
head without having to remove the piston casing, the
piston housing must be fastened to the motor casing
with two installation screws.
There is no thread installed in these bores in the mo-
tor casing by the manufacturer. You have to use
thread cutting screws.

Coat two cutting screws (M5x30) lightly with oil
and turn them through the piston casing into the
motor casing.

Remove the pump head screws.
1 Pump head
2 Cutting screws
3 Motor casing
4 Piston casing
5 Pump head screws

Pull off the pump head.
1 Pump head
 Place the pump kit vertically.
 Unscrew the cutting screws alternatingly step by
step.

Remove the piston casing.
1 Piston casing
2 Cutting screws

Replace the oil and seal ring.
 Check the axial ball bearing of the swash plate.
1 Motor casing
2 Oil fill
3 Swash plate with axial ball bearing
4 Fastening screw, swash plate
5 Washer ring
English 5.906-487.0 Rev. 00 (04/10)
37