Kärcher HDS 9/50 De Tr1 Service Manual page 129

 Dismantle both flange bearings on the pump casing; in
order to do so, the 4 screws on the flange must be loos-
ened respectively. At the end, you can pull out the
flange bearings. Tightening torque 20 Nm.
129
English 5.906-736.0 Rev. 00 (07/15)