5 440-898. Hydraulic pump with new piston housing made of steel (!), new seals and new bearing. Painted green; pulley 106mm. \ BE CAREFUL: \ Please clean the entire hydraulic system before installing an overhauled hydraulic unit! Our cleaning fluid (art. no. 308910) is recommended for this purpose. In particular also clean the reservoir tank in which the dirt of the last 45 years has been deposited. \ After installing the hydraulic pump, first fill it with LHM via the suction hose. \ If the above advice is not followed, a warranty claim can be rejected! \ In replacement.