7-piston hydraulic pump with 2 pulleys for LHS. Hydraulic pump with new piston housing (!), new seals and new bearing. ATTENTION: Please clean the entire hydraulic system before installing an overhauled hydraulic unit! Our cleaning fluid (art. no. 308934) is recommended for this purpose. In particular also clean the storage tank in which the dirt of the last 45 years has been deposited. After installing the hydraulic pump, first fill it with LHS via the suction hose. If the above advice is not followed, a warranty claim can be rejected!