2) 2) SEAL KITS AND COMPONENT GROUPS SEAL KITS AND COMPONENT GROUPS Observe the following notices when carrying out repair work at hydraulic aggregates. (1) Close all por ts of the hydraulic aggregates. (2) Replace all seals. Use only original hydromatik spare parts. (3) Check all seal and sliding surfaces for wear. Rework of sealing area f.ex. with abrasive paper can damage surface. 7-34