Hitachi excavator accessory 0825602 hydraulic pump back cover gasket

0825602 is a back cover packing used in Hitachi excavator hydraulic pump systems. It is installed between the hydraulic pump back cover and the pump housing. The main functions are: 1. Effectively seal the high-pressure oil inside the hydraulic pump; 2. Prevent hydraulic oil leakage from the back cover joint surface; 3. Avoid external dust and impurities from entering the pump body; 4. Ensure the normal working pressure and volumetric efficiency of the hydraulic pump; 5. This gasket is a vulnerable sealing component in hydraulic pump maintenance. When the rear cover seal fails, problems such as hydraulic oil leakage, oil stains on the pump body joint surface, and system pressure drop may occur. Common fault manifestations: 1. Oil leakage or dripping at the back cover position of the hydraulic pump. 2. Obvious oil stains on the joint surface of the pump body. 3. Insufficient pressure or slow action of the hydraulic system. 4. Abnormal decrease in oil level