The Distributor 86715422 acts as the hydraulic control center of the HC25 Hydraulic Rock Drill, regulating oil flow to coordinate piston impacts and motor rotation. Generic distributors with imprecise  (tolerance ≥±0.005mm) are prone to ，causing erratic drill behavior. This OEM part features (tolerance ±0.001mm) with a corrosion-resistant chrome plating, ensuring smooth operation. Its internal oil channels are deburred and polished to minimize flow resistance, requiring replacement only in cases of severe blockage or leakage.