YNF17564 Piston HMS072 Hydraulic Pump Piston for Excavator Main Pump Rotating Group

The YNF17564 piston, manufactured for the HMS072 hydraulic pump, is a key component within the pump’s rotating group, responsible for converting hydraulic pressure into mechanical motion. Its performance directly impacts the pump’s pressure stability, flow efficiency, and overall hydraulic response. When pistons become worn, scratched, or fatigued, the pump may experience pressure loss, overheating, noise, reduced system power, and increased internal leakage.

Constructed from heat-treated alloy steel and processed with precision CNC machining, the YNF17564 piston offers excellent surface finish, high hardness, and precise dimensions. These features ensure smooth movement within the cylinder block, reduce friction, and maintain proper sealing—even during long-hour heavy-duty operation in harsh environments.

Widely used in hydraulic pump rebuild centers, excavator maintenance workshops, and aftermarket parts distribution, this piston is essential for restoring pump efficiency and extending machinery lifespan.