HDR100 Piston Sub Assy (Seal = 65sh) The HDR100 Piston Sub Assy is a replacement piston sub assembly designed for use within HDR100 equipment, helping maintain smooth movement, sealing performance and dependable operation. Supplied with a 65sh seal, this component is suited to repairs where the piston assembly needs replacing due to wear, damage or reduced performance. In dairy and farm equipment, piston assemblies can be exposed to regular pressure, movement and demanding working conditions. Over time, seals and moving parts may begin to wear, which can affect efficiency, response or reliability. Replacing the worn component with the HDR100 Piston Sub Assy helps restore correct function and supports smoother day-to-day operation. This part is useful for engineers, service teams and farms carrying out planned maintenance or urgent repairs. Having the correct piston sub assembly available can reduce downtime, make servicing more efficient and help keep essential equipment working as expected. The 65sh seal provides the required sealing support within the assembly, helping maintain reliable performance once fitted. The HDR100 Piston Sub Assy is a practical spare for keeping equipment