HDR100 Piston Seal Only (65sh Hytrel) The HDR100 Piston Seal Only is a replacement seal for HDR100 piston assemblies used within automatic cluster remover systems. Made from Hytrel with a 65sh hardness rating, this seal is designed to help maintain the correct sealing performance needed for smooth piston movement and reliable ram operation. Within an ACR ram assembly, the piston seal plays a key role in helping the unit respond consistently during milking. Over time, seals can wear, harden, split or lose their shape due to repeated movement, pressure and regular wash-down conditions. Replacing a worn seal with the HDR100 Piston Seal Only helps restore the correct fit around the piston, supporting dependable movement and reducing the risk of weak, slow or uneven ram action. This part is useful for dairy engineers and farm teams carrying out targeted repairs on HDR100 equipment. It is especially helpful when the main piston assembly remains serviceable, but the seal itself needs replacing to improve performance. Keeping the correct seal in stock can make servicing quicker and help reduce downtime between milkings. The HDR100 Piston Seal Only is a practical spare for maintaining autom
