Product Description
Graco 117449 - Piston U-Cup Seal; A25/EXP2, R3 EXP2 Pump Parts
Piston seals help ensure that pressurized hydraulic fluid does not move past the piston as it moves up and down the cylinder during a pressure cycle. Hydraulic cylinder piston seals are installed in a groove around the piston. Maintaining a tight seal ensures that the cylinder maintains pressure. Weakened or leaking seals cause pressure in the seal to drop, reducing or eliminating the ability of the cylinder to support a load.
