PISTON (JLG JL9-170840SJ)

A worn piston can disrupt the conversion of fluid pressure into linear motion, leading to reduced system responsiveness. This aftermarket replacement part references JLG catalog number JL9-170840SJ. The piston functions as a sliding component that transfers force within a cylinder assembly. A common failure consequence is internal leakage past the piston seal, which can cause erratic movement or loss of holding force. In a typical usage context, the piston must maintain a tight seal against the cylinder bore to sustain consistent pressure. The item ships at approximately 9.67 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: JL9-170840SJ, jl9-170840sj, JL9170840SJ, jl9170840sj