The GRACO 181959 SEAL, PISTON is a cast iron piston seal designed for use in GRACO air-powered pumps. It is intended to provide a reliable seal within the pump assembly, ensuring efficient fluid transfer and preventing bypassing during operation.

Key Features:

• Piston Seal
• 0.6250 in Bore, 3.1500 in OD
• Cast Iron
• Designed for GRACO air-powered pumps (specific models not listed)
• Finished with keyway for secure fit
• Durable cast iron construction for longevity
• Designed for reliable sealing and reduced bypassing

Applications:
Used in GRACO air-powered pump assemblies for fluid transfer applications, such as lubrication, spray equipment, and industrial maintenance.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with GRACO equipment.
• Inspect the piston seal and surrounding components for wear or damage before installation.
• Clean all parts thoroughly before assembly.
• Lubricate o-rings and mating surfaces as recommended in the equipment manual.
• Follow torque specifications for reassembly to ensure proper sealing and function.
• Regularly inspect piston seals for wear or damage.
• Replace seals if bypassing or fast cycling is observed.
• Refer to the equipment manual for detailed maintenance procedures.