Replacement Pump Piston for Harbor Freight Costco Arcan Matco 3 & 3 1/4 t Jack

Product Overview

This aftermarket replacement hydraulic jack pump piston is suitable for replacing the corresponding component in Harbor Freight, Costco, Arcan, and Matco 3 ton and 3 1/4 ton floor jacks. A pump piston moves hydraulic fluid within the pump bore to build the pressure that raises the jack. It is supplied as a replacement piston for servicing the jack hydraulic pump assembly.

Key Features & Performance

• The piston works inside the pump bore to help pressurize hydraulic fluid during jack operation.
• Responds to the pump action so the jack can lift and hold under load through the hydraulic system.
• Suited to replacing a worn, scored, or leaking piston in the pump assembly of the listed 3 ton and 3 1/4 ton jacks.
• Offers a service alternative when the pump piston no longer holds pressure or moves fluid correctly.

Fitment & Compatibility

• for Harbor Freight 3 ton and 3 1/4 ton floor jacks
• for Costco 3 ton and 3 1/4 ton floor jacks
• for Arcan 3 ton and 3 1/4 ton floor jacks
• for Matco 3 ton and 3 1/4 ton floor jacks

Common Uses

• Replacing a damaged or worn pump piston in the hydraulic pump assembly of the listed jacks.
• Servicing a jack that no longer builds or holds hydraulic pressure correctly.
• Restoring pump function after the original piston has failed.

Technical Specifications

• Product Type: Hydraulic Jack Pump Piston
• Model Application(s): Harbor Freight, Costco, Arcan, and Matco 3 ton and 3 1/4 ton floor jacks
• General Application: Replacement pump piston for the listed jack sizes

Frequently Asked Questions

Q: What does a hydraulic jack pump piston do? A: It moves inside the pump bore to pressurize hydraulic fluid, which allows the jack to lift and hold a load.

Q: How do I confirm this piston fits my jack? A: Check the complete jack brand, tonnage, and existing pump piston part number against this listing before ordering.

Closing Notice

This is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.