Replacement Pump Piston fits Harbor Freight-Costco-Arcan-Matco 3 & 3 1/4 t. jack

Replacement Pump Piston for Harbor Freight, Costco, Arcan, Matco Jacks

The Replacement Pump Piston is a service part that restores lifting function in 3 and 3 1/4 ton hydraulic floor jacks.

Overview

This replacement pump piston is built to restore the hydraulic action of a floor jack that no longer lifts or holds pressure. The pump piston fits 3 and 3 1/4 ton jacks and works as a service component for several common jack brands. It suits DIYers and shop techs repairing a jack instead of buying a new one.

Built For Performance

• Designed for 3 and 3 1/4 ton hydraulic floor jacks
• Restores pump action when the original piston is worn or scored
• Steel construction handles repeated hydraulic cycles
• Direct replacement for the pump piston in compatible jack models
• Helps bring a non-lifting jack back into service

Fits These Machines

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

On-The-Job Use

• Repairing a floor jack that will not raise a load
• Rebuilding hydraulic jack pumps in home garages
• Servicing shop jacks to avoid replacement cost
• Maintaining jack performance for regular vehicle lifting

Specs At A Glance

Good To Know

Q: Will this piston fit my specific jack model? A: Confirm the jack capacity and brand match the 3 or 3 1/4 ton listings before ordering. A: Fit can vary by model and production year.

Q: Do I need other parts to complete the repair? A: A pump piston repair often works best alongside fresh seals and hydraulic fluid. A: Inspect the cylinder bore for wear before reassembly.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.