MANUTEX 3-Ton Dual-Pump Floor Jack Plunger Kit for Pittsburgh-style jacks — dual low-side plungers, cylinders & springs

MANUTEX replacement plunger kit restores full lifting power to 3-ton dual-pump hydraulic floor jacks compatible with Pittsburgh and similar brands.

If your dual-pump 3-ton floor jack is losing lift height or feels spongy, worn low-side pump plungers and cylinders are often the cause. This MANUTEX kit replaces both the larger and smaller low-side plungers plus the matching cylinders, springs, retainers, covers and C-rings to recover hydraulic pressure and reliable operation. The two plunger sets are different sizes — verify dimensions against your jack before installing.

How will these replacement parts restore my jack’s lifting performance?

Worn plungers and cylinders let hydraulic fluid bypass seals or compress air, reducing pressure and travel. Installing both matched plungers and cylinders re-establishes seal contact and consistent fluid displacement so the jack regains its rated capacity and travel.

• Replaces bigger and smaller low-side pump plungers to stop internal leakage.
• New springs and retainers ensure correct pump return and seating.
• Covers and C-rings secure components to reduce contamination and wear.

Which jack models are compatible with this MANUTEX kit?

This kit is designed for 3-ton hydraulic floor jacks that use dual low-side pumps. It fits common makes that use similar dual-plunger arrangements such as Pittsburgh and other widely sold brands with comparable dimensions.

• Compatible with many Pittsburgh-style 3-ton dual-pump jacks.
• Also fits several Harbor Freight, Daytona, Arcan, Torin Big Red-like models if measurements match.
• Check plunger and cylinder sizes included to confirm fit before ordering.

What are the exact dimensions and parts included in the kit?

The package includes two distinct plunger assemblies (larger and smaller low-side) with their mating cylinders and hardware. Each set contains the pump plunger, cylinder, retainer, spring, protective cover and C-ring — note the two sets are not identical in size.

• Bigger low-side pump plunger: approximately 2.88" x 0.86" with seals; cylinder 2.59" x 1.19".
• Smaller low-side pump plunger: approximately 2.85" x 0.59" with seals; cylinder 2.59" x 1.04".
• Package: two complete plunger/cylinder sets plus springs, retainers, covers and C-rings.

How do I check fit and perform a basic installation?

Before you begin, compare the kit dimensions to the existing plungers and cylinders removed from your jack. Typical installation involves disassembling the pump area, swapping the old plungers and cylinders for the new assemblies, and reassembling with the provided retainers and C-rings.

• Confirm measurements of existing parts match kit dimensions to avoid mismatch.
• Drain hydraulic fluid or keep a clean work area to prevent contamination.
• Reassemble carefully and bleed the jack per manufacturer guidance to remove trapped air.

Who this is for: technicians, home mechanics, and shop owners with 3-ton dual-pump hydraulic floor jacks that have lost lift height or feel soft. If you operate Pittsburgh-style or similarly constructed jacks and need an economical repair that replaces both low-side plungers and their cylinders, this MANUTEX kit supplies the matched components and hardware necessary to restore reliable operation — provided you check the dimensions and follow safe installation and bleeding procedures.