BuleVina 3-Ton Dual-Pump Floor Jack Replacement Plunger Kit — Low-Side Small & Large Plungers with Seals

BuleVina 3-ton dual-pump low-side pump piston plunger kit replaces both larger and smaller plungers to stop leaks and restore lifting performance on compatible floor jacks.

If your hydraulic floor jack has developed a soft lift, slow rise, or fluid seepage on the low side, worn pump pistons and seals are a common cause. This BuleVina replacement kit includes both the smaller and larger low-side plungers, cylinders, springs, retainers, C-rings and two rubber sealing rings per plunger so you can rebuild the horizontal double pump assembly and return the jack to reliable service.

How will this kit fix a leaking or weak floor jack?

The kit replaces the worn internal parts that normally allow oil to bypass or lose pressure in the pump section of a dual-pump jack. With fresh plungers, new seals and a properly fitted cylinder, the pump can reestablish the correct pressure and improve lift speed and load-holding. Installation restores tighter clearances and reduces internal leakage without needing a full jack replacement.

• Includes both small and large low-side plungers plus matching cylinders and springs
• New rubber sealing rings on each plunger prevent hydraulic oil seepage
• Replaces the common wear points inside a horizontal double pump

Which floor jacks are compatible with this plunger kit?

This plunger and piston kit is designed for 3-ton hydraulic floor jacks with a horizontal dual-pump layout. It’s especially suited for widely used brands and models that share the same low-side pump architecture, making it a practical replacement part for many shop and home jacks. Always compare dimensions before ordering to confirm fit.

• Fits most 3-ton dual-pump floor jacks (horizontal double pump)
• Compatible with Torin Big Red, Harbor Freight models, Daytona, Pittsburgh and Arcan-style jacks
• Measure plunger and cylinder sizes against product listing dimensions to ensure match

What are the key measurements and parts included?

The kit supplies two complete low-side pump sets: one sized smaller and one larger to match the typical dual-plunger arrangement. Each plunger comes with two rubber sealing rings, and the cylinder, spring, C-ring and retainer are matched to that plunger. Exact dimensions are provided so you can verify the replacement will seat correctly in your jack.

• Low-side smaller plunger: 2.88" length x 0.59" diameter (with seals); cylinder 2.64" x 1.06"
• Low-side bigger plunger: 2.88" length x 0.86" diameter (with seals); cylinder 2.59" x 1.19"
• Package includes 2 complete sets for horizontal double pump, springs, C-rings and retainers

How difficult is installation and what should I prepare?

Installation requires basic mechanical skill and common hand tools. You’ll need to safely support the jack, drain or contain hydraulic fluid if necessary, remove the pump access components, and replace the old plunger assemblies with the new components. Follow manufacturer service guidance or consult a repair manual if you’re unsure.

• Basic tools: pliers, snap-ring pliers, wrenches and rags for fluid control
• Work on a clean, level surface and observe hydraulic fluid safety and disposal rules
• Replacing both plungers at once helps rebalance the pump and prolong service life

Who this is for: This BuleVina pump piston plunger kit is aimed at DIY mechanics, small shops and maintenance crews who want to restore a 3-ton dual-pump floor jack without buying a new unit. It’s best for users who can perform straightforward disassembly and reassembly, have measured their existing plungers to check compatibility, and want a cost-effective way to stop leaks, recover lifting power and extend the jack’s usable life.