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Trailer Jacks

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Hydraulic trailer jacks raise, level, and stabilize trailer tongues and frames using a hydraulic ram instead of a screw mechanism, giving you faster lift under load. The right jack comes down to matching tonnage, lowered height, stroke, and mount to your trailer. If your current jack is discontinued or unmarked, send your specs for a cross-reference.

Bestseller

Item SKU: 6PORT

Stillwell 6?port Ball Valve

7,000 LB Stillwell Hydraulic Trailer Jack for Bumper Pull Trailers | Tradesman Model

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12,000 LB Stillwell Hydraulic Trailer Jack with Power Unit | Atlas Backpack Model

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12,000 LB Stillwell Hydraulic Trailer Jack | Atlas Model

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Stillwell The Cube

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Stillwell Atlas 4 10K Double Acting Hydraulic Trailer Jack with Universal Bracket

Item SKU: SJ001B1DEM4SA

Stillwell Atlas 4 10K Single Acting Hydraulic Trailer Jack with Universal Bracket

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How to Choose a Hydraulic Trailer Jack

Tonnage (capacity) — Rate the jack above the tongue or frame load it will carry, with margin for shifting and dynamic loads; never size to the static weight alone.
Lowered (closed) height — The retracted dimension has to fit the clearance between your frame or mount point and the ground; measure the tightest position before ordering.
Lift (stroke) / extended height — Confirm the ram travel reaches the grade and leveling height you need; account for uneven ground and ramp situations.
Type / actuation — Bottle-style hand-pump, electric, or pneumatic units differ in speed and the power you have on hand; match actuation to whether a battery, air line, or manual operation is available at the trailer.
Mount and footprint — Verify the base or weld/bolt pattern fits your tongue or frame and that the base spreads load on the surface you park on.

Which Jack Is Right for the Job?

Trailer jacks overlap with general-purpose hydraulic jacks, so confirm fit by the numbers above rather than by name. For dead-weight lifting and stabilizing, a hand-operated bottle jack such as the Enerpac GBJ Series Industrial Bottle Jacks or a portable Enerpac JH-Series, Aluminum and Steel Jacks covers most jobs. Where you need powered, repeated, or hands-off lifting, compare the Enerpac PR-Series, Electric Pow'r-Riser Lifting Jacks against the Enerpac PR-Series, Pneumatic Pow'r-Riser Lifting Jacks based on whether shop power or an air supply is available. When in doubt, match tonnage, closed height, and stroke to your trailer and verify the mount before you buy. See the full range under Hydraulic Jacks.

Complete the System

For powered lifting setups, pair a jack or ram with a hydraulic source and supporting components. Browse Hydraulic Pumps for the pressure and flow to drive a cylinder, Hydraulic Cylinders when you build a custom lift, and Hydraulic Power Units for a self-contained electric or gas source on the trailer or in the shop.

Cross-Referencing an Obsolete Hydraulic Trailer Jack

When a trailer jack is discontinued, the part you actually need is an equivalent that matches capacity, closed height, stroke, and mount — not the original model number. We have cross-referenced hydraulic jacks and lift components across manufacturers since 1963, so an obsolete or unmarked unit is usually replaceable once we know the dimensions and load. Send the failed unit's ratings, footprint, and a photo and we will confirm the closest in-stock match: request a cross-reference.

Hydraulic Trailer Jacks – Frequently Asked Questions

How do I measure for the right trailer jack?

Measure the clearance from your mount point or frame to the ground at the lowest position (this sets the maximum lowered height), then measure how high you need to lift to level or unhitch (this sets the required stroke). Match both to the jack, and confirm the tonnage exceeds the load the jack will carry.

What tonnage trailer jack do I need?

Size the jack above the actual tongue or frame load it lifts, with margin for shifting and uneven ground rather than the static weight alone. If you are unsure of the load, send us the trailer details and we will recommend a capacity.

What is the difference between a hand-pump, electric, and pneumatic jack?

Hand-pump bottle jacks need no external power and are simplest for occasional lifting. Electric and pneumatic units lift faster and hands-free, but require a power source: compare the Enerpac PR-Series, Electric Pow'r-Riser Lifting Jacks when shop or battery power is available, and the Enerpac PR-Series, Pneumatic Pow'r-Riser Lifting Jacks when you have an air supply.

Is a bottle jack good for trailer use?

A bottle jack works well for dead-weight lifting and stabilizing where you have ground clearance for its closed height. For that use, look at the Enerpac GBJ Series Industrial Bottle Jacks, and verify the lowered height fits under your frame before ordering.

What can I use a hydraulic trailer jack with?

For powered or custom lift setups, pair a jack or ram with a source and supporting parts: Hydraulic Pumps, Hydraulic Cylinders, and self-contained Hydraulic Power Units.

Do you stock other hydraulic jacks besides trailer jacks?

Yes. Trailer jacks sit within a broader range of lifting jacks; browse the full selection of bottle, portable, electric, and pneumatic units under Hydraulic Jacks.

Do these ship same day?

In-stock trailer jacks generally ship the same day from our Great Falls, MT warehouse when ordered before the daily cutoff. Check the product page for current stock status, or contact us to confirm a ship date.

My trailer jack is discontinued — can you find a replacement?

Usually, yes. We cross-reference obsolete and unmarked jacks by capacity, lowered height, stroke, and mount rather than by model number. Send the old unit's ratings, footprint, and a photo to request a quote.

Trailer Jacks

Stillwell 6?port Ball Valve

7,000 LB Stillwell Hydraulic Trailer Jack for Bumper Pull Trailers | Tradesman Model

12,000 LB Stillwell Hydraulic Trailer Jack with Power Unit | Atlas Backpack Model

12,000 LB Stillwell Hydraulic Trailer Jack | Atlas Model

Stillwell The Cube

Stillwell Atlas 4 10K Double Acting Hydraulic Trailer Jack with Universal Bracket

Stillwell Atlas 4 10K Single Acting Hydraulic Trailer Jack with Universal Bracket

Stillwell 39″ Dump Trailer Conversion Kit for Single Acting Trailer Jack

Stillwell 48″ Dump Trailer Conversion Kit for Single Acting Trailer Jack

Stillwell 60″ Dump Trailer Conversion Kit for Single Acting Trailer Jack

Stillwell 48″ Dump Trailer Conversion Kit

Stillwell 60″ Dump Trailer Conversion Kit

Stillwell Flow Divider/Combiner

Stillwell 39″ Dump Trailer Conversion Kit

Stillwell Atlas 4 10K Vaquero with Universal Bracket, Self-Contained

How to Choose a Hydraulic Trailer Jack

Which Jack Is Right for the Job?

Complete the System

Cross-Referencing an Obsolete Hydraulic Trailer Jack

Hydraulic Trailer Jacks – Frequently Asked Questions

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