Dexter 12K Power Jack – Hydraulic Trailer Jack

Dexter 12K Power Jack – Hydraulic Trailer Jack

The Dexter 12K Power Jack is built to make heavy trailer lifting, leveling, and hookup easier without manual cranking. Designed for use with a compatible hydraulic power unit, this single jack provides strong support, smooth movement, and dependable performance for demanding trailer applications.

This listing includes the hydraulic jack only and is intended for replacing an existing jack leg or building a custom hydraulic trailer jack system with a compatible pump, hoses, fittings, and controls.

What’s Included

• One Dexter 12K hydraulic trailer jack

Key Features

• 12,000 lb Support Capacity: Designed for heavy-duty trailer support applications. This refers to the jack’s static support rating.
• 10,000 lb Lift Capacity: Provides strong hydraulic raising power when used with a compatible hydraulic power unit.
• 20″ Travel Range: Offers a wide operating range for trailer hookup, leveling, and support.
• Large 9-1/2″ x 9-1/2″ Footplate: Helps spread the load and improve stability on gravel, dirt, job sites, and uneven ground.
• Heavy-Duty 4″ x 4″ Outer Tube: Rugged square-tube construction designed for demanding trailer and job site use.
• 3-Year Manufacturer Warranty: Backed by Dexter’s manufacturer warranty for dependable long-term performance.

Designed for Hydraulic Trailer Jack Systems

This Dexter | Premium Supply Power Jack is intended for use with a compatible hydraulic power unit, hoses, fittings, and control system. It can be used as a replacement jack leg for an existing Dexter Power Jack setup or as part of a new hydraulic trailer jack installation.

If you need more than the jack leg, Johnson Trailer Parts also offers complete Dexter 12K Power Jack hydraulic trailer jack kits, 12K add-on kits, 12K kits with chargers, and 24K dual hydraulic trailer jack setups.

Trailer Applications

Dexter | Premium Supply hydraulic Power Jacks are commonly used on heavy-duty trailers where manual crank jacks are slow, difficult, or impractical.

• Dump trailers
• Gooseneck trailers
• Equipment trailers
• Livestock and horse trailers
• Cargo trailers
• Car haulers
• Construction trailers
• Flatbed trailers
• Custom trailer builds and hydraulic trailer upgrades

Fitment Note

Proper frame height is critical for fitment and operation. The vertical distance from the bottom of the jack foot to the underside of the trailer frame should not exceed 8″. Always verify trailer frame height, mounting location, hydraulic system compatibility, hose routing, and installation requirements before ordering.

Specifications

• Brand: Dexter | Premium Supply
• Product Line: Power Jack
• Jack Type: Hydraulic trailer jack
• Configuration: Single jack only
• Support Capacity: 12,000 lb static support capacity
• Lift Capacity: 10,000 lb hydraulic lift capacity
• Travel: 20″
• Retracted Bracket Height: 30-3/4″
• Extended Bracket Height: 50-3/4″
• Footplate Size: 9-1/2″ x 9-1/2″
• Outer Tube Size: 4″ x 4″
• Recommended Hydraulic Flow: Up to 2 GPM
• Maximum Raise / Extend Pressure: 3,200 PSI
• Maximum Lower / Retract Pressure: 1,500 PSI
• Recommended Fluid: Dexron III ATF for normal operating conditions
• Warranty: 3-year manufacturer warranty

Installation Manual

• ⇓ Download Dexter 12K Hydraulic Trailer Jack Manual

Important Notes

• This listing is for the hydraulic trailer jack only.
• A compatible hydraulic power unit, hoses, fittings, controls, and electrical components are required for operation.
• The maximum distance from the bottom of the jack foot to the underside of the trailer frame should not exceed 8″.
• Professional installation is recommended for hydraulic and electrical trailer systems.

Frequently Asked Questions

What hydraulic fluid should I use?

For normal operating conditions, Dexron III ATF is recommended for this hydraulic trailer jack system. In extremely cold operating environments, a synthetic aircraft-rated hydraulic fluid may be required. MIL-H-83283 is commonly recommended for extreme cold applications. Always confirm fluid requirements for your climate and hydraulic setup before servicing the system.

Does this jack self-level the trailer?

No. This jack does not automatically self-level the trailer. It provides hydraulic lifting and lowering, but trailer leveling must still be controlled by the operator.

What is the difference between support capacity and lift capacity?

The 12,000 lb rating refers to the jack’s support capacity, while the 10,000 lb rating refers to hydraulic lifting capacity. In simple terms, support capacity is the static load the jack is designed to support, while lift capacity is the load the hydraulic system is designed to raise.

Is this a complete hydraulic trailer jack kit?

No. This listing includes the single Dexter 12K hydraulic trailer jack only. If you need a complete setup with pump, controls, hoses, and fittings, see the Dexter 12K Power Jack hydraulic trailer jack kit.

Can this jack replace a manual crank trailer jack?

Yes, this jack can be used as part of an upgrade from a manual crank jack, but it must be installed with a compatible hydraulic power unit, hoses, fittings, controls, and electrical components.

What trailers commonly use this jack?

This style of hydraulic jack is commonly used on dump trailers, gooseneck trailers, equipment trailers, livestock trailers, horse trailers, cargo trailers, car haulers, flatbed trailers, and other heavy-duty trailer applications.

Related Dexter Power Jack Options

Need a different hydraulic trailer jack setup? Compare our Dexter 12K single and 24K dual Power Jack options below:

• Dexter 12K Power Jack – Hydraulic Trailer Jack Add-On Kit
• Dexter 12K Power Jack – Hydraulic Trailer Jack Kit with KTI Hydraulic Pump
• Dexter 12K Power Jack – Hydraulic Trailer Jack Kit with KTI Hydraulic Pump and Chargers
• Dexter 12K Power Jack – Hydraulic Trailer Jack Kit with KTI Dual Double-Acting Pump
• Dexter 24K Dual Power Jacks – Hydraulic Trailer Jacks
• Dexter 24K Dual Power Jacks – Hydraulic Trailer Jack Kit with KTI Hydraulic Pump

Why Buy from Johnson Trailer Parts?

Johnson Trailer Parts supplies genuine Dexter | Premium Supply hydraulic trailer jack products for trailer builders, repair shops, farms, contractors, and trailer owners who need dependable hydraulic lifting solutions.

Choosing the wrong jack or mismatched hydraulic setup can create installation problems and added cost. If you are unsure whether you need a jack-only replacement, add-on kit, complete kit, or dual jack setup, contact us before ordering and we can help match the right Dexter Power Jack system to your trailer.

Need help choosing the right hydraulic trailer jack setup? Call Johnson Trailer Parts at (602) 292-9690 for expert fitment support.