12k Single Hydraulic Trailer Jack Leg Kit "Weld On" or "Bolt On"

Primary Mover 12K Hydraulic Trailer Jack Kit

Experience unmatched towing convenience and performance with the Primary Mover Hydraulic Trailer Jack. Built for strength, reliability, and ease of use, this high-performance jack eliminates manual effort while delivering rock-solid stability and durability—even under the most demanding conditions.

Key Features

12,000-Pound Lifting Capability
Effortlessly lift up to 12,000 pounds, making it the ultimate solution for heavy-duty trailers and demanding towing applications.

Dual Counterbalance Valves
Integrated into the hydraulic system, these valves act as a hydraulic lock—holding the jack in place without drift during transit or loading.

Primary Mover Double-Acting Hydraulic Power Unit
Each kit includes our reliable Primary Mover power unit, delivering smooth lifting and controlled lowering at the touch of a button. Designed for performance, durability, and consistent power with a 2-button remote pendant.

15-Foot Remote Pendant
Stay in control from a safe, convenient distance with a 15-foot power-up/power-down remote.

Zinc-Plated Inner Sleeve and Foot
Corrosion-resistant zinc coating protects against weather, road grime, and salt for longer service life.

Heavy-Duty Build with Grade 8 Hardware
Includes premium Grade 8 hardware and reinforced jack structure, built for long-term strength and reliability.

Flexible Hose Length Options
Kits ship with two 72" hydraulic hoses fitted with #6 JIC ends (straight and 90°).
🔄 Need extra reach? Upgrade to two 120" hoses for extended installations (available at additional cost).

Bolt-On or Weld-On Mounting Options
Choose between bolt-on or weld-on installation styles to best fit your trailer setup.
🔧 For bolt-on applications, check dimensions in the product images and technical documentation to ensure compatibility.

Specifications

• Lifting Capacity: 12,000 lbs.

• Hydraulic System: Double-Acting with Primary Mover Power Unit

• Relief Settings: Approx. 3200 PSI (extend), 1500 PSI (retract)

• Hydraulic Hoses: (2) 72" standard length with #6 JIC Straight & 90° fittings (120" optional)

• Fittings: (2) #6 JIC x #6 SAE 90° and (2) #6 SAE Male x #6 JIC Male

• Battery Cables: (2) 4-gauge cables with rubber battery strap

• Remote: 15-Foot Pendant (Power-Up / Power-Down)

• Max Jack Height: 8" from trailer frame to bottom of jack foot

• Fluid Type: ATF (Non-Synthetic Automatic Transmission Fluid)

• Jack Body: 4” square tube, painted finish

• Mounting Style: Bolt-On or Weld-On

Why Choose Primary Mover?

• Same-Day Fulfillment: We ship from our own warehouse—no dropshipping delays.

• Expert Support: Call or message us for fast, knowledgeable help.

• Built to Last: From load-holding valves to stainless fittings and Grade 8 hardware, our jacks are built for real-world conditions.

Upgrade your trailer with the confidence and convenience of the Primary Mover Hydraulic Trailer Jack Kit—where strength meets simplicity.

Download: Hydraulic Trailer Jack Manual