12k Single Hydraulic Trailer Jack Leg (Dual Double) Kit "Weld On" or "Bolt On"

Primary Mover 12K Hydraulic Trailer Jack Kit (Single Leg – Dump & Jack Combo)

Need a single power unit that operates both your hydraulic jack and dump bed?
The Primary Mover 12K Hydraulic Trailer Jack is purpose-built for trailers that demand power, simplicity, and dual-function control. Designed for strength and performance, this jack lifts up to 12,000 lbs and operates off our Dual Double Power Unit—the same unit that runs your dump and jack functions from one clean system.

Key Features

12,000-Pound Lifting Capacity
Effortlessly lift heavy trailers with one jack leg, built to handle serious loads with confidence.

Dump + Jack with One Pump
Powered by the Primary Mover Dual Double Hydraulic Power Unit, this kit combines dump and jack control in a single system, reducing wiring and pump complexity.

Load-Holding Counterbalance Valve
A built-in load-holding valve keeps the jack firmly in position—no drifting while towing or loading.

4-Button Pendant Remote
Gain complete control with a single 15-foot pendant remote:

• Up/Down for jack

• In/Out for dump
  All at your fingertips, safely operated from a distance.

Zinc-Plated Inner Sleeve and Foot
Delivers long-term durability with corrosion protection against moisture, salt, and road debris.

Heavy-Duty Build
Engineered with Grade 8 hardware and reinforced construction to stand up to real-world demands.

Flexible Hose Length Options

• Comes with two 72" hydraulic hoses (straight and 90° JIC ends)

• Optional Upgrade: Two 120" hoses for longer reach installs (extra cost)

Mounting Options: Bolt-On or Weld-On
Choose the setup that fits your trailer best.
📏 Review dimensions in the product photos and documentation to verify fit for bolt-on installation.

Specifications

• Jack Assembly: 12,000 lb, 4” square painted tube, with hydraulic cylinder and load-holding valve

• Power Unit: Primary Mover Dual Double (approx. 3200 PSI relief on all ports)

• Hydraulic Hoses:

  • (2) 72” standard hoses with #6 JIC straight & 90° fittings

  • Optional: (2) 120” extended hoses

• Fittings:

  • (2) 90° #6 JIC x #6 SAE

  • (4) Straight #6 SAE Male x #6 JIC Male

• Battery Cables: (2) 4-gauge

• Battery Hold: Rubber strap included

• Remote: 15-Foot 4-Button Pendant (Dump + Jack control)

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

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

• Mounting: Bolt-On or Weld-On

Why Choose Primary Mover?

• Dual Functionality: Run your dump and jack from one unit—fewer parts, more power.

• Fast Shipping: No dropshipping delays—ships from our own inventory.

• Built for the Real World: Grade 8 hardware, zinc protection, and proven hydraulic performance.

• Knowledgeable Support: Reach out to our expert team anytime for help or install guidance.

Upgrade your trailer the smart way—with the Primary Mover 12K Hydraulic Jack Kit and Dual Double pump combo. Maximum performance, minimum hassle.

Download: Hydraulic Trailer Jack Manual