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Upgrade your power-up/gravity-down dump trailer from manual cranking with a 10,000-lb Atlas IV jack. Hydraulic pressure extends the jack, compressed air retracts it, and the 39" kit includes the valve, hoses, and fittings.
If you're still cranking a heavy manual jack even though your dump trailer already has hydraulic power, this Atlas IV kit lets you put that system to work at the tongue too. The jack gives you 10,000 lbs of lifting capacity and 26" of lift for easier hitching and unhitching when you're dealing with a heavy work trailer.
This single-acting Atlas is designed to work with a compatible power-up/gravity-down dump trailer hydraulic system. Hydraulic pressure extends the jack to raise the trailer, while compressed air in the jack retracts it. The NeXgen adapter installs in the retract port and gives you a way to add air and maintain the pressure needed for retraction.
Retraction air pressure should be maintained between 80 and 125 psi. Because air pressure can change with temperature, the NeXgen adapter gives you a way to add air as needed to maintain the proper pressure. The compressed-air return also eliminates the conventional return spring found in many single-acting cylinders.
The included 6-port selector valve lets the jack and dump bed share the trailer's existing hydraulic power unit instead of requiring a second pump. The jack itself does not have a built-in manual override, so emergency operation will depend on the capabilities of your trailer's hydraulic power unit.
This kit includes one 39" hose and one 18" hose, along with the selector valve and fittings needed for the hydraulic connections. Before installation, you should compare those hose lengths with the locations of your pump, selector valve, dump cylinder, and jack. Trailer layouts vary, so planning the routing first helps you choose a practical valve location and determine whether the included hoses will reach where you need them.
The universal eight-hole bracket gives you a bolt-on mounting option when the pattern matches your trailer frame. You should check the bracket and bolt-hole dimensions on the jack to make sure it'll work with your trailer. Mounting hardware is not included, so you can choose the bolt length that fits your frame thickness.
Once it's mounted, glide bearings help prevent contact between the inner and outer tubes, while Stillwell's seal design helps improve cycle life and load holding. A zinc-plated swivel foot and powder-coated steel construction add protection for repeated work around a dump trailer.
Alternate Instructions
Ratings & Reviews
Nick S.
12/15/2025
I am sorry to hear you are having trouble getting the Atlas to retract. We will reach out shortly and help troubleshoot through this.
Do you have a question about this Trailer Jack?
Info for this part was:
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Lazer S.
5/5/2026
Sorry about the lack of instructions, Sean. I will see if I can get those added to our site so they are available to everyone. Surprised they weren't included. What did you install this on?