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This is the left, or curb-side, leg for hydraulic trailer jack setups that use side-specific port positioning. The hydraulic connections are arranged differently from the matching right-side leg (e23VV - sold separately), so choosing the correct side helps keep hose routing and installation where your system expects them.
Loaded equipment, livestock, and commercial trailers can put a lot of weight on the tongue. This leg provides 12,000 lbs of lifting capacity and 15,000 lbs of support capacity, letting hydraulic power handle the hard work. Its 24-1/4" lift gives you plenty of movement for hitching, unhitching, and adjusting trailer height.
A hydraulic jack can become frustrating if the trailer slowly settles while it sits. The integrated counter-balance valve helps lock the leg in position after adjustment, reducing hydraulic drift and keeping the trailer at the height you set during storage, loading, or extended parking.
This is a hydraulic jack leg rather than a self-contained system, so it requires a compatible external hydraulic power unit, hoses, and controls. The lower 9/16-18 #6 SAE JIC 37-degree flare port powers extension at up to 3,200 psi, while the upper port powers retraction at up to 1,500 psi. A compatible power unit such as e43VV is sold separately.
The leg does not have its own manual override, so backup operation depends on the hydraulic power unit used with it. If two legs are operated together, a flow divider is strongly recommended to help keep their movement synchronized.
The 10" x 10" footplate spreads the trailer load across a large contact area and pivots as the jack moves, helping it sit more naturally on uneven gravel, dirt, or pavement. The square-tube leg uses two 7-1/2" x 4" mounting tabs for bolt-on installation, while the exterior-grade black finish helps protect the exposed steel from weather and road use.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Steven here with etrailer.com. Folks, today we're looking at a hydraulic jack with integrated counterbalance valve. This is the left leg square two bolt-on, rated at 12,000 pounds capacity. Now folks, the hydraulic left or curbside jack leg works with your existing hydraulic setup. A hydraulic pump and power unit and a right/streetside leg would need to be used to complete a full kit, and those parts are sold separately.
If you don't have them, you can get them here at etrailer.com. Now, this works with units offering up to 3,200 PSI extension and 1500 PSI retraction pressures. Now, it has what's called an integrated counterbalance valve that's gonna eliminate dirt drift and or it's gonna eliminate drift and retraction. Now, it is great for seasonal trailers. It gives you a smooth and effortless operation even for super heavy loads.
Now, it has a large pivoting foot plate on the base as well. I've actually got that blocked up so it can't tilt just for my safety 'cause it's a very heavy jack. This can tilt this way and that way whenever it's facing the way I've got it now, I'm gonna leave them in there just for my safety again, since it's not held up. But it can tilt on the base, and that is a 10 inch by 10 inch square foot plate. It's a simple, easy bolt-on application.
As you can see, you got a bracket here and one on the bottom. Some quick dimensions of this bracket, right at seven and a half by four inches tall on the bracket. The jack itself is right about four and a half by four and a half inch square tube. And an overall height from the base of the jack up to the top when it's fully retracted, it's 34 and 7/8 inches tall. And if you fully extend it to its height, it can go up to 59 inches fully extended from the top to the base.
It has a lift capacity of 12,000 pounds and a support capacity of 15,000 pounds. So folks, this is the hydraulic jack with integrated counterbalance valve. Again, the left leg square two bolt-on rated 12,000 pounds. I'm Steven. Thanks for watching. And as always, stay safe while you're towing.
Customer Satisfaction Score:
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Ratings & Reviews
Mike L.
1/5/2026
I'll get that taken care of for you.
Victoria H.
3/14/2025
That's awesome Eric! We're so happy to be your go-to and appreciate your business!
Victoria H.
3/14/2025
Gwendolyn Y.
10/14/2024
Hey Walter. Sounds like a let down for sure. I do see that one of our customer service reps got a replacement out to ya. If you have any issues at all with the replacement, let me know and I can take care of it for you.
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Mike L.
12/11/2025
Thank you, we're glad we could help!!