Customer Reviews for VEVOR Single Acting Hydraulic Pump 12V DC Hydraulic Power Unit 3.75 Gallon Dump Trailer Pump Steel Hydraulic Power Unit (Steel, 15 Quart/Single Acting)

First things first, the listing says that it has an SAE #6 output port. What it means is it has a #6 SAE ORB (O-ring boss) output. The confusing part is that there's a #6 ORB male to some sort of female adapter installed in the unit when you get it. Here's what you need to do. Determine what your hydraulic cylinder receives. If you're replacing an old pump, just determine what fitting size the hose you have is. Search online for a combination of adapters/hoses that will let your current hydraulic piston connect to #6 SAE ORB. Also, know that the threads on the unit aren't exactly correct for #6 SAE ORB. It's a tight fit. Don't force it, work it back and forth.If you're building a system from scratch, you'll note that there are two ports on your hydraulic cylinder, and only one on the pump. That's okay. You need to order a breather for the port at the working end of the cylinder (where the shaft comes out of). Just figure out what thread that port is and look for a breather that fits that thread. The reason is that in a single action hydraulic circuit, we rely on gravity to retract the piston. Since we don't want the piston to get full of grit and ruin the seal, we install a breather on the port nearest the extending shaft.Some people have posted comments saying that the implement raises just fine, but falls at free fall. That's down to one of two things. If you only raise the dump bed (or whatever thing) a little bit, you've got a hydraulic piston under the greatest amount of force that it encounters. If you raise it six inches and then lower it, it'll slam down. The piston does most of the work at the beginning for the process and at the end. Also, since this pump is single acting, it relies on bubbles in the hydraulic fluid to prime the cylinder. Each time you raise and lower the implement, more air is driven out in the form of bubbles. So the first time you raise the bed (or whatever) it's got a lot of air in it and will lower quite a lot faster. Just extend and release, extend and release a bunch of times.Also there's no wiring diagram, so just look online for KTI hydraulics wiring, because this unit is a cheap copy of theirs. In fact, KTI has all sorts of drawings that you can use for this company's units. The question is, is this one half the cost because hydraulic pumps are very cheap to make, or because a hydraulic pump that lasts for one year is cheap to make. Time will tell.

Was the wrong unit for my application no problems with the return

Installed with ease, had to change one hydraulic fitting, fill the tank with oil and worked like a champ!

The pumps came in like they said on time. These pumps I use on my large dump trailers they are dependable and last a long time with no major mechanical skills to install.

Your browser does not support HTML5 video. Arrived packaged well with no shipping damage. Simple install. Battery positive connects to the large solenoid post (see photo, red cable), battery negative connects to the large post on the backend of the motor (see photo, black cable). The fitting adapter that came with replaces the installed fitting, it fits into the pump outlet and accepts a -6 JIC Female swivel. The pressure relief valve on this one ( the pressure setting screw is the lower one) was fully out and required loosening the lock nut and a metric Allen wrench to turn it in, I needed to turn it completely in to the stop to achieve full pressure and then tightened the lock nut and reinstalled the cap nut for the adjustment screw. The upper screw is for setting the flow allowed when the lowering solenoid is active (this is used to adjust how fast the hydraulic fluid is allowed to return to the reservoir and requires the same metric Allen wrench, turning it in slows the flow). The switch pendant work fine, I will be installing a weather proof connector ito the side of the box to allow easier access with the box closed and locked. So far I have loaded the dump bed with 5 large loads in excess of 8000 lbs and the pump unit had me issues supplying enough flow and pressure to lift it quickly and smoothly. My system has a 3.25 inch cylinder (see the video). At max pressure had no leaks or seepage at the pump unit. I did add a fitting to the tank to accept a 3/8 inch rubber line from the dead end of the cylinder but a simple breather/filter would also work just fine.

Product was not damaged. I used it for my dump truck. I would recommend this to anyone who is in the market for a hydraulic Pump.

Works great. Would suggest to add metric to standard fittings included. Would make easy adaption to all liftgates

Easy to install ! I put it on a dump trailer and it works great .