Bonvoisin 20T Hydraulic Ram Cylinder Jack Low Profile Porta Power Ram 0.55" Stroke Single-acting Mini Jack Ram with CP-180 Hydraulic Hand Pump for Machinery Shipbuilding

I used this unit (CP-180 & 20 ton ram) to jack my house off the foundation to replace the sill plates. It worked perfect for this application. If your choosing between this unit and the one at harbor freight, get this one as the harbor freight version doesn't have near the same build quality (bought both and had them side by side). A few things to keep in mind: 1) Buy some AM46 hydraulic fluid at the same time (this is 15wt oil they suggest). You WILL need to add fluid to the unit once you cycle it a few times to purge the air. 2) It takes several pumps for the fluid to travel to the ram at each use. 3) If you make the mistake like I did and removed the allen screw near the valve (the valve that you use to release pressure), the 3rd pic is how the springs and ball bearings install. Overall, happy with the purchase and the customer service is surprisingly very responsive.

I bought this pump and jack to straighten part of the frame on my tractor. It worked the first time I tried it but 5 minutes later would not pump. I sent 2 emails in two days to the company to get some advice and after the 3rd day with no answer decided to return both the pump and jack.The one time it worked it was a good piece of equipment but without customer support it was useless to me.Customer Service reached out to me to make everything ok so I have changed my review to 5 stars Great customer service!

It was out of fluid when I got it and when I filled it up, it wouldn’t push the ram for either block I also purchased, I didn’t get to try it till a few weeks after I received it.They read my previous review and offered to make it right, it was a bad tool so they replaced it with no problems. Thank you

This is my 3rd pump and after using it once it quits pumping. No fluid loss just quits working. Tried to bleed and put a gauge on it and it’s not pumping at all.

Had a problem with my car frame and nothing else could get it the right aoace to shift things the needed inch back into alignment. This worked perfectly.

good tool i had to remove a wheel hub from a axel (tapered shaft) from a tractor a 2010 johndeere used correctly worked like a dreem thank you!!!!!

Looks and feels relatively high quality and heavy duty similar to a more popular name brand version.Worked well for me. And I kept the box it came in for storage.. has a kind of shadow board.

The ram pump cylinder was great and I used it with another larger porta power ram. I didn't use the .55" small porta power ram and don't see many uses for it. Good overall purchase.