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Thank you for watching the video. It would be much easier to use if there was a dent. Thank you for your advice.

I am active in Japan. You can get it for around $200 on auction sites, but I don't know about overseas.

I think it can also be used as an air cylinder.

it uses oil so its hydraulic

It is safe because the cutting edge is away from your body.

See other answers in this channel. The pump has a lever and he turned it before. You do the reverse. You can attach springs to lower it. This is not a dual-acting hydraulic pump. It is a single-acting pump so you need something to push the rod back down after you release the lever.

I need an hydraulic cylinder for my press project. I was thinking if i could get an 50T bottle jack and make this conversion since i have an old Nike pump. It still works upside-down because all the fluid now comes from the pump right? So no need for the pick up tube modification. Please tell me it's possible :D then of course some sort of a spring return setup.

I'm guessing you reverse the pump. That would mean that its only good for transmitting power in one direction but it can retract.

The most common technique is to have a separate valve that lets the hydraulic fluid flow back into a tank. That doesn’t make it retract, but it lets it get pushed down. I’m pretty sure that most hydraulic pumps aren’t designed to suck fluid back.

Thank you for watching the video. Open the relief valve of the pump to free it. Then push it down by hand. It is used in a mechanism that naturally lowers by the weight of the lifted object.

​@@blueworkclothes7384 what sort of pump is that? Is that available to buy online?

@@blth14 Amazon he pointed it out.

Perdón tengo una pregunta como se llama el mecanismo para subir el piston se que se llama bomba que

Yes. The only reason that these don’t normally work upside down is because the lever pump sucks fluid in from the bottom of the outer cylinder. I saw someone convert one of these to work upside down. They added a long tube so that it sucked in the fluid from the top. So it only worked upside down :) This modification here completely removes the pump, which is the only part that has problems upside down.

@@gf2e I ended up tapping and plugging all holes (except the two needed for fluid transfer between the pump side and the one under the ram rod) with grub screws and red loctite. Doing it this way removed the need for a hand pump and adding an extra tube and was still able to use it upside down with an external air pressured hydraulic pump.

@@BigSidtrous ​​⁠Thanks for explaining what you did. I am thinking of doing that but with a battery powered pump. It’s a long term project, though. The off the shelf battery powered pumps are way too expensive, so I might try making my own by combining a motor and gear pump.

I will support you too. That's a funny video

Thanks for your comment It will be encouraging

Then if the brass cylinder head is successful of it being made perfect then test the head on the engine and run it and see if any improvement In performance

Thank you for watching the video I also made a special handle

Thank you for watching the video.