Manually moving a new cylinder stroke

scottrh · Oct 5, 2011

I have new 2X4X1.25 DA cylinder[1] and need to open the stroke 1/2 way to get measurements. Should I be able to just remove the hose caps and somehow force the stroke to move outward? It is difficult pulling on it in my vice. Any suggestions are appreciated. Scott.

[1] https://www.surpluscenter.com/Item.asp?item=9-6466-04

JCByrd24 · Oct 6, 2011

Yes it should move, but it will take some effort especially if brand new. Put a few drops of oil on the shaft near the seal and try twisting first to break the static friction. That tightness is what keeps the hydraulic oil in at a couple thousand PSI. I usually put a screwdriver through both clevis's, stand on one, and pull on the other.

MtnViewRanch · Oct 6, 2011

If you have an air compressor and a blow nozzle with a rubber tip, you are all set.

Is that the cylinder that you bought?

J_J · Oct 6, 2011

Make sure the ports are open, and put some muscle on the pull.

scottrh · Oct 6, 2011

Ok thanks everyone. i will try my air compressor. I have a good one.
Yes - i have that cylinder and others. Plan on cutting and welding it. Probably over thanksgiving or so. Good fall project.

J_J · Oct 6, 2011

Be careful with that air, because if you add a lot of air pressure, the cyl rod just might let go and extend at a rapid rate, and if you are in the way, OUCH, or OH Crap.

MtnViewRanch · Oct 6, 2011

J_J said:
Be careful with that air, because if you add a lot of air pressure, the cyl rod just might let go and extend at a rapid rate, and if you are in the way, OUCH, or OH Crap.

I will add that you may want to cover the port at the rod end with a rag. It is common to have some oil left over from assembly and it does like to shoot out all over the place. I do this everyday and forget :ashamed: that it is a new process for others.