A Success and a Dilemma (H-frame press) (Need help)

J. Keeton

J. Keeton

Joined
Nov 15, 2005
Messages
1,209
I'll give the success part first.:) Today I fixed the rocking problem I was having with my ram by sloting some 1/2 plate and welding them onto the sides to provide a wide surface to slide on.





Now for the dilemma, :mad: While I was welding on the plate my welding rod stuck and I gave it a tug. In doing this it accidentally struck and arc onto the shaft on my hydraulic cylinder.







What I was thinking of doing was bringing it up as high as I can get it before it goes into the cylinder, then welding stops on both ends of the ram so that it won't be able to go in and screw up the seals. However, I don't know exactly how hydraulic cylinders work because I have never used one.

So I guess my question is when I want to bring the ram up do I have to push the leaver up or will it automatically go up after I press something? If it automatically goes up does it come up pressing 25tons? I ask this because if I am going to weld stops on it I don't want it to be pressing on them with 25+ tons. I am pretty sure it doesn’t come up with all that pressure but I am not positive.

Should I attempt to fix the problem like this or just buy a new cylinder?

Please help:confused: :confused:

Thanks,
 
I would not weld anything on the shaft. It pulls with as much force as it pushs with. I would polish off (by hand) the damage you did, then just use it. You may not have a problem but if it leaks too bad, then replace it.
 
I was not going to weld onto the shaft. I was going to weld the stops onto the sides of the press. I may of mis-worded it.
 
Also if you have a burned out low spot or pits, you can fill in with JB weld and polish down. This should keep it from leaking.
 
J. Keeton said:
I was not going to weld onto the shaft. I was going to weld the stops onto the sides of the press. I may of mis-worded it.
Click to expand...

OK, I got ya, that would work also but I think I would fix the shaft as stated above.

As for the operation, you have to move a lever to go back up.
 
You can prolly make some kind of a "stop-switch" - so that the switch cuts off whatever (motor) _before_ the affected spot goes past the seal. The down-movement switch would override that so the cylinder can travel downwards. something like that.

Jimmy - it is a bummer, but dont let it get you down :) A nice addition to the collection of freakish things-gone-wrong.
 
sunfishman said:
Also if you have a burned out low spot or pits, you can fill in with JB weld and polish down. This should keep it from leaking.
Click to expand...

That sounds like an awsome idea to me. I think I will probably try that. Thanks!

rashid11 said:
Jimmy - it is a bummer, but dont let it get you down :) A nice addition to the collection of freakish things-gone-wrong.
Click to expand...

Your right on it being a bummer. Just when it happend I relized I should of taped it off. :jerkit:
 
Hello sorry for the trouble with the welding rod .things happen, some we get away with some we don’t . what i will tell you you might not want to hear .
I would see if it’s a rebuild able unit if so order the shaft and rebuild it .
if not consider getting a new one ,no need to worry if it will go at any moment .
The reason the shaft is so slick is to keep the seals from leaking and to keep it clean to stop material out of the cylinder .both are important
as for the controller it`s a center stop up or down .
and the same pressure is on both ways so be very sure to what you use as a stop ,I would get a new cylinder. be sure that is protected at all times I never extend the ram till its all worked out and it getting put together ,hope this helps be safe .
Bowie
let us know
 
I think I am going to try the JB weld fix then if it dosn't work I'll just buy a new one.
 
It doesn't LOOK that bad from the photo, I've used a lot of equipment with pretty rusty shafts worse than that. If it's pretty deep but not that big of a pit I'd probably just polish with emry cloth and use as is. You'll have a little oil leakage, but nothing major. If it's fairly big low spot I'd fill with JB and use as is. You can always get a new shaft and seals later if need be.
 
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