Crushed Pipe

[Dynamo^Joe]

My pal got off and rolled his 700 OM hillclimber. Dented the pipes real bad.
This made me think after...
...Years ago I seen an old guy fix a crushed pipe for a Rupp 440.
He welded caps on both ends of the pipe.
On the stinger end of the pipe he welded a nut threaded for a grease nipple.
Without the grease nipple installed he filled the pipe up with water, then capped it with the nipple.
He then took a grease gun and put it on the nipple and got me to pump several times.
"ok grasshopper...start pumpin..."

Well, I pumped almost two grease tubes into the pipe. With each pump the dent came out, I was amazed.
Mind you the pipe still had little wrinkles in it, but boy you would never think it was in a crash and crushed like it was.
After that, he hacksawed the caps off and threw the pipe into his wood stove to melt the grease to be able to pour it out.
...talk about STINKKKKKKK

He learned that trick from an old guy who used to check compressor tanks for pressure.
The old geezer would get a compressor tank, or a hot water tank and fill it up with water...then pump with grease.
Said you can put several hundred pounds pressure no problem to check welds...
Grease guns are good for 10000 psi.

Now Mikey's pipes were bent and actually folded over in one spot. *ugh*...I wonder if this woulda worked.
He still has the pipes, wonder if its worth a try...

[mxzwfo]

Shoot Joe, if the pipes are just laying around, I sure would give it a try....What ya got to loose.
If you can get your hands on one of those air operated guns, it would make it alot easier.


later

[Allen Avram]

Joe: Instead of using grease, use compressed air and heat that part of the pipe that is bent with an acetylene torch until its cherry red and the compressed air will do the rest...hope this helps, Al.

[idooski]

A new twist on hydroforming, eh Grasshopper?

Sounds like it could work quite well to me. But as with any container filled with excessive pressure, excersize extreme caution. That much pressure could take your head off.

We don't want to lay around the cabin all summer headless now , do we?

[Dynamo^Joe]

Umm...I don't believe that a vessel with fluid in it under pressure will explode...
...gas/air yes, but not with a fluid medium full @ 100%.

I have a pal who got an old tank from the dump who did this operation and he found a pinhole in rust scale. The tank made a little "tick" noise and then a tiny stream of water squirted in the air for about a second and then nothing.
Everytime Hank give a pump on the gun, water come out as bout as much as the amount of grease that went into the tank.
Have to remember that pressure is felt at 90 degrees..."all angles" What you are expanding is the amount of grease applied each time you pump. One shot of grease displacing the water that's inside the tank.
The fluid/grease you put inside does not compress.
The only reason there was a lot of pumps is because the tank is flexing...

[machz69]

hmm thats kinda interesting, never thought of it. so you drill a hole. then fill it after? you dont leave it there do you?

[Dynamo^Joe]

Holesaw to cut out rust stuff...then weld patch.

[b349]

interesting, very interesting I have learned so much good stuff on this site it is amazing SWRules

[idooski]

You know, Joey... I believe that you are right about hydraulics not blowing up. At least in your situation. I have, however, in my days as service manager at a Melroe Bobcat dealership, seen a front tilt cylinder that was blown so bad you would have thought that someone put a ball of C4 in it. It looked like a beer can just blown up with an M-80. Someone had used the wrong packing at some point. Then the wrong packing along with a jammed pressure relief valve, resulted in a very scary moment for that skid-steer cowboy.

Just don't want anyone to think it can't happen.

[z24bbx]

Originally posted by b349@Jun 15 2003, 07:43 PM
interesting, very interesting I have learned so much good stuff on this site it is amazing SWRules

i'm with you b349 this is a cool forum