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...

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

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.

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?

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...

:D

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

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

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

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.

Originally posted by b349@Jun 15 2003, 07:43 PM
:devil: interesting, very interesting :devil: I have learned so much good stuff on this site it is amazing SWRules
i'm with you b349 this is a cool forum

anybody that tries to fill pipe with water and heat with torch. will find that pipe is hard to keep heated until water is same temp. watch out though pressure will increase with heat. the same goes for air. you should have a guage and a valve to release pressure if need be. i have used air before doing this. just don't heat too much or heated area could blow out on ya. BECAREFUL !

Your right, that the water won't compress, as long as there is no air in the system, the "rupture" won't be near as severe as it would be with compressed air.

It can however still be quit dangerous. In my business, we do High Pressure Water Cleaning. Every now and again, a hose will blow. At 10,000psi, it can hurt quite a bit if you get hit with it.

Like Idooski says, just be careful if your doing this kind of operation. Submerge the entire thing in a garbage can full of water, and you will absorb any kind of explosion.

FishHog

Elastic Potential Energy
• The energy stored in an object when it is compressed, stretched or twisted

Kinetic Energy
• kinetic energy is the energy of motion
• the kinetic energy of a mass is equal to the work done on the mass to give it that kinetic energy

I agree with both Idooski and FishHog about the capacity for disaster when the potential energy behind a rupture is high.

For Idooski's situation you have the weight of the tilt cylinder, the mast [if it has a mast], the weight of the combined load and the height of the load off the ground all bearing down onto this tilt cylinder. The cylinder blows and the Potential energy from the weight turns into kinetic energy. The weight of the system creates a path for the fluid to travel

FishHog's example probably has a 230 HP diesel engine running a 4 cylinder piston pump ramming water thru a 1/2 i.d hose with a 1/8 nozzle opening. So if there is a split in the steel braid the water will keep pumping thru the least resistance path and cut a small animal in 1/2.

My example I have a guy putting about 40 lbs force thru a handle on a grease gun to make 10000 psi which displaces a small amount of grease that will fill a teaspoon on one shot...then no more energy.
...could explain the little squirt thru that pinhole in the metal.
Potential energy ain't much, so the kinetic energy ain't much. hee hee...

dont let the terrerists get ahold of this article, it may give them a lead on how to make a new bomb from simple snowmobile parts. :nervous:

I'm impressed DynamoJoe, you seem to know your stuff pretty well.
I love it when smart guys agree with me.

:p