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Need know how to fill dents in Hydr Rods?

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Abe Bunker

10-07-2000 19:26:15




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I need a method of filling small dents in
hydraulic rods. What first came to mind was JB
Weld but wasn't certain adhesion to polished
surfaces would be guaranteed otherwise the stuff could come loose in the cylinder. I could try to braze it but I'm not good when
it comes to preventing distortion. As it is now I carefully filed down the high
spots but need to complete the job otherwise "O"
seals will wear out faster.

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Abe Bunker

10-12-2000 07:51:47




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 Re: Need know how to fill dents in Hydr Rods? in reply to Abe Bunker, 10-07-2000 19:26:15  
Thanks all!.

I think i'll try JB Weld. I'll be biting
my nails though. New cylinders come with the
warning "do not use teflon on threads". I guess
if the weld comes loose i've had it. I'll keep
the board posted.

I'll look that up Steve, thanks.



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T_Bone

10-13-2000 03:30:28




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 Re: Re: Need know how to fill dents in Hydr Rods? in reply to Abe Bunker, 10-12-2000 07:51:47  
Hi Abe, I've have 11 cylinders to rebuild so I'm looking into the Hot process torch. They havn't gotten back to me on the price of the torch yet.
The torch doesn't look like it would cost very much and the consumables should be reasonable.

I would think even with cleaning the ram with alcohol the JB weld will not last very long as rams are a extreme wear point, I believe thats why there chrome plated, and I'm wondering how bad the JB will tear up the seals if/when it comes off. Just a thought.

T_Bone

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Steve U.S. Alloys

10-11-2000 07:27:10




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 Re: Need know how to fill dents in Hydr Rods? in reply to Abe Bunker, 10-07-2000 19:26:15  
Hi Abe,
If you know someone who has one of the hot process torches, they can repair the rod easily and permanently.

I sell them quite often to equipment rental stores and job shops for that purpose among other things. The powder we use won't rust or corrode and it goes on 2000�F colder than the melting temp of chrome. They finish with emery cloth or a small file.

Another method used is the arc gun which is most often used to coat the entire length of the ram. Heat input can be held below 200�F with that process. The ram is turned off .015" or so per side and the ram is built-up about .020" over per side. The ram is then ground or finish machined with carbide tooling to OEM specs.
Steve

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T_Bone

10-11-2000 10:34:28




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 Re: Re: Need know how to fill dents in Hydr Rods? in reply to Steve U.S. Alloys, 10-11-2000 07:27:10  
Hi Steve, What approx. does a hot process torche sell for ? Do you know where I can read more info about the process? Sounds like a interesting process!

T_Bone



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Steve U.S. Alloys

10-12-2000 07:47:21




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 Re: Re: Re: Need know how to fill dents in Hydr Rods? in reply to T_Bone, 10-11-2000 10:34:28  
Hello T-Bone,
I appreciate the inquiry and have sent you an e-mail in response.
Steve



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Paul

10-08-2000 21:27:20




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 Re: Need know how to fill dents in Hydr Rods? in reply to Abe Bunker, 10-07-2000 19:26:15  

There is a co. in L.A. that replates rods reasonably, they do good work all my bent ,etc. rods go there
let me know if u r intersted in their services....Paul



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Fred OH

10-08-2000 14:03:24




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 Re: Need know how to fill dents in Hydr Rods? in reply to Abe Bunker, 10-07-2000 19:26:15  
It has been done successfully by a person near here with body filler. The shaft was full of small rust pits. I would say that your method of using epoxy should hold to a clean surface too, maybe better. As a welder, I wouldn't braze them up. L8R----Fred OH



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ltf in nc

10-08-2000 08:28:01




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 Re: Need know how to fill dents in Hydr Rods? in reply to Abe Bunker, 10-07-2000 19:26:15  
Abe, I have never done this before. I always polish the rods with emery cloth and use the equipment. If I was going to try to fill the voids I would use the following product. It is impervious to grease, gas and oil. It is cheaper than J B Weld and has a history of doing some fantastic fixes.
Link



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