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Crankshaft reclaimation

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Jackie Dantzler

09-09-2002 11:05:25




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I have run into several situations where the cranshaft in the engine someone was restoring had one or more "bad" or "burnt" journals. I found a place that checks the crank for cracks, sub-merged arc weld or "build up" the journal or journals damaged and straighten it and then turn the whole shaft to bearing sizes that you can still buy. If anyone is interested or needs this kind of service they should contact a company called JKK Machine in Louisiana. I think their toll free number is 888-882-7579. Good luck and happy restoring!

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SEAMO

09-14-2002 14:45:50




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 Re: Crankshaft reclaimation in reply to Jackie Dantzler, 09-09-2002 11:05:25  
Gleason Submerged arc is the best I have seen on crankshaft repair. This is the company that builds and sells the equipment. I think they have a Web. Earl



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Jackie Dantzler

09-16-2002 05:52:06




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 Re: Re: Crankshaft reclaimation in reply to SEAMO, 09-14-2002 14:45:50  
Seamo, I have a name for that company doing the crank work. It is All American Crankshaft Co., LLC in Louisiana. These people have been around the industry awhile, but just opened the crankshaft business over the last year or so. If anyone needs their help, I would reccomend that you call them yourself. 318-473-0037. Good luck. Jackie



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Nellie

09-14-2002 04:09:21




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 Re: Crankshaft reclaimation in reply to Jackie Dantzler, 09-09-2002 11:05:25  
"Spray welding' is a common fix for many shaft type items and flat pieces as well. Different powders are used to match different materials and hardness. However there are limitations, fillet harded cranks found in modern diesel shouldn't be done. It can be a costly method of repair, usually it is cost effective if used or replacement parts are not available. There are thousands of shops that can do 'spray welding' around the country.

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BOB

09-15-2002 18:45:05




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 Re: Re: Crankshaft reclaimation in reply to Nellie, 09-14-2002 04:09:21  
spray welding just shrinks the added metal so can,t be used on surface that has bearing running on it but can b used where m race doesn,t turn. However osha has put some restrictions onprocess that a lot of shops can,t or won,t do it. It does have a real use tho. I had a crankshaft welded and then straighted and so far so good with standard bearings



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Jackie Danztler

09-16-2002 06:05:31




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 Re: Re: Re: Crankshaft reclaimation in reply to BOB, 09-15-2002 18:45:05  
Nellie and Bob brought up good points so I called and spoke to Lewis at All American Crankshaft and I asked him about this "process" that they use. He stated that the submerged arc welder by Gleason is built for shaft welding. The journal and radius wire is suited to the specific crankshaft application. For example, there is a specific kit for forged or steel diesel engine cranks, etc. He stated that the radius can indeed be welded and repaired, as can the thrust surface. He said the key to sucessful reclaimation of a crank is the heat treating oven. It is there that the crank is stress relieved, so that it maintains a flexability that will prevent breakage. Just welding alone can create a brittle situation. He further stated that in the course of reclaiming a crank his machinists will re-mag and check straightness four and five times prior to final grinding and polishing. He believes the only limitations to this process currently is that it will not adequately salvage a ductile iron or "soft" shaft like the Deere power tech series yet. Maybe someone in the aftermarket area will come up with a replacement shaft for this application. I think I got that all right. Anyway, there's the info for any engine people out there. Go out and have a great Monday. HA! HA! Jackie

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