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51B Cracked Frame

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Greg

11-03-1999 18:14:02




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The pressed steel frame has a significant crack in the steel weldment where it bolts to the crankcase. This is actually a recrack of a prior repair attempt. You can see the frame flex when moving. Can I weld the crack in place or should I remove the frame from the tractor? I view structural integrity over looks but would like to make this repair invisible and would consider a teardown if conventional wisdom agrees. What are the opinions? Thanks, Greg

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Plant Doctor

11-04-1999 05:28:46




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 Re: 51B Cracked Frame in reply to Greg, 11-03-1999 18:14:02  
Greg: I think Patrick has given you some good advise. I had about 150 acres of asparagus and used a 51 "B" to do the cultivating. I had long axles on the "B: and the wheels out to 10 feet and I broke the frame on both sides as you discribed. It has been my experience that the mig weld works the best in this situation. Why, I am not sure, maybe because the mig doen't heat metal as mush as a stick welder? But after the "B" frame was mig welded I had no farther problem. And yes, the frame was not removed from the tractor to do the welding. Give it a try and good luck. I have a soft spot in my heart for the JD "B", I had 4 of them for cultivating back with I was farming like a maniac.

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PATRICK ASKIN

11-03-1999 18:32:00




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 Re: 51B Cracked Frame in reply to Greg, 11-03-1999 18:14:02  
GREG,
MY ADVICE WOULD BE TO FIRST TRY REWELDING. GRIND ALL THE WELD OFF AND TAKE A DIE GRINDER AND V OUT THE CRACK SO YOU START WELDING IN THE CENTER AND RUN A WELD DOWN THE CENTER, THEN ONE ON EACH SIDE UNTIL THE CRACK IS COMPLETELY FILLED.I WOULD USE A MIG WELDER(WIRE WELDER)FOR THIS JOB SO THE HEAT AND PENETRATION COULD BE CONTROLED BETTER.
SECOND IF THIS WELD REBROKE YOU WILL NEED TO BUILD A PLATE OF STEEL TO COVER THE CRACK. A DIAMOND SHAPED PIECE WILL BE THE STRONGEST. POSITION THIS PIECE OVER THE CRACK AND WELD IF ALL THE WAY AROUND. I HOPE THIS HELPS. PATRICK A.

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