Posted by Billy NY on May 05, 2009 at 07:44:44 from (74.67.3.238):
Seems the spring planting is moving along, but I've got a problem with my farmer friends John Deere 637 disc, bought new 2-3 years ago.
Right side front gang, fold down/up gang, attached to the tool bar (square tube)is a 1/2" x 3" x 3" x 12" mild steel angle, stitch welded to the tube and is what connects to the larger tube, that is connected to the cylinders which raise and lower the outer gang/wing. Problem is that darned angle ripped apart, I welded to the tube and the ripped areas, 7018 sure is strong, but the angle ripped again, I caught it prior to tearing off again, appears to be A60 mild steel.
I am not familiar with adjusting a large set of discs like this, though we seem to have it leveled up, depth and that center valley, outer windrow of dirt adjusted via the large crank in the center, he's got the book yet I've never had a chance to read it. I am thinking one of 2 things, either he keeps hitting something hard or something is out of adjustment, anyone have any ideas ?
Now, I burned off the 1/2" angle, barely nicked the tube with the torch 1-2 places, was a pain to get in there too, so I'll fillet those small spots with 7018, grind etc, other than those nicks you could see what you were cutting, so it was clean, I've often wondered if when you do that + heat, does the steel, (think the tube is A60 mild steel too) become compromised or embrittled ? This is the first time, but say that angle tears again, cut off weld, will this weaken that tube to any serious degree.
I called in to order the angle I need fabricated and will weld it in place, but I hope the darned thing does not tear out, I will weld just as the factory did, stitch like the others, and use mild steel, but had wondered if I beefed up that one, it would place the stress elsewhere, if so, the repair won't be easy, might be into more than a 12" piece of angle. Appreciate your input, he's got another 100 acres to do, most is farthest from the shop, so breakdowns will be a pain if they happen.
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