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rear for case 648 compact tractor

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joe johnston
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2002-10-28          44331


Any know where I can get a rear end for a case 648 garden tractor? I believe the 644 and 646 as well as some of the Ingersoll units would work. The spool holding the spider gears in mine is cracked in several places. Because of this, a piece of metal broke became wedged and broke through the bottom of the case. I can be reached at ecphsca@yahoo.com.





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rear for case 648 compact tractor

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Ingersoll444
Join Date: Jul 2003
Posts: 3 Niverville NY
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2002-12-22          46424


As long as your tractor is not a backhoe model, a Case/Ingersoll 44x series rear will work. Now if you can find used guts, the hole can be welded. Where these rears crack is not a high stress area.

Paul ....


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rear for case 648 compact tractor

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TomG
Join Date: Feb 2002
Posts: 5406 Upper Ottawa Valley
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2002-12-22          46429


That's a good comment. It really does amaze me what can be repaired today. It seems like you seldom have to give up on anything.

I don't know if current techniques still require heating castings in big ovens before welding and if things like stress relief and shaft alignments remain problems.
....


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rear for case 648 compact tractor

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Ingersoll444
Join Date: Jul 2003
Posts: 3 Niverville NY
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2002-12-22          46460


I am not a good enough weldor to try welding cast, but I dont think you have to heat the whole thing, just the area around the repair. But I could be wrong.

Paul B ....


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rear for case 648 compact tractor

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TomG
Join Date: Feb 2002
Posts: 5406 Upper Ottawa Valley
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2002-12-23          46478


I'm not much of a welder myself and my experience is limited to gas. An old attitude was that cast wasn't welded, it was brazed.

I think that newer techniques are quicker and heat the casting less. The old problem was that to get a good weld the casting got hot enough to warp it. The weld took in a warped state and produced internal stresses and could throw bearing cups out of alignment when it cooled. Pre-heating a casting in an oven reduced the warping during welding.

Anyway, what ever the explanation is, people talk regularly about welding stuff that that I never would have dreamed about back in the late '60's when I was doing my bit of self-taught gas welding.

Since I'm on a subject where most everything sounds a bit fantastic to me, I'll throw in a comment I've heard several places about arc welding on tractors. The idea is that it's best to remove parts from the tractor to weld them. If welding is done on the tractor, the ground should be clamped as close to the weld site as possible. Wheels are convenient but poor places for the ground. High welding currents choose their own paths of least resistance and those could be through engine or drive train components.

People talk of eroded engine bearings and even fused gears. Sounds fantastic, but unlike urban rumors, you hear people say 'I've seen.....' or '....it happened to me.' I suppose I recall these stories because there was some recent talk about ROPS modification.


....


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