In article ,
Karl Townsend wrote:

The AC broke in my John Deere. AC is needed a bit more in a tractor
cause you get A LOT of heat off the machine, the cab is all glass, and
one little window to open. Easily 20 degrees over outside.

My neighbor is an HVAC tech. We found a hole in the condenser caused
the failure. First braze attempt still had a small leak. The second
attempt, the braze slumped into the line and party blocked it. Now I'm
FUBAR.

Somehow, I need to cut this braze out and weld a patch over it. Or
pull a 180 U off of one end and bypass this run. It is the first top
run on the condenser. Anyone successfully done either operation?

I looked for generic replacements. John Deere isn't listed. No joy
trying to find one based on length and width. For those that don't
know, John Deere selected their tractor color because of the amount of
green you need to buy a part. Anybody know of a place that will supply
a condenser that fits within a certain height and width? I do know a
machinist that can build a bracket.

HVAC condensers are not magic. You can replace the whole core if
necessary, so long as the new core is the same size (heat transfer fin
area) or perhaps a little bigger that the original, and the tubing size
is a reasonable match.

I assume that the tubes are copper. The usual braze filler is
phosphorus copper, which is self fluxing on copper.

Probably the best source of a core is the automobile aftermarket. Do
the research in the junkyard, then buy a new core for installation.

http://www.amazon.com/Delphi-EP20017...or-Core/dp/B00
0CGDEQY

Joe Gwinn