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JD A Carb ?? Progress

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dwm

06-08-2003 10:10:54




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Working on a 1945 A with a DLTX-71. Believe this is not the absolute 'correct' carb, but will work okay. Having trouble getting it to hold at the needle and seat. Have taken apart several times and now the float leaks. Any ideas on finding leak and success rate in re-soldering? Is there a good source for this float? Available from John Deere? The first few times, the float was okay, but after two different new needles/seats, the carb. still leaked gas through. Correct screen in new sediment bowl and carb. inlet bowl are in place. Any ideas here other than shut gas off at the tank when not in use?

After getting this A into the shop and identifying the year (serial plate missing) with the help of this forum and a set a manuals, the tractor now runs well and the body and paint work is coming along. BTW, new bearings on the steering shaft in the steering gearbox did wonders for free play, tractor now drives great with no wobble in the front wheels. Thanks for the continued help..... dwm

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Clooney

06-08-2003 15:26:59




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 Re: JD A Carb ?? Progress in reply to dwm, 06-08-2003 10:10:54  
dwm, if the float is just cracked at the seam or has a slight leak at the pivot solder joint it can easily be soldered. Clean it good, use a flux, & DON'T USE AN OPEN FLAME.
~On finding the leak...Take the float bowl off the carb, plug the bottom hole with a cork & run a liquid supply to the fuel line fitting,,Then watch it.
~With all those needle & seats I would suspect a porosity at the bottom of the fuel inlet screen well area [the casting where the seat screws into]..
~If it only leaks with the float bowl on the carb, then suspect a plugged bowl vent.

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dwm

06-08-2003 17:06:47




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 Re: Re: JD A Carb ?? Progress in reply to Clooney , 06-08-2003 15:26:59  
Clooney,
Funny you should mention porosity. One of our initial gas leaks (there were several), was the fuel inlet bowl at the top gasket. When we pulled the top off and wiped it dry, the inlet bowl still had gas in the bottom. After sitting for a few minutes with the top off, gasoline began weeping up around the top edge of the bowl. You could wipe it off, and gas would re-appear. The carb body casting was acting like a sponge. It seems to have slowed down, but after a new gasket there, it now leaks around the top center-cap hex nut holding the top of the inlet bowl on. Will this soak up and quit eventually? This tractor had been sitting for a while, and there were signs water had been in the carb. Thanks, dwm.

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mark

06-08-2003 12:52:01




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 Re: JD A Carb ?? Progress in reply to dwm, 06-08-2003 10:10:54  
the float is available from Deere. very hard to solder and make it work



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