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John Deere Tractors Discussion Forum
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1946 JD A - Engine tune up

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uncle charlie

04-06-2005 16:02:34




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I would like to know what can be done to freshen up a JD A for stock pulling and to be used for plowing. (I'd post on the pulling page, but I don't need someone telling me to work on another color or to spend a lot of $$, not that you don't have to spend money - but not stroking cranks etc).

It's running, but probably has not been touched since new. Thanks.




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Walt in Jaxn Tn.

04-06-2005 19:12:28




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 Re: 1946 JD A - Engine tune up in reply to uncle charlie, 04-06-2005 16:02:34  
First I'd buy or borrow a compression tester, it will need to have a tip for 18 mm spark plug hole. Then test for compression. Folks here on this site will tell you what pressure to look for. ( 80 to 120 lbs. I think )The compression test will tell a lot about what is needed or not ( valves, rings ect. ) Since it's a "46" It's most likely a long hood "A" and if it has cast center wheels and a power lift, it's a heavy tractor and will have to run in a heavier class in tractor pulls ( I'm guessing on this one ). Check the clutch for adjustment and wear. Check the carb for adjustment and wear ( check the carb throttle shaft for side to side movement ) Check the governor shaft for side to side movement ( the shaft that comes out the top of the governor ) I'll think of more later, but if you check and repair what is mentioned so far it'll keep you busy for a while. --Walt--

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