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JD A help

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Shot in the dar

09-12-2000 21:35:00




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Bought my first 2 cyl tractor "A" at a farm auction. Took a chance, it looked nice and seemed to run nice. Got it home, oil has lots of gas in it so I changed oil and filter. Is straight 30 recommended? Runs ok but seems carb out of adjustment. I played around with the 2 needles. Can someone tell me what does what or how you would adjust properly? Last question, when she idles way down, it seems to knock right below the base of the steering wheel pedestal. Is that crank or connecting rod slop?
I guess I am happy, just worried a little about the knock. Is there anything you can do other than tear into it?
Anyone want to sell me a manual? Its a 1950 model.
Thanks for anyones help or time. I know this site gets a lot of posts and soon it is gone.

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BE CARFUL!!

09-13-2000 13:48:17




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 Re: JD A help in reply to Shot in the dark, 09-12-2000 21:35:00  
Congratulations on your purchase, Just wanted to add to all the good information given here. Be careful when working in the crankcase of these old tractors and that you ALWAYS disconnect the battery ground cable first!! In event when hands and arms are in this area and the starter lever is accidentally bumped or leaned on the results are unmentionable serious crushing injury to the hands and arms. Be careful and enjoy. Just a little safety reminder, Dave Wickman

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Jim from Stonepile

09-13-2000 21:38:37




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 Re: Re: JD A help in reply to BE CARFUL!!, 09-13-2000 13:48:17  
I ALWAYS pull the plug wires!!! Fooling around doing what you're doing and turn the flywheel enough to trip the mag, and it could possibly start! That could lead to a forced change in your life style! Good luck-JIM



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John T

09-13-2000 07:26:21




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 Re: JD A help in reply to Shot in the dark, 09-12-2000 21:35:00  
Gas in the oil is often caused by a leaky needle valve/seat in the carb or a leaky float so until you get the carb checked, you better turn off the gas when not in use. The load needle initial setting is about 3/4 to 1 turn open back out after screwed down closed. Idle screw is more like 1 and 1/2 out from closed. Adjust the load needel at full rpm, open it till she riches out and starts to black smoke, then screw her back in about 1/4 to 1/2 turn. Some manuals say to do that with one plug wire removed I heard, but I usually dont. Adjust the idle needle at idle by screwing her down till she leans out, then open her about 1/4 to 1/2 turn is how I do but have no idea what any book says. The knock may be a loose worn rod bearing partly caused by that gas thinned oil. Remove the top crankcase cover and see if there is any play at all and if so, install a new babbit or bearing insert before you egg the crank, if its not already. Check the flywheel and clutch disk for play or slop because that can ruin the cranks end splines. I wouild use a good 10 w 30 or 15 w 40 oil. Let us know. John T

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Rollo Ingram

09-13-2000 04:49:25




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 Re: JD A help in reply to Shot in the dark, 09-12-2000 21:35:00  
It's not hard to "tear into it." Just remove the cover plate on top behind the governor, and you can get to the rod bearings to check them for play. You don't want to have to buy a crankshaft.



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Bayou Dave

09-13-2000 06:49:30




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 Re: Re: JD A help in reply to Rollo Ingram, 09-13-2000 04:49:25  
Also check your flywheel to make sure it's not loose. It will cause a heck of a noise. Make sure there is not too much side to side movement along the crank. Flywheel may need to be adjusted to get the play out. If you have electric start, that inspection plate that Rollo is talking about is just under the starter. Definately check those rod bearings. Congratulations on your purchase! Dave



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Jim from Stonepile

09-12-2000 22:08:27




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 Re: JD A help in reply to Shot in the dark, 09-12-2000 21:35:00  
Congradulations on your purchase!I have a "49 A. Love to hear those 2 cylinders work! Check in the archives for carb problems. Clooney has posts and diagrams in there on carb problems.If there is gas in the oil, there is definately a carb problem. I always turn the gas off at the sediment bowel for safety when not in use. The knock I am not sure about, So I won't guess. Enjoy!!! JIM



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Manternach

09-14-2000 08:58:04




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 Re: Re: JD A help in reply to Jim from Stonepile, 09-12-2000 22:08:27  
Gas in the oil could be caused by a bad diaphram in oil pressure shut off. It is located directly above sediment bulb. Good luck!



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