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JD Model B Noise

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Chuck F

07-17-2002 18:34:26




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I just got a Model B (S/N 269065), after rebuilding the carb and the magneto I got it running. It runs fine but shortly after starting it started making a skreeching noise in the area of the rear of the magneto. I shut the tractor off and pulled the cover from the rear of the magneto, looking at the gear that is driven from the crankshaft I could see alot of rust and the bearing that rotates around that shaft needed lubrication.
OK, I know that I need to clean up or replace that bearing, but what do I need to do to ensure that oil from the crankcase is getting to that area of the engine? The oil pressure on the gage while the engine is running is up in the high range. Since I found rust on that bearing, should I suspect that the journals to this area are clogged too?

Please let me know if anyone has any experience with this type of issue.
Thanks
Chuck

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ChuckW

07-18-2002 04:47:53




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 Re: JD Model B Noise in reply to Chuck F, 07-17-2002 18:34:26  
I believe Clooney is on target, however I still believe if you can get some lubricant on the parts you will be okay....naturally you can tear it apart but you might remedy this without drastic work. Take your Mag off and spray PB Blaster on the bushing, see if you can loosen the governor housing without tearing up gasket, don't take all the the bolts loose then flood with blaster. Put a couple of cans of motors mystery oil in crankshaft then run for a while. I bet your problem will dissapear....

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JOhn

07-18-2002 13:55:52




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 Re: Re: JD Model B Noise in reply to ChuckW, 07-18-2002 04:47:53  
What state do youlive in chuck. I sure hope it is a long way from me. I sure wouldn't want to buy a used tractor from you if your repair for a rusty ball bearing is to squirt some lubricant on it. Once those things pit or rust they should always be replaced.



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ChuckW

07-17-2002 18:59:45




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 Re: JD Model B Noise in reply to Chuck F, 07-17-2002 18:34:26  
I would try spraying lubricant/penetrant into the housing and trying to free everything up, I believe it will be okay once you run it for a while, you might flush out the crankshaft make sure there are no loose debrie.



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Clooney

07-17-2002 18:58:25




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 Re: JD Model B Noise in reply to Chuck F, 07-17-2002 18:34:26  
Chuck, you are talking about the magneto? Are you actually referring to the governor? ~The magneto is driven by the governor [the magneto is on the R/H side of the governor].
~The governor is driven from the crank & cam gear.
~If you are really talking about the governor, it is oiled from an oil line that pumps oil onto the fan gears & the oil is thrown around in the governor by the spinning gears. If the tractor was sitting for a long time it takes a while for the oil to get thrown around & oil the L/H governor bearing. ~If the L/H governor bearing is rusted the R/H bearing [behind the mag drive flange] is probably also rusted & if that is the case the governor should be removed & disassembled to at least check the bearings & replace the parts needed.
~If you are really talking about the magneto you will have to be more specific on what type of mag, what cover you are referring to & what bearing is spinning & rusty..... .

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ChuckF

07-18-2002 03:43:52




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 Re: Re: JD Model B Noise in reply to Clooney, 07-17-2002 18:58:25  
Clooney,
You were correct in thinking that the rusty portion I was referring to was the govenor. Based on your comments I guess I will take the entire assembly apart and clean it up and inspect for anything else that might need attention. Thanks for the advise and help.

Chuck



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