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JD 2520 ROD BEARINGS NEEDED .002 over

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tom

11-08-2002 14:12:20




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Any one out their have any NEW .002 oversize rod bearings for a JD 2520 DIESEL with the 219 motor they would like to sell. This was a item that was made by FM (FEDERAL MOGAL) and sold by JD in the 70's and is no longer avaiable I really don't want to pull the crank to regrind if i don't have to but if nessary i will. ANY HELP WILL BE APPREICATED THANK YOU IN ADVANCE TOM....




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Seamo

11-08-2002 20:54:11




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 Re: JD 2520 ROD BEARINGS NEEDED .002 over in reply to tom, 11-08-2002 14:12:20  
Try Tom Underwood at 785-749-5231 he has a ton of new old obsolete parts for all brands and he doesn't over charge you. Earl



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G-MAN

11-08-2002 17:58:44




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 Re: JD 2520 ROD BEARINGS NEEDED .002 over in reply to tom, 11-08-2002 14:12:20  
Have you had your dealer check to see if any other places would have them as NOS? That might be a possibility, but I'm sure the reason they're not available is that there was a lack of demand. Like I posted below, I've never seen a situation where even a polished std crank wasn't well within spec with a std bearing. Have you checked clearance with a standard bearing using plastigage or by measuring bearing bore and journal diameter? I would start there before tearing my hair out trying to find those undersize bearings.

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mike

11-08-2002 16:14:33




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 Re: JD 2520 ROD BEARINGS NEEDED .002 over in reply to tom, 11-08-2002 14:12:20  
Why would you need .002 over when most clearances
have at least a .002 variance? Sure you don't mean
.020?



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G-MAN

11-08-2002 17:54:53




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 Re: Re: JD 2520 ROD BEARINGS NEEDED .002 over in reply to mike, 11-08-2002 16:14:33  
Mike, they did used to offer .002" under bearings. I believe they were intended for situations where there was enough crank wear to put the clearance at the top end of spec, but the crank journals were still in good enough condition to not warrant removing the crank for polishing or grinding, or could be cleaned up well with emery cloth. I haven't seen a situation yet where even a polished JD crank wasn't still withing spec with std bearings, but I suppose it is possible. I would think that the .002" under bearings might result in insufficient clearance. If it were me, I would get one standard bearing and check the clearance on several of the journals and see how it comes out. JD cranks just don't seem to wear enough to need anything but standard bearings unless they are scratched and need polished, even when up around 8,000 hours or more. And we never grind cranks undersize, as we have had problems with them breaking after being ground. Polishing is as far as we go. Other than that we install new cranks.

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