[AT] John Deere Projects UPDATES

[Bill Brueck]

Dean, I’ve not been a fan of trying to shim up a loose flywheel.  A parts tractor is generally the way I fix things like that.  I bought a parts 70 a while back with bad crank and fw.  PO had even tried to weld the fw onto the shaft but of course it didn’t hold…and looks really ugly  Then recently I found another 70 with a few missing but different parts.  So I’m optimistic about having a tractor between the 2.

B²
Confusion is a higher state of knowledge than ignorance.

From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of deanvp at att.net
Sent: Wednesday, July 1, 2020 3:12 AM
To: 'Antique Tractor Email Discussion Group' <at at lists.antique-tractor.com>
Subject: Re: [AT] John Deere Projects UPDATES

Bill,

Thanks for doing the work to summarize the weights of the various flywheels.   I wouldn’t expect there to be much difference in weight  withing the normal model progression of B, 50, 520, 530 or A, 60, 620, 630 or G, 70, 720 vs 730 with the exception of the diesel models.  The x20 and x30 engines were essentially alike with the engines identical between the 1958 x20’s and x30’s.  I would expect a slight reduction in flywheel weight for the x20 and x30 series over their predecessors due to the increase in top  RPM.

However, the issue at hand that is really needed to be looked look at is what has happened to the splines on the crankshaft due to the cracked/loose flywheel.  The may be damaged to the point that it is going to be very difficult to keep the replacement flywheel tight enough to not knock as well.   And the replacement flywheel may be worn as well. A famer fix might be using beer can shims, (shim stock)  but I don’t know how successful that would be,  If it gets bad enough the crankshaft has to be replaced or reground.  $$$$$

Dean VP
Snohomish, WA 98290


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