Crank Question

I'm not sure what the od of a 60 rod journal is, but lets say it's 3.000". If it had been turned .010" before, and you go .010" again, you'll still have 98.6% of the original cross-sectional area.

I wouldn't worry about losing any strength, and I think that might work out to the less expensive route, but you'll have to check out your options.

Frank

First, the intended use of the tractor - if it is to be restored for show, farm work, or stock pulls, I don't see a problem with going oversize. Especially with the size of the journals on the JD 60 crankshaft. Bear in mind that many pullers will offset grind a rod journal, removing .250" of material to gain added stroke-with decent results. This being said, I feel reliability would not suffer if the tractor is used normally. If you were building a 100 hp JD 60 with very high compression or very high RPM, I probably would NOT recommend this repair.

The second factor is the shop doing the work. The shop must be aware of the neccessity to ensure the oil holes in the crank still line up with the oil hole in the bearings after grinding. This is due to the oil hole being drilled through the crank at an angle starting at the center of the journal. When material is removed, the hole is moved to one side or the other and is no longer in the center. This is simple to remedy by grinding, but absolutly neccessary!

I hope this helps, If you have any more ?'s E-mail me and I will be glad to help. LATER, Pat