Re: Farmall 560 and 660 Diesels

Posted by Wardner on November 17, 2006 at 22:41:34 from (206.148.20.49):

In Reply to: Re: Farmall 560 and 660 Diesels posted by Ron in Nebr on November 17, 2006 at 21:32:04:

The differential gears are the same for all 560's and the 660. I am not getting into tooth counts in the transmission because there are "notes" A thru F and my dyslexia cannot cope with that kind of overload unless it is necessary.

The increased RPM of the 660 is offset with the planetary hubs at the end of the axles. 560's and the 660 have nearly the same top speed. I read somewhere recently that the planetary setup adds 1500 lbs to the 660.

So basically the 660 is different in the taller hood at front of tractor due to the larger radiator. Extension on the cowl dog legs were attached with spot welds. The grill is the same but a cast iron spacer is added beneath it. The badge is obviously different. The fan and shroud are different. Everything else remains the same until you get to the axle shafts, their housings, hubs, wheels, wheel weights, and tires. Attachments like drawbars may be different but I don't know. They are confusing. The 650 (not a typo) and 660 use the same draw bar but carry different numbers. The drawbar struts on the two tractors are certainly different.

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