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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum

Super 77 Ring and Pinion

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Author  [Modern View]

09-14-2018 06:24:36

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I know Oliver offered 5 different ring and pinion combinations for the 88, but does anyone know how many R&P combos were available for the 77/S-77?
Currently goes 3 mph in 1st gear at 1500 rpm with 16.9-38 Firestone's.

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09-14-2018 07:23:23

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 Re: Super 77 Ring and Pinion in reply to Ollie88D, 09-14-2018 06:24:36  
Last three digits are 702.

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J. Schwiebert

09-15-2018 17:57:47

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 Re: Super 77 Ring and Pinion in reply to Ollie88D, 09-14-2018 07:23:23  
There you had your choice of the 702 and the slow speed 705. The 702 was a set of 11/ 50 gears 2.45 MPH @ 1600 on 11-38 tires @ 1600 RPM or 705 with 9/48 bevels which was 1.91 MPH at the same RPM and the same size tires.

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J. Schwiebert

09-14-2018 06:30:12

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 Re: Super 77 Ring and Pinion in reply to Ollie88D, 09-14-2018 06:24:36  
To start with what are the last 3 digits of your serial number 702 or 705?

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