540 RPM PTOs - Spline Sizes ?

jgc

Member
I see that there are different sizes of 6 spline PTO shafts.

Example: Listed here in YT;
PTO splined adaptor and reducer. 1-3/8 female(6 spline) to 1-3/4 male(6 spline), 2-1/2 long for use with implements designed for John Deere model G tractors.
Part No: R403


1. What is the most popular size?

2. What size is the spline shaft on the late production "un-styled" model "D" tractors?
 
The G was the only tractor that used a 1 3/4 inch PTO shaft that I know of. I have never seen a implement with a 1 3/4 shaft, unless maybe, they were all converted. We had a G at one time, and had the PTO drive shaft cut down to 1 3/8.
 
We had a G when I was young and had a big to 1 3/8" adapter,, I wonder if any other makes used the big shaft ??
 

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