Posted by George in NW Michigan on Thursday, December 16, 2004 at 11:46AM :
In Reply to: Belt Pulley Questions posted by dave horvath on Thursday, December 16, 2004 at 8:20AM :
I think the old Fords and Fergusons used the 1 1/8 shaft size, whereas the PWs and all later tractors use 1 3/8.
There are adapters and ways to make this work as mentioned in the PWA article.