Just got 2 belts, one 5/8" x 29" and 5/8 x 35" as per the manual and your part numbers. The 29" belt fits fine but there is no way on this earth the 35" belt with go over the pullys. I have a 37" belt that fits on and the tractor drives but the ride a matic system is on full all the time because the 37" belt is too slack. Would it be worth getting hold of a 36" belt just for trial purposes just to see if it works. Somthing odd seems to be going on...
Yes, I just looked up your belts last night but forgot to post.
You are correct on the sizes.
If you look on the partslist you will see "spec" I believe that is supposed to read "special" Usually when the belt is listed as special it is somehow slightly different then your average 5/8x35'' belt.
The intermediate pulley should be a dual groove, and the center flange of the pulley must be free to move side to side to obtain the variable speeds. ....Check that the flange moves easily.
I believe the 35" belt is the correct size. .....It's been many years since I worked on one, but I think you have to fight the spring tension to get the belt on. .....You need to get the intermediate pulley where the the center flange moves to the side allowing the smallest diameter so the belt can be put on. .....It will probably be easiest to install the belt onto the upper pulley first, and then "roll" it onto the lower pulley while you fight the spring tension.