Xabub 0 #1 Posted June 6, 2016 (edited) Hi, I'm new. So be gentle. I have a couple 312-8 tractors 90's models and had an issue with the front block nut falling off and the pulley subsequently falling off as well.. Then the belt fell off and stopped mowing. I found the pulley in the yard but am unsure if there are spacers or washers or whatever in between the pulleys. Anyone have a parts diagram? I can't find much on it. I tried toro.com and failed miserably. I appreciate your help! Edited June 6, 2016 by Xabub Typos Share this post Link to post Share on other sites
Racinbob 11,916 #2 Posted June 6, 2016 This should help you out. 1 Share this post Link to post Share on other sites
daveoman1966 3,839 #3 Posted June 6, 2016 HERE IS A PIC OR 2 5 Share this post Link to post Share on other sites
Xabub 0 #4 Posted June 6, 2016 Awesome. I found spacers online...but may use brass in the meantime. I could not, however, find a nut OEM. I was thinking of two shallower nuts and locking them together to keep it from falling off again. Share this post Link to post Share on other sites
953 nut 59,743 #5 Posted June 6, 2016 If you have a Toro dealer or a good hardware store or industrial supply like Grainger or McMaster-Carr should have locking nuts. 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,441 #6 Posted June 6, 2016 1/2" long spacer part number 101757 is on the outside between the pulley and cover. 5/8" long spacer part number 101734 is between the pulleys. Spacer ID needs to slip over 3/4" shaft. The nut is a 3/4"-16 Nylok nut Garry 1 Share this post Link to post Share on other sites
cleat 7,237 #7 Posted June 6, 2016 I think nyloc is a good idea but none of mine are. Maybe they used to be locking but now they just spin on. However, I tighten them very tight using a 1-1/8" wrench. I like the older cast iron pulleys like in daveoman1966's post You just replace the bearings when they wear out and good for another 100,00. 1 Share this post Link to post Share on other sites
