gball 0 #1 Posted April 29, 2013 Hello from northern Michigan. i am working on a neighbors tractor and need some help. not sure of the year to start with. it is a Wheel Horse B-100 Automatic. Mod# K241s, Spec# 46636d, Ser# 7160060. the main issue i am having it finding a drive belt for the trans. it had a belt on it but it was destroyed. the tensioner spring was broke so i am guessing who ever worked on it before just measured for a belt with out the tension on it. i was able to measure the old belt (83") but that seams a few inches too short now that i replaced the spring. car quest up here couldn't find a B-100 and i looked thru the manual page at the LUB and BELTs charts but don't see the model. what am i reading wrong here? Share this post Link to post Share on other sites
KC9KAS 4,744 #2 Posted April 30, 2013 Well, my 1975 part # is 7478, but I don't know the actual size.....I'll work on that. #7478 HB/5L 84.22" Share this post Link to post Share on other sites
gball 0 #3 Posted May 2, 2013 Just an update. Car quest crossed that 7478 to there part # 6984. which is 21/32" x 84". Fit and tractor runs fine. Job done. Thanks for the Help. Share this post Link to post Share on other sites
KC9KAS 4,744 #4 Posted September 2, 2014 I just put a brand new Toro belt (7478) on my B-100 and near the rear drive pulley, under the idler pulley, the belt insides hit each other. The hydro also seems to pull the engine down! Share this post Link to post Share on other sites
