Derek W 28 #1 Posted 10 hours ago Hi all! I've recently changed out the drive belt on my 312-8. I removed the old belt (which really seemed to be slipping). I measured it to be 1/2" x 80.5". I went to my local Tractor Supply and found an 81" belt. I brought it home and installed it. The belt still seems to be slipping. It kinda seems like the clutch idler pulley isn't being pulled back enough, like maybe the belt should be a bit longer, so that the geometry of the pulley arm may add more pressure to the pulley. So, I'm wondering.....what is the stock belt length on these machines? Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,776 #2 Posted 10 hours ago Single cylinder transmission drive belt 93-9808 - HB x 82" or 5/8" x 82" You still have the gas cylinder that dampens the idler? It may not be acting as designed. 1 Share this post Link to post Share on other sites
Handy Don 14,869 #3 Posted 9 hours ago 39 minutes ago, gwest_ca said: Single cylinder transmission drive belt 93-9808 - HB x 82" or 5/8" x 82" You still have the gas cylinder that dampens the idler? It may not be acting as designed. Good catch on the gas cylinder, @gwest_ca! 1 Share this post Link to post Share on other sites
Derek W 28 #4 Posted 7 hours ago 2 hours ago, gwest_ca said: Single cylinder transmission drive belt 93-9808 - HB x 82" or 5/8" x 82" You still have the gas cylinder that dampens the idler? It may not be acting as designed. Youre saying that a 5/8" belt is required? That would definitely apply "more grab." I bought the tractor with a 1/2" belt. As for the gas cylinder....it has been removed and placed into the garbage bin because it was definitely not working at all. Push it in and it just sits there. Pull it out and it just sits there. 1 Share this post Link to post Share on other sites
ri702bill 10,245 #5 Posted 7 hours ago (edited) 14 minutes ago, Derek W said: As for the gas cylinder....it has been removed and placed into the garbage bin because it was definitely not working at all. Push it in and it just sits there. Pull it out and it just sits there. You need to add the proper return spring to tension the belt instead of the problem prone gas spring. I can't recall the P/N, perhaps another Member can... Found it! 108035 Edited 7 hours ago by ri702bill 1 Share this post Link to post Share on other sites
Ed Kennell 43,322 #6 Posted 3 hours ago 7 hours ago, Derek W said: Hi all! I've recently changed out the drive belt on my 312-8. I removed the old belt (which really seemed to be slipping). I measured it to be 1/2" x 80.5". I went to my local Tractor Supply and found an 81" belt. If that 1/2" belt is clean and you have the sleeve, take it back to TSC for a refund and buy a green Aramid 5/8 X 82 belt. Share this post Link to post Share on other sites
