Crmaverick 91 #1 Posted April 6, 2020 On my 753 I’m looking to add more slack to the belt when I press the brake. The belt is still slightly engaged on the pulley, anyone know how to add more slack by adjusting the belt tension that the brake applies? Also can the diff on these lock up? Sometimes I spin two tires if I’m stuck, sometimes only one tire spins if I’m really stuck. thanks Share this post Link to post Share on other sites
953 nut 55,771 #2 Posted April 6, 2020 Is this a new problem or has it been coming on slowly? Are all of the belt guides on the engine near the drive belt set where they are almost touching the belt? How old is the belt? Is the belt you are using a fabric wrapped belt? The Kevlar wrapped belts from Tractor Supply work well. I think yours should be a 4L-700 (A-68) size. 1 Share this post Link to post Share on other sites
Crmaverick 91 #3 Posted April 7, 2020 14 hours ago, 953 nut said: Is this a new problem or has it been coming on slowly? Are all of the belt guides on the engine near the drive belt set where they are almost touching the belt? How old is the belt? Is the belt you are using a fabric wrapped belt? The Kevlar wrapped belts from Tractor Supply work well. I think yours should be a 4L-700 (A-68) size. I would say slowly and it only does it sometimes. Sometimes the belt fully disengages. Not sure on belt age I think it’s Kevlar. I’ll check on that tomorrow on the guides 1 Share this post Link to post Share on other sites
wallfish 17,079 #4 Posted April 7, 2020 At the brake band there's a 3/8 threaded rod with a nut (9/16) to adjust the brake band tension. Backing it off allows the idler pulley which tensions the belt to move down a little more to slack more belt. There's a fine line on adjusting it properly. The belt guard needs to be on the tractor to guide the belt or it will not slack properly. The engine pulley groove must be clean and smooth. No, you can not lock the differential. 1 1 1 Share this post Link to post Share on other sites
Crmaverick 91 #5 Posted April 8, 2020 On 4/7/2020 at 6:22 AM, wallfish said: At the brake band there's a 3/8 threaded rod with a nut (9/16) to adjust the brake band tension. Backing it off allows the idler pulley which tensions the belt to move down a little more to slack more belt. There's a fine line on adjusting it properly. The belt guard needs to be on the tractor to guide the belt or it will not slack properly. The engine pulley groove must be clean and smooth. No, you can not lock the differential. I adjusted the brake band, it works but you really have to burry the pedal far down to get that belt to fully disengage. Is the belt guide adjustable? Share this post Link to post Share on other sites
wallfish 17,079 #6 Posted April 8, 2020 Are there any small belt guides attached to the engine around the drive pulley? They would be made of 3/16 or 1/4" round bar and attached to the engine block with bolts. Share this post Link to post Share on other sites
Crmaverick 91 #7 Posted April 8, 2020 1 hour ago, wallfish said: Are there any small belt guides attached to the engine around the drive pulley? They would be made of 3/16 or 1/4" round bar and attached to the engine block with bolts. Looks like I don’t have one for the drive belt? Share this post Link to post Share on other sites
wallfish 17,079 #8 Posted April 8, 2020 (edited) This tab on the belt guard can be adjusted. Bend it close to 1/8" from the belt with the pedal out and belt tight so you can just do it with it parked and not running. Is your main issue that the trans gears are grinding when shifting? Edited April 8, 2020 by wallfish Share this post Link to post Share on other sites
Crmaverick 91 #9 Posted April 8, 2020 1 minute ago, wallfish said: This tab on the belt guard can be adjusted. Bend it close to 1/8" from the belt with the peddle out and belt tight so you can just do it with it parked and not running. Is your main issue that the trans gears are grinding when shifting? Yeah exactly a little grind going in. Thanks Share this post Link to post Share on other sites
wallfish 17,079 #10 Posted April 8, 2020 (edited) The idea is to support the belt loop around the engine pulley enough so the belt doesn't drop in the pulley groove from the top or stay in the groove on the bottom. Sometimes bending that top section of the guard up or down will help as well, but keep in mind if you bend it down, it also raises that bottom tab and vise versa if bending it up. If the belt was too short to begin with, that could be a problem Make sure the pulley groove is clean an smooth. rust or paint in there will cause that too Edited April 8, 2020 by wallfish Share this post Link to post Share on other sites
squonk 41,329 #11 Posted April 8, 2020 Make sure the tractor is stopped when shifting Share this post Link to post Share on other sites
