My Tractor Forum banner

GT275 Traction Belt doesnt run smooth

1430 Views 3 Replies 3 Participants Last post by  bontai Joe
Good Morning,

First time poster, I appreciate everyones insight. I went back several pages and searched but probably don't know the right terminology.

I am the second owner of the above machine. Overall a pretty good machine, I've kept the maint up on it as much as I know how.

I have done most of the maint since I've owned it. I use it to cut a small ( in relationship to most here) yard, but, I have a big hill which is the most important reason for the large tractor.

I have noticed that the traction belt doesnt run smooth, it bounces around crazy between the pulleys and sheaves. I replaced the belt and it still does it. I've also replaced the bushings on the idler arm and ordered a new spring. When the mower is running, I can pull the idler arm and get more tension on the idler and things smooth out a bit. So, we'll see.

How do you diagnose worn pulleys and sheaves? They all seem to spin fine without any grinding or noise, how do you determine if the opening is too worn out? I'm wondering if they are so worn out that the channel the belts ride in are going too far in and pinching inside the pulley.

I could begin replacing them all, but, i hate throwing money at it until it goes away.

Any thoughts you all might have would be greatly appreciated.

1 - 1 of 4 Posts
It's normal for belts to look like they are vibrating. As for the grooves in the pulleys being worn, they won't pinch the belt. What happens is the sides of the belt wear causing the belt to sit deper in the groove which is ok until they get deep enough to touch the bottom of the groove. Once that happens, the belt will loose it's grip and slip. "V" belts work by gripping on the sides, not the bottom. As to tell if the pulleys are worn, you have spun them and felt no roughness, also check to see if you can grip them and make them wobble. That would indicate worn bearings. My guess is all is ok. The mower deck on my 316 was replaced about 20 years ago, and the bearings are still good. I replaced it because the first 6 years, I used it commercially, cutting about 12 acres or more a week. The deck shell itself was so beat up, it wasn't fixable.
See less See more
1 - 1 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.