770 brakes

[Villengineer]

The brakes on my 770 will start to chatter as the tractor comes to a stop. It has developed this problem the last couple winters while moving snow. In the past it eventually will go away, but was wondering if anyone else has had this issue with the 770 or similar models. I've opened it up and looked at the brakes before and nothing stands out. Anybody know what causes this and/or how to make it stop?

 

[RoyJackson]

If there is plenty of liner left on the shoes, they're probably glazed. This can happen when brakes are lightly applied (and if you operate your 770 like I operate my 790, you do use the brakes lightly rather then throttle down sometimes).
So, you need to break the glaze (or live with the chatter). One way to do this is hold the brakes (fairly firmly) down while driving. This is easier if you can do it on a straight road. Or, you can scuff up the liners with some sand paper (wear a respirator if you do this) to break the glaze.
I've never had to do this with my 670 (770's little brother) or 790 (770's big brother) yet, but I have done it with cars and trucks I've owned over the years.
I'd never experienced this problem when cars had brake shoes but I have seen it occasionally with vehicles with disk brakes. Doesn't seem to happen too much anymore due to changes in the brake pad materials.

 

[Villengineer]

Thanks, glazing is what I suspected, but wasn't sure. When plowing snow and creeping up to cars, garages, and the like I do use the brakes a lot more that I do at any other time. I'll try and see if I can break the glaze to get rid of the chatter.

 

[arrabil]

I don't know how the parking brake on a 770 works but its possible you can drive for twenty or so feet with the parking brake on and clear the glaze.