Combines 8820 separator belt replacement

Had the same problem. The shields around the pulleys must be adjusted very close or the belt will run off. You will think it could not but it will. John

I have found that on some machines the drive belt idler is out of align and walks the belt over on engagement. To check - with the seat up in the cab look directly down onto the belt from above and engage the pulley. The pulley should be parallel to the belt - if not then I have successfully corrected it by removing the idler pulley and grinding the cast iron arbor bolt hole to make the pully sit parallel to the belt. Note: Do this with the idler arm up so your angle is correct on the pulley in the engaged position. Hope this helps -happy thanksgiving!

I would like to thank all of those that responded. We have replace pulleys, bearing, and the idler and yet the problem presisted. Just like you guys suggested, it turned out to be the shields around both pulleys. They had been bent from failure when the belts would jump off. We removed both shield and had them re-shaped. Then when they were re-installed, we positioned them so that the separator would operated even though it was disengaged. Then we backed off on the shields until the the separator would no longer run. It took a little time to get it right, but now it operates like new. For future problems I now where to come and that is this site. TSTAR over and out.