arizona98tj
Gold Member
A couple of days ago, I was grinding stumps with my Woodland Mills WG24 stump grinder. A couple of hours into the session, I heard a noise. I stopped the grinder and discovered that one of the large nuts that holds a tungsten carbide cutting tooth in place had came off although the tooth was still in the flywheel, albiet unsecured. I was quite surprised since the nuts look like a Nyloc design although it could be another brand.
The tooth's square shank fits into a matching pocket in the flywheel, about an 1/8" deep, keep it from rotating. The tooth had beaten the pocket somewhat while it was coming loose but I was able to clean it up and reseat the tooth and put a new nut on it from my spare parts box. When I first looked at the pocket, I wasn't sure I would be able to salvage it.
I checked the owner's manual and the torque specs for the nut is 160 ft. pounds. Since my metric socket set stopped at 22 mm, I used a 15/16" socket which fit perfectly. Once the new nut was tightened, I spent a few minutes to verify the other 33 nuts and found that several took a bit of torque before clicking on the 160# setting. A couple on the other edge took about a quarter turn before cinching up.
I purchased the stump grinder last fall and after a few hours of operation, I checked the nuts per the manual. The take away for me is to check these a couple of times during the summer grinding season. It's super cheap insurance to keep the grinder working properly.
Just wanted to share this with the folks here that might have a stump grinder....as a friendly reminder.
The tooth's square shank fits into a matching pocket in the flywheel, about an 1/8" deep, keep it from rotating. The tooth had beaten the pocket somewhat while it was coming loose but I was able to clean it up and reseat the tooth and put a new nut on it from my spare parts box. When I first looked at the pocket, I wasn't sure I would be able to salvage it.
I checked the owner's manual and the torque specs for the nut is 160 ft. pounds. Since my metric socket set stopped at 22 mm, I used a 15/16" socket which fit perfectly. Once the new nut was tightened, I spent a few minutes to verify the other 33 nuts and found that several took a bit of torque before clicking on the 160# setting. A couple on the other edge took about a quarter turn before cinching up.
I purchased the stump grinder last fall and after a few hours of operation, I checked the nuts per the manual. The take away for me is to check these a couple of times during the summer grinding season. It's super cheap insurance to keep the grinder working properly.
Just wanted to share this with the folks here that might have a stump grinder....as a friendly reminder.
