Farmry Category 1, 3-Point PTO Stump Grinder Works Great, 34 Carbide Teeth, for 15-45 HP Tractors (Slip Clutch & PTO Shaft Included), SG24 Stump Grinder

The SG24 requires 15–45 PTO HP, a 540 RPM PTO, and a Category 1 3-point hitch or compatible ASABE Category 1 quick hitch. Check your tractor’s PTO output, not just its engine horsepower. Hitch compatibility alone does not confirm the complete setup: verify rear lift capacity, ballast requirements, and driveline clearance with your tractor manufacturer. If your tractor falls outside these requirements, compare other Farmry PTO stump grinders before choosing an attachment.

Yes. Check driveline length, overlap, and clearance for your tractor before first use; shaft shortening may be required. The included slip clutch also needs the manual’s running-in procedure and spring-height settings for your tractor’s PTO output. Follow the prescribed clutch checks after prolonged storage, when the friction plates can stick together. Shut off the tractor, remove the key, and wait for all moving parts to stop before inspecting or adjusting the driveline.

No. Standard SG24 operation uses straight-ahead pulling passes, so the tractor needs room to move and reposition on level ground. The operating instructions call for pulling the grinder through the stump, not swinging it from side to side. Plan clearance for the tractor and attachment around fences, buildings, and other obstacles. If you need hydraulic cutting-head positioning, compare the HSG24 hydraulic PTO stump grinder, checking that model’s separate tractor and hydraulic requirements.

Yes. It can grind hardwood stumps, but dense wood requires shallower cuts and a slower feed rate than softer wood. If the grinder bounces or sways, stop advancing and reduce the cutting depth or feed rate as directed in the manual. The rated depth of up to 6 inches below ground level is not a single-pass cutting depth. Grinding reduces stump wood to chips; it does not extract the entire root system. Keep rocks and embedded metal out of the cutting path.

Replace teeth based on wear and damage, not a fixed number of stumps. Inspect all 34 carbide teeth before each use and recheck them after two hours of operation. Secure loose hardware and replace worn or damaged teeth, maintaining the specified tooth direction and matching replacement weight to preserve cutting-wheel balance. Farmry’s SG24 replacement teeth and nuts come in an 8-piece pack, not a complete 34-tooth set.

After shutdown, remove accumulated wood chips and soil, inspect guards and fasteners, and follow the SG24 manual’s lubrication schedule for the PTO shaft and designated bearings. During heavy use, the manual recommends lubricating the PTO shaft every 8–10 hours. Keep the attachment clean and dry, preferably in sheltered indoor storage. For added protection, use the SG24 stump grinder protective cover after the machine has dried. Inspect the driveline and perform the prescribed slip-clutch checks before returning it to service.