Sharpening Cutting Blade Sections
Do not allow the cutting blade to wear too much before sharpening.
The cutting blade sections must be removed from the machine before sharpening.
SHARPENING STEPS
For sharpening, you will need a 6- or 8-inch bench grinder, an aluminum-oxide general-
purpose grinding wheel, a silicon-carbide green wheel and a single-point dresser.
Then follow these steps:
1. Place the aluminum-oxide wheel on one side of the bench grinder and the green wheel on
the other side.
2. Use the diamond tip of the single-point dresser to grind away about a 1/2-inch groove in
the middle-front portion of the green wheel to accommodate the front radius of carbide
tip.
3. Hold the blade vertical and inverted so that the carbide is facing up. Do not grind the
face of the carbide.
4. Use the aluminum-oxide wheel to grind away some of the steel from the front of the tip
below carbide, exposing front of carbide.
5. Do not allow carbide’s top-front cutting edge to touch the grinding wheel. That would
ruin the tip.
6. At green wheel, carefully hold the blade vertical with carbide facing up and gradually
grind away dulled portion of carbide tip, maintaining a 30-degree front cutting angle.
7. Hold blade vertical and push toward the green wheel. Do not lift the blade into the green
wheel. Depending on the blade’s dullness, you may need to go back and forth between
the aluminum oxide wheel and the green wheel until you have restored a sharp cutting
edge. As you become more familiar with sharpening, you will be able to do it quickly.
8. By keeping your stump grinder sharp, you will make customers satisfied and take a lot of
wear-and-tear off the machine.
Brake Adjustment
For fine adjustment, loosen set screw on side of brake lever knob. Adjust clockwise to tighten
brake; adjust counter clockwise to loosen brake. (Wheel should lock completely, tighten set
screw).
For coarse adjustment, turn adjusting nuts on brake cable fitting at brake cable mount.
NOTICE
SHARPENING CARBIDE
CUTTING TEETH REQUIRES A
SPECIAL PROCESS.
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