Safety & Operating Instructions

3-POINT HITCH Mighty Mac Gravity Self-Feeding CHIPPER
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• Your MIGHTY MAC GRAVITY SELF-FEEDING CHIPPER can process dry or green wood up to 4.75" in
diameter.
• The Chipper will self-feed the wood once it contacts the knife edge so forcing the branches into the
Hopper is not necessary if the knife is sharp.
• Green wood will process quicker and easier than dry wood.
• Softwood processes easier than hardwood.
• Your operator experience will teach you how different types of wood will chip and how fast you can process them.
• When chipping branches, sometimes a tail will develop at the end of a branch. To avoid this, rotate the
branch while feeding it into the Chipper Hopper.
• Rotating the branch as you feed it into the machine will improve chipping performance.
• Use caution with small diameter green saplings and branches less than 2" in diameter. Chip these grouped or
bundled together to provide support for each other. If the material is 2" or larger, feed only one at a time into the
Chipper Hopper.
• Make sure the MIGHTY MAC GRAVITY SELF-FEEDING CHIPPER finishes processing material in the Hopper
before disengaging the PTO and shutting the Tractor engine off.
• Do not force material into the Chipper. If the machine does not chip well, the Chipper Knife may need
sharpening or replacement, or the gap between the Knife and the Wear Plate needs adjusting. See
“Removing, Replacing and Adjusting the Chipper Knife and Wear Plate” in Chapter 5.
• Extremely hard knots will not process very well. Push any short stubs that have not self-fed through the
Chipper, with the next branch to be chipped.
• Cut the material to be chipped into manageable lengths of no more than five or six feet long before chipping
them.
• Overloading the Chipper Hopper will cause the rotor speed to decrease. If you hear the engine RPM
decreasing, stop feeding material into the Chipper Hopper until the engine has returned to full speed.
Never throw remaining stubs or knots into the chipper hopper; damage will result.