Safety & Operating Instructions

3-POINT HITCH Mighty Mac Gravity Self-Feeding CHIPPER
30
Troubleshooting Table (continued)
S YMPTOM
POSSIBLE CAUSE/FIX
- Belt burns.

Immediately disengage the PTO and shut off the tractor.
- Flywheel won’t turn.


Turn the Flywheel with a wooden stick to be sure it turns freely.
Check for a loose Drive Belt. See Chapter 5.

Remove any built-up debris from the Chipper Hopper Inlet and Discharge
Chute.
The machine has excessive
vibration.

Check for a dull or damaged Knife; sharpen or replace the Knife. See Chapter
5.

The Knife is not properly seated on the flywheel. Loosen the Knife mounting
screws, reset the Knife and tighten the screws. Also, check the Knife to Wear
Plate Gap. See Chapter 5.

If the machine still exhibits excessive vibration, contact us at
www.MacKissic.com or call 1-800-348-1117 for assistance.
When chipping, the log
seems to vibrate excessively
and “hammers” my hands.


The Knife is dull; sharpen or replace it. See Chapter 5.
The gap between the Knife and Wear Plate is too great; adjust the Gap. See
Chapter 5.

Check PTO RPMs; run PTO at 540 RPM when chipping.
Chipper Knife is hitting the
Wear Plate.

The gap between the Knife and the Wear Plate is set incorrectly; adjust the
Knife to Wear Plate Gap. See Chapter 5.
PTO turns but the flywheel
doesn’t rotate.


Loose Drive Belt; Replace Belt. See Chapter 5.
Remove any built-up debris from the Chipper Hopper Inlet and Discharge
Chute.