*REFER TO CHECK SHEET FIRST
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SAFETY MAINTENANCE
Sharp knives cause less wear on the machine and
increase fuel economy. Morbark Brush Chippers
are equipped with double edged chipper knives.
When one cutting surface of the knife becomes dull,
simply rotate the knives.
The time between knife sharpening will depend on
many factors, such as:
a. Species of wood.
b. Weather conditions: rain causes the trees to pick
up soil while being dragged to the chipping site
Soil is extremely hard on knives.
c. Amount of chipper production.
d. The quality of the knife. Knives should be sharp-
ened professionally with a coolant type surface
grinder (Sharp Edge, Inc. knives are recom-
mended.)
Knives should be ground at 31 degrees.
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