36 02/02
ROUTINE MAINTENANCE
Sharp knives cause less wear on the machine and
increase fuel economy. The brush chipper is
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 including:
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 (Morbark Inc. knives are recommended.)
Knives should be ground at 31°.
KNIFE GRINDING
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