Generac Power Systems GC3000C, Owner'S Manual

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18 Owner’s Manual for Chipper/Shredder
Maintenance
Chipper Knife Sharpening
• Never attempt to sharpen the chipper knife free-
hand. Take the knife to a machine shop for proper
sharpening.
• See Figure 4-8 . The 45° cutting angle (D) must be
maintained for proper performance.
• Excessive heat generated during the sharpening
process will damage knives and weaken the metal.
• The number of times a knife can be sharpened is
determined by how much material needs to be
taken off to sharpen or to compensate for dents or
gouges.
• A new chipper knife has a 5/16 in (8 mm) measure-
ment (C) between the short side bevel edge (B)
and the knife mounting holes (A).
• The knife should never be sharpened to the extent
that more than 3/32 in (2 mm) is removed from the
original 5/16 in (8 mm) measurement.
• Once the distance between the knife mounting
hole and short side bevel edge falls below 7 /32 in
(5 mm) or if you are unable to remove dents or
gouges with these guidelines, replace the knife.
• Replace the knife if dents or gouges can not be
removed from the knife
D
C
B
C
A
010555
Figure 4-8. Knife Sharpening
Item Description
A Knife mounting hole
B Short side bevel edge
C Distance between knife mounting hole and short side bevel edge
D Cutting Angle