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15
PN-51210 (Rev. 7/98)
sharpened by a professional. Be careful when grinding if using a bench
grinder so the blade material does not get too hot and change colorthis will
remove the blade's special heat treated properties. Use short grinding times
and cool with water. Remove an equal amount off each blade to maintain
balance. Replace the chipping blades and tighten bolts to 75 ft. lbs. Close
cover and replace bolts.
Poor chipping performance is usually a result of dull chipping blades. Check
for the following symptoms if chipper performance has decreased:
Severe vibration when feeding material into the chipper.
Small diameter branches do not self-feed.
Chips discharge unevenly or have stringy tailsespecially when chipping
green branches.
Check for permanent damage before you sharpen the chipping blades.
Replace the blade if:
The blade is cracked (especially around the bolt holes) or the edges are
too deeply chipped to be ground smooth.
The base of the cutting edge is worn or has been re-sharpened so it is too
close to the rotor chipping slot.
The four-edged chipping anvil located directly under the chipper chute
should clear the chipping blade by 1/16 inch to 3/16 inch. The chipping
anvil is adjustable and reversible.
To Adjust:
1. Lift rotor access cover and expose rotor (see figure 8, page 12). Loosen
the three 1/2" bolts holding the chipper anvil to the frame.
2. Measure the amount of clearance between chipping blade and chipping
anvil from inside of housing.
3. Adjust inward or outward to desired measurement.
4. Tighten bolts on chipping anvil to 75 ft. lbs. and resume operation.
Remove the three bolts holding the anvil and use one of the other three
edges if the chipping anvil edge is damaged or worn unevenly. Adjust for
correct measurement.
S
ERVICE
AND
M
AINTENANCE
You do not have to
remove the rotor from the
main frame to repair the
chipper blades or paddles
located on the back of the
rotor assembly.
Chipping Blade Sharpening Tips
Setting Chipping Blade Clearance