Operator’s Manual
Chipper Shredders
22
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Chipping Knives Sharpening and Replacement
The chipping knives should be sharpened or replaced when
tree limbs require extra force to feed into the chipper cone.
The chipping knives may be sharpened at a 30 degree angle
until the distance between the edge of the blade bevel and
the mounting hole is less than 1/16” (1.6mm).
SEE FIGURE 22
To inspect, sharpen, or replace the chipping knives:
1. Turn the engine off and wait for all moving parts to stop.
2. Disconnect the spark plug wire and secure it away from
the spark plug.
3. Detach the shredder hopper from the rotor housing.
SEE FIGURE 17
(previous page)
4. Remove the rotor housing by removing the hardware
that secures it to the main housing.
SEE FIGURE 18
5. Remove the chipper cone base. Rotate the rotor such
that one of the chipper knives is visible through the cone
hole.
SEE FIGURE 20
6. Using a 1/4” hex wrench, reach into the main housing
and remove the two socket head cap screws and the
chipper knife
(SEE FIGURE 21)
. Make sure to hold onto
the chipper knife through the cone hole, be aware of the
sharp cutting edge.
SEE FIGURE 20
7. Inspect, rotate, sharpen, or replace the chipper knife.
SEE FIGURE 22
8. Reinstall the chipper knife and tighten the socket head
cap screws to 18-20 ft-lb (24-27 N.m.). We recommend
the use of high strength threadlocker on screws.
9. Rotate the rotor 180 degrees and repeat with the other
chipper knife. Reinstall the rotor cover and shredder
hopper when completed.
FIGURE 22 - Chipper Knife Minimum Cutting Edge
FIGURE 20 - Removing the Chipper Cone
WARNING
AMPUTATION HAZARD. TO AVOID SERIOUS INJURY
FROM ACCIDENTAL STARTING, ALWAYS DISCONNECT
THE SPARK PLUG WIRE AND SECURE IT AWAY FROM
THE PLUG WHEN SERVICING THE UNIT.
WARNING
CUTTING HAZARD. TO AVOID SERIOUS INJURY, AVOID
CONTACTING THE SHARP CUTTING EDGES OF THE
CHIPPING KNIVES.
FIGURE 21 - Removing the Chipper Knives
14306-0025R1
CHIPPER
CONE
BASE
CONE HOLE
CHIPPER
KNIFE
14306-0026R1
CHIPPER KNIFE
SOCKET HEAD
CAP SCREW
FLAT WASHER
TOP VIEW
SIDE VIEW
1/16”
MIN.
CHIPPER KNIFE CUTTING EDGE
30º
14306-0027R1
