16
3 INCH CHIPPER/SHREDDER
SERVICE & MAINTENANCE
WARNING
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE,
AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
See Figure 5.2 for illustration.
1. Clean away any material that may be between the
blade and mounting surface on the rotor.
2. Place a blade (6) on the rotor and attach with two
5/16-18 x 5/8" bolts (5). Torque to 25 ft-lb. Repeat for
the second blade.
3. Reinstall the shredder screen (4) in the machine with
5/16 x 1" bolt (2) and flange nut (3).
4. Lower the discharge door/shield (1) into the normal
operating position. For CE compliant models, reinstall
the discharge assembly.
5. Remove rotor lock.
The blades can be ground on a bench grinder or by a
professional.
1. Never sharpen or grind the mounting surfaces of
the blades. This will cause the edge to roll and the
blade will be damaged, resulting in poor chipping
performance.
2. Regrind the angled edge of the chopping blades to
45 degrees (Figure 5.3). Use the blade angle gauge
plate when sharpening the blades to achieve the
proper angle (see Figure 5.4).
45°
.25
Mounting Surface
(DO NOT GRIND)
Mounting Surface
(DO NOT GRIND)
Sharpened
Surface
Sharpened
Surface
Figure 5.3, Chipper Blade Surfaces
5.5 SHARPENING THE BLADES
5.6 INSTALLING THE BLADES
Make sure the top flange of the discharge screen is
properly and completely installed into upper slot of the
housing. Failing to do so may cause knives to make
contact with discharge screen during operation.
NOTE
1
2
3
4
5
6
Figure 5.2, Blade Removal and Installation
3. Be careful when grinding so that the blade does
not become overheated and change color. This will
remove the heat-treated properties.
4. Use short grinding times and cool with water or some
type of liquid coolant.
5.
Remove an equal amount off each blade to maintain
rotor balance.
6. Small imperfections such as nicks and burrs on
the flat side of the blade will not affect the chipping
performance of the machine.
7. For blades that have been repeatedly sharpened,
ensure that the sharpened surface extends past
the chipping slot opening. If it does not extend past
the opening, the blades should be replaced (see
Section 5.3).
1/4" BLADES
1/2" BLADES
Figure 5.4, Blade Angle Gauge Plate
