20
6 INCH CHIPPER
SERVICE & MAINTENANCE
WARNING
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE, DISENGAGE THE
HYDRAULICS, OPEN SHIELD AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
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 5.2). Use the blade angles on the
anvil spacing gauge when sharpening the blades to
achieve the proper angle (see Figure 5.3).
3. Be careful when grinding so that the blade does
not become overheated and change color. This will
remove the heat-treated properties.
1.
Install the rotor lock (Section 5.2). The rotor is now
restrained for installing the blades.
2. Place a blade on the rotor and attach using original
hardware. Torque the bolts to 120 ft-lbs. (162 Nm).
Repeat for the remaining blade.
3. Remove rotor lock.
4. Lower the access cover and secure to the chipper
housing using two 3/8" retaining bolts.
45˚
.50"
Sharpened
Surface
Mounting Surface
(DO NOT GRIND)
Mounting Surface
(DO NOT GRIND)
Sharpened
Surface
Figure 5.2, Chipper Blade Surfaces
The chipping blades should clear the chipper block
located directly under the chipper chute by 1/16 to 1/8".
To adjust the blade clearance, proceed as follows:
1. Remove the two 3/8" retaining bolts securing the
access cover to the main frame. Open access cover
to allow access to anvil. See Figure 5.4 for anvil
location.
2. Loosen the three 1/2" bolts that hold the chipper anvil
to the frame.
1. Remove the two 3/8" retaining bolts securing the
access cover to the main frame assembly.
2. Open access cover to allow access to rotor. Rotate
the rotor so that the bolts holding the chipper blades
are accessible.
3.
Install the rotor lock (Section 5.2). The rotor is now
restrained for removing the blades. To access the
remaining blades, remove pin and reposition rotor.
Return pin to the rotor lock hole.
4. Remove the two bolts that hold the blade to the
rotor. The hardware can be reused. Repeat for the
remaining blade.
5. The blades have two edges and can be reversed one
time before sharpening.
Chipping blades are sharp! Use caution when working
on machine to avoid injury.
WARNING
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 5.4).
5.5 REMOVING THE BLADES
5.6 SHARPENING THE BLADES
5.7 INSTALLING THE BLADES
5.8 SETTING CHIPPER BLADE
CLEARANCE
1/4" BLADES
1/2" BLADES
Figure 5.3, Anvil Spacing Gauge
