Maintenance
Chipping Knives Sharpening and Replacement
The chipping knives should be sharpened or replaced when
tree limbs require extra force to feed into the chipper inlet.
The chipping knives may be sharpened at a 35 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 10.
Removing/Replacing Chipper Blades
1. Turn engine off and wait for all parts to stop.
2. Disconnect spark plug wire (not shown).
3. Remove (4) M10 Bolts that attach Hopper Assembly. Lift
Hopper Assembly from Chipper/Shredder and set aside
(see Figure 11).
4. Tilt Chipper/Shredder forward and rest on drawbar.
5. Remove (11) M8 Nylock Nuts that attach Shredder
Housing to Chipper Shredder. Remove Wheel/Bracket
Assembly Shredder Housing and Shredder Interface Plate.
6. Rotate Flywheel to align Blade Attachment Bolts with
access holes. Remove (2) M8 Bolts, Flat Washers and
Split Lock Washers for each of the Chipper Blades. Reach
through the Chipper Inlet Tube to remove the Chipper
Blade. (See figure 12). Alternatively, the tube may be
removed for easier access.
7. Reassemble in reverse order. Tighten M8 hardware to 25
N-m (18 ft-lb) and M10 hardware to 50 N-m (36 ft-lb).
Figure 11
LOCK
WASHER
SOCKET HEAD
CAP SCREW
CHIPPER
BLADE
19
Figure 12
TOP VIEW
SIDE VIEW
35°
CHIPPER KNIFE CUTTING EDGE
1/16”
Min.
SHREDDER
INTERFACE
PLATE
SHREDDER
HOUSING
HOPPER
ASSEMBLY
M8 NYLOCK
NUTS
11 Plcs
ACCESS
HOLES
WHEEL
BRACKET
ASSEMBLY
Order replacement blade Part # 106844
from Dirty Hand Tools.
