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11
3. Using a 1/2” wrench, remove the chipper chute
by removing three hex nuts and washers.
Model 465A only
4. Use a 7/16” wrench, to remove the brace
holding the chipper chute to the frame by
removing the hex bolts.
All models
5. Rotate the impeller assembly by hand until you
locate one of the two chipper blades in the
chipper chute opening. Remove the blade,
using a 3/16" allen wrench on the outside of the
blade and 1/2" wrench on the impeller assembly
(inside the housing).
Figure 8
6. Remove the other blade in the same manner.
7. Replace or sharpen blades.
8. If sharpening, make certain to remove an equal
amount from each blade.
9. Reassemble in reverse order. Make certain
blades are reassembled with the sharp edge
facing the direction shown in Figure 8 (sharp
edge is assembled toward the slotted opening
at the bottom).
10. Torque bolts and nuts to 250-350 inch-pounds.
SHARPENING OR REPLACING THE
SHREDDER BLADE
The shredder blade may be removed for sharpening
or replacement as follows. See Figure 9
1. Disconnect spark plug wire and move it away
from spark plug.
2. Lower the hopper assembly. Block up the
housing.
Figure 9
3. Remove the six hex lock nuts and lock washers
from the housing weld bolts using a 1/2"
wrench. Separate the chipper-shredder into two
halves.
4. Remove the support plate.
NOTE: When reassembling, make certain the
embossed tab faces inward towards the impeller,
and opening on the support plate is toward the
bottom of the unit.
5. Remove the two hand knobs and cupped
washers which secure the discharge chute.
Raise the discharge chute.
6. Insert a 1/2" or 3/4" diameter pipe through the
flail screen into the impeller to keep it from
turning, or remove the flail screen and insert a
piece of wood (2 x 4) into the chute opening.
7. Remove the two outside screws on the blade,
using a 3/16" allen wrench and a 1/2" wrench.
8. Remove the blade by removing the center bolt,
lock washer and flat washer.
WARNING: Use caution when removing
the blade to avoid contacting the weld
bolts on the housing.
9. When sharpening the blade, follow the original
angle of grind as a guide. It is extremely
important that each cutting edge receives an
equal amount of grinding to prevent an
unbalanced blade.
10. An unbalanced blade will cause excessive
vibration when rotating at high speeds and may
cause damage to the unit. The blade can be
tested for balance by balancing it on a round shaft
screwdriver or nail. Remove metal from the heavy
side until it is balanced evenly. See Figure 10
Slot
Blade
Pipe
Torque Wrench
Weld Bolt
Blade
Allen Screws