DR Power 11.5 FPT - Manual (Page 18)

18 DR ® CHIPPER/SHREDDER
Replacing the Chipper Knife
Tools and Supplies needed:

Two 1/2" Wrenches

3/16" Allen Wrench

Awl
 Gloves
1. Use two 1/2" Wrenches to remove the Shredder Hopper (Figure 21).
2. Use a 1/2" Wrench to remove the Chipper Hopper.
3. Rotate the Rotor Assembly using a stick until the three countersunk Allen
Screws attaching the Knife to the Rotor are visible through the Chipper
Hopper Opening (Figure 22).
4. Clean out the heads of the Allen Screws with an awl or sharp tool.
5. Insert a 3/16” Allen wrench into the head of a screw and a 1/2" Wrench on
the Locknut on the inside (Figure 23) and remove the Locknut and Screw.
Tip: You may want to support the Rotor by inserting a block of wood under the
knife while loosening the Locknuts and Screws (Figure 24).
6. Repeat Step 5 for the remaining two Allen Screws.
7. Remove the dull or damaged Knife and visually inspect the Chipper Rotor
Slot and Knife mounting area and be sure they are clean. Metal burrs may
need filing so that the replacement Knife will be able to mount flush against
the Chipper Rotor.
8. Install a new or sharpened Knife and finger tighten the Allen Screws and
Locknuts to hold the Knife to the Rotor.
9. Using a 3/16" Allen Wrench on the Screw and a 1/2" Wrench on the
Locknut, tighten the center Screw, then tighten the outer Screw, and finally
tighten the inner Screw.
10. Double-check all three Screws for tightness one more time.
11. Reinstall the Shredder and Chipper Hoppers.
Chipper
Knife
Figure 22
Rotor
Disc
Allen
Screws
Chipper
Knife
Figure 23
Rotor
Assembly
Locknut
Figure 21
Shredder
Hopper
Chipper
Hopper
Chipper
Hopper
Hardware
Shredder
Hopper
Hardware
Block
Knife
Figure 24