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19
Replacing the Chipper Knife
The DR 9.5 Chipper Shredder is shipped with a sharp Chipper Knife and
depending upon material being chipped we've found it can remain acceptably
sharp for 40 plus hours. When you notice diminished self-feeding, it is time to
replace the knife. You may also choose to have the knife sharpened instead as
described on the next page.
NOTICE:
Electric Start Models-You will need to block underneath the electric
start model to support the machine when the Leg is removed in step 1.
Tools and Supplies needed:
1/2" Wrench
1/2" Deep Socket
3/16" Allen Wrench
Awl
Gloves
1.
Use a 1/2" Wrench to remove the nine Locknuts that secure the
Hammermill Housing/Shredder Hopper Assembly (also the Leg for Electric
Start Models) (
Figure 24
). Lift the Assembly off the machine.
2.
Use a 1/2" Wrench to remove the three Locknuts that secure the Chipper
Chute and lift it off the machine (
Figure 25
).
3.
Rotate the Flywheel until the Locknut is visible through the Locknut Access
Hole. (
Figure 26
).
4.
Clean out the heads of the Allen Screws with an awl or sharp tool (
Figure
27
).
5.
Insert a 3/16” Allen wrench into the head of the screw and a 1/2" Deep
Socket on the Locknut through the Locknut Access Hole (
Figure 26
) and
remove the Locknut and Screw.
Note:
Take care not to drop the Allen Screw or Locknut into the machine.
6.
Rotate the Hammer Mill Assembly until the outer Locknut is visible
through the Locknut Access Cutout.
7.
Repeat Steps 6 and 7 for the remaining Screw and Locknut.
8.
Remove the dull or damaged Knife and visually inspect the 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 Flywheel.
9.
Install a new or sharpened Knife and finger tighten the Allen Screws and
Locknuts.
Note:
New Allen Screws and Locknuts are provided with each new Chipper Knife.
10.
Using a 3/16" Allen Wrench on the Screw and a 1/2" Deep Socket on the
Locknut, tighten the hardware to secure the Chipper Knife.
11.
Double-check both Screws for tightness one more time.
12.
Reinstall the Chipper Hopper and Hammer Mill Housing/Shredder
Hopper Assembly (also the Leg for Electric Start Models).
Chipper
Knife
Figure 27
Allen
Screws
Flywheel
Locknut
Access
Hole
Figure 26
Flywheel
Locknut
Locknut
Access
Cutout
Chipper Chute
Figure 25
Locknuts (3)
Figure 24
Locknuts (2)
(not Shown)
Hammermill
Housing
Shredder
Hopper
Locknuts (7)
