Safety & Operating Instructions

Hopper
Assembly
Figure 27
Figure 28
Figure 29
Spacer
Bolts and
Lock Washers
3.
3. If the Knife has visible nicks or damage it must be sharpened or
replaced (see “Removing and Replacing the Chipper Knife” in this chapter).
4. If the Knife does not appear to have any damage, replace the Access
Cover and secure with nuts using a 7/16" wrench.
INSPECTING THE CHIPPER KNIFE AND WEAR PLATE
The hopper should be supported when the mounting hardware is removed.
Removal of the hopper is difficult for one person. Two people are needed for
the hopper removal process.
Tools Needed:
 1/2" Wrench
1. Using a 1/2" Wrench, loosen the two rear Bolts so they are not
threaded into the Hopper Assembly. The Bolts, Lock Washers, and
Spacer may remain loosely in place (Figure 27).
2. Remove the two Locknuts and Washers at the front side of the
Hopper (Figure 28).
3. Remove the Hopper Assembly.
4. Use a long stick to rotate the Flywheel until the Knife is next to the
Wear Plate (Figure 29).
5. Closely inspect the Chipper Knife and Wear Plate for nicks or dull
(rounded) edges.
6. If necessary, sharpen or replace the Chipper Knife and/or Wear Plate per the
procedures in the next section.
7. Reinstall the Hopper Assembly when finished.
Removing and Replacing the Chipper Knife
Tools and Supplies Needed:
 7/16" Wrench
 3/16” Allen wrench
 Ratchet with 1/2" Socket
 Awl or Sharp Tool
 Gloves
Be careful and wear gloves when working near the chipper knife. The knife
edge can cut you if you come in contact with it.
Figure 30
1. Remove the Hopper Assembly as described in the previous section
“INSPECTING THE CHIPPER KNIFE AND WEAR PLATE”.
2. Remove the Belt Guard (see “Removing and Replacing the Drive Belt” in
this Chapter to remove the Belt Guard).
3. Loosen the Locknuts that secure the rear Access Cover with a 7/16" wrench
then slide the Cover over and lift it over the Locknuts (Figure 30).
22 MacKissic Gravity Self Feeding Chipper
Hopper
Assembly
Spacer
Bolts and
Lock Washers
Locknuts
and Washers
Chipper Knife
Wear Plate
Locknuts
Wear
Plate