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Service one hammer assembly at a time. Use a ball peen hammer and pin punch to remove the roll pins from each spacer and shaft as shown. (Discard the roll pins. Use new pins during reassembly.) Pull the shaft out of the rotor, catching the spacers and hammers with your free hand. Inspect the shafts and spacers for unusual wear. Replace them, if nec- essary.
Reverse each worn hammer, or replace them as need be. Note how the
If not servicing the knives, reassemble your unit by following 1 through 6 in reverse order.
8
With the chipper cone and base removed, slowly turn the rotor clock- wise with a probe until a chipper knife appears in the hole. First, scrape out any pulp embedded in the heads of the screws. Loosen the screws using the 3/16” Allen wrench provided with your unit. Unscrew them by hand and remove the knife. Rotate the rotor slowly and remove the second knife in this same way.
Sharpen the knives evenly at 30° angles. A homeowner’s bench grinder with a fine grit stone will do, but because the knives are specially treated, too much heat will make them brittle. Grind only a little bit at a time and allow them to cool.
Knives must be replaced once the bases of their cutting edges are ground within 1/8” of the mounting holes.
Single hammer, fork facing out.
SHOWN HERE: Removing a knife without disassembling the housings.
page 15
Single hammer, fork facing in.
CORRECT “STAGGERING”
OF HAMMERS
Sharpen the
chipping knives
when they lose their self-feeding action.
Minimum
Reassemble your
