Barreto 3107C - Mulcher Hammer Checking and Replacement; Anvil Inspection and Replacement

3107C OWNER’S MANUAL 2/01/23 Page 12 of 18
To replace chipper blades:
The chipper blades have two cutting edges, when the first edge has dulled the blades can be reversed and
the new cutting edge used. When both edges have dulled the blades may be sharpened or replaced.
The bolts holding the chipper blade were installed with high strength (red) threadlocker. If you cannot get
a bolt to loosen apply heat, such as from a heat gun, while applying torque to remove the bolt.
When reinstalling the chipper blade use high strength red threadlocker and torque bolts to 102 lb-ft.
NOTICE: DO NOT drop bolts or tools into the chipper disk area; it will be difficult to remove.
Blade sharpening information:
The blades should only be sharpened by a professional with a professional precision knife grinder. Both
sides of both blades must be sharpened at the same time. To keep the blades at the same weight there
must be less than 0.010” difference in the blade profile. Uneven sharpening or wear will lead to excessive
vibration while operating.
ANVIL INSPECTION AND REPLACEMENT
WARNING: The 3107C must be rendered inoperable before removing the chipper hopper. See the
MAINTENANCE PREPARATION section.
Detailed anvil inspection:
Remove the anvil gauge cover on the left side of the flywheel cover. This will allow access to the anvil.
If the anvil has two worn edges, is damaged, has chunks missing or cracks, it must be replaced.
As the anvil edge wears, as long as the anvil is not damaged, the anvil may be moved to correctly re-align
the anvil. See instructions below.
Anvil alignment / placement:
The anvil must be correctly aligned with the chipper blade for the chipper to work correctly.
Rotate the chipper disk so that a blade is next to the anvil. The anvil should be 0.060” (1.5mm) to 0.100”
(2.54mm) max away from the blade. Use the supplied anvil gauge, mounted underneath the feed chute to
measure and adjust the anvil as shown in the figure below. Some parts are hidden to better show the
procedure. Removal of the hidden parts is not necessary.