Operating Guide

Owner’s Manual for Chipper/Shredder 19
Maintenance
Maintaining Shredder Hammers
WARNING
(000415)
Accidental start-up. Before servicing or detangling, shut
down unit, allow to cool, remove keys, and disconnect spark
plug wire(s). Failure to do so could result in death, serious
injury, or equipment damage.
When the hammer cutting edges becomes dull or
rounded, it must be rotated or reversed. The four flat
hammers have four cutting edges and the four J ham-
mers have two that may be used before replacement is
necess
ary.
To reverse the hammers:
1. Remove the hammermill housing/shredder hopper
as
sembly. See Removing and Replacing the
Chipper Knife for more information.
2. See Figure 4-9. Use a 5/32” Allen wrench and a 
3/8” wrench to remove the screw and locknut (A)
fro
m one of the short spacers (B)
3. Rem
ove hammer shaft (C), spacers (B and E), and
hammers (D and F).
4. Flip
the J hammer (D) and flat hammer (F) 180°.
NOTE: Be
sure to reinstall hammers and spacers in the
same order they were removed.
NOTE: J ha
mmer (D) must be in the outermost position.
5. Reins
tall the screw and locknut through the short
spacer and hammer pin.
6. Rep
eat steps 2 through 4 for the other three sets of
hammers.
7. V
erify that two of the j hammers are facing out and
the opposite two j hammers are facing in.
8. Rein
stall the hammermill housing/shredder hopper
assembly.
A
C
D
B
F
E
010557
Figure 4-9. Maintaining Shredder Hammers
Flywheel Maintenance
WARNING
(000415)
Accidental start-up. Before servicing or detangling, shut
down unit, allow to cool, remove keys, and disconnect spark
plug wire(s). Failure to do so could result in death, serious
injury, or equipment damage.
See Figure 4-10. Flywheel removal tool (A) is available
from Generac for easy removal of the flywheel.
A
010558
Figure 4-10. Flywheel Removal Tool