Operating instructions

21
TROUBLESHOOTING & REPAIR
REPAIR
Shredding Hammers
Your chipper/shredder requires routine maintenance for
long-life and trouble-free operation. See the engine
service manual shipped with your chipper/shredder for
specific recommendations and service procedures. In
general, however, your engine requires only the
preventive maintenance on the Normal Care Schedule.
The cutting edges of the shredding hammers may
eventually wear out, requiring rotation of the hammers,
or complete replacement if all cutting edges have been
used.
Triangular hammers can be rotated five times after the
first edge dulls, then flipped over once and rotated again
for a total of six cutting edges. J hammers can be
flipped over once (Beaver Express 6hp only), for a total
of two cutting edges. Shredding hammers need to be
rotated when shredding performance becomes sluggish,
or when the edges of the hammers wear down, as
shown in Figure 11 and Figure 12.
To inspect and service the shredding hammers, follow
these steps:
1. Turn engine off, allow rotor to stop completely, remove
the key, disconnect the battery, and disconnect and
secure spark plug wire.
2. Detach the shredder hopper from the rotor housing,
leaving the liner and handle in place on the hopper.
See Figure 10.
3. Remove the rotor housing by unscrewing the 5/16–18
hex nuts that hold it to the fan housing. See Figure
13.
Figure 11. J Hammer Wear Area
Figure 10. Removing Shredder Hopper Figure 13. Removing Rotor Housing
Figure 12. Triangular Hammer Wear Area