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14
PN-51210 (Rev. 7/98)
S
ERVICE
AND
M
AINTENANCE
45
⋅⋅
⋅⋅
⋅
t
s
t
t
0.38
Figure 7
Sharpening
Edges
WARNING: Shut off PTO and make sure all moving parts have come
to a complete stop before inspecting or servicing any part of the machine.
The chipping blades are sharp! Use care when working on machine to avoid
injury.
WARNING: The rotor assembly has a lock mechanism. Use the lock
mechanism at all times when working on the rotor assembly. Remove plastic
bearing cover under chipper chute. There is a hole in the rotor jack shaft and
a matching hole in the bracket mounted to the rotor bearing front side.
Install a punch through the rotor shaft and bracket to lock the rotor in place.
The chipper blades dull, making chipping difficult. It is recommended to
sharpen the chipper blades every 5-15 hours of chipper operation. To
remove the chipping blades for sharpening:
1. Remove the two 3/8" retaining bolts holding access cover to main frame
assembly.
2. Tilt access cover over to allow rotor access. Rotate the rotor so the bolts
holding a chipping blade are most accessible.
3. Remove the two allen head bolts holding the blade itself. Repeat for all
four blades. The four chipping blades have two edges per blade and can
be reversed one time each before sharpening. Remove and reverse the
chipping blades if both sides have not been used. Reinstall chipping
blades and proceed with chipping.
To grind the angled edge of the chipping blade to 45 degrees (see figure 7):
Grind the blades on a slow-speed wet grinder, if possible, or have them
Figure 8
Service and Maintenance
Sharpening Chipper Blades