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Chipper Blade Lock Washer & Nut
\
Support
Hex Bolts &
Saddle Washers
Impeller
.... Internal
.... Hex Screw
Figure 9
NOTE: Use a 3/16" hex key (Allen) wrench on the
outside of the blade and a 1/2" box (or socket) wrench
on the inside of the impefler. See Figure 9. Hold the
Allen wrench stationary and rotate the box (or socket)
wrench to loosen the nut.
• Install a replacement blade (Part No. 742-0544)
with the hardware removed earlier.
IMPORTANT:Make certain blades are reassembled with
the sharp edge outward (toward the chipper chute).
Torque hardware to between 20 ft.-Ibs and 25 ft.-Ibs.
• To replace the other blade, rotate the impeller to
expose the second blade and repeat the steps
above.
ReplacingtheShredderBlade
,_ WARNING: The impeller's chipper blades are
sharp. Wear leather work gloves to protect
your hands.
• Stop the engine and make certain that all moving
parts have come to a complete stop.
• Remove the two flange nuts (and hex bolts) which
secure the hopper support bracket to the impeller
housing. Retain the hardware. See Figure 10.
• Pivot the shredder screen upward as instructed
under the heading Cleaning the Reduction
Chamber.
• Remove the six flange nuts which secure the
hopper inlet guide to the impeller housing. See
Figure 11.
• Carefully separate the hopper assembly from the
impeller housing and set it aside.
• Insert a piece of wood into the chute deflector
opening to stabilize the impeller and prevent it from
rotating when removing the shredder blade.
Impeller
Figure 10
Chute Deflector
Shredder
Blade
_Fl!nge
Nuts
Inlet
Guide
Weld Studs,
_Hex Bolt, Lock Washer
& Flat Washer
Figure 11
• Remove the two internal hex screws which secure
the shredder blade to the impeller. See Figure 11.
NOTE: Use a 3/16" hex key (Allen) wrench on the
outside of the shredder blade and a 1/2" box (or socket)
wrench on the inside of the shredder blade. See Figure
11. Hold the Allen wrench stationary and rotate the box
(or socket) wrench to loosen the nut.
• Remove the hex bolt, lock washer, and fiat washer
to completely free the shredder blade.
IMPORTANT: If sharpening the blade for reuse, follow
the original angle of grind as a guide. Make certain
each cutting edge receives an equal amount of grinding
to prevent an unbalanced blade. Remove metal from
the heavy side until it is balanced evenly.
IMPORTANT: When reassembling the blade, tighten
center bolt to between 45 ft.-Ibs and 60 ft.-Ibs and the
two out bolts to between 20 ft.-Ibs and 25 ft.-Ibs.
11
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