Sears 247.79963 - Manual (Page 16)

A
WARNING: MAKE SURE TO WEAR
HEAVY DUTY GLOVES FOR THI 5 JOB.
WHILE ACCESSING THE CHIPPER
BLADE, YOU MAY HAVE TO CLE> l N THE
SCREW HEAD OF DUST AND
SHREDDED PARTICLES TO ENABLE
THE ALLEN WRENCH TO OPERATE.
HANDLE THE WRENCH CAREFULLY SO
THAT YOU DO NOT CUT YOUR HAND
ON THE CHIPPER BLADE.
• Locate one of the chipper blades in the access
plate opening by rotating the impeller asse nbly by
hand. Remove the blade using a 3/16“ alien
wrench on the outside of the blade and 1/2" wrench
on the impeller assembly, inside the hDusing.
Torque hardware to 250-350 inch pounds.
• Remove the other blade in the same manner.
Replace or sharpen blades. If sharpeninn, make
certain to remove an equal amount fron each
blade. Reassemble in reverse order.
NOTE: Make sure that the blades are reasi embled
with the sharp edge facing upward, as viewed from
the access plate opening.
CHANGING THE FRICTION WHEEL RUBBEIt
The rubber on the friction wheel is subject to wear
and should be checked after 50 hours of operation,
and periodically thereafter. Replace frictio i wheel
rubber if any signs of wear or cracking are fou id.
• Drain the gasoline and oil from the chipper-
vacuum.
• Tip the unit backward so it rests on the han lies.
• Remove the frame cover by removing ei jht seif­
tapping screws from underneath the chipper-
vacuum. See figure 23.
Remove the gear shaft from the unit by removing
the hex bolts, lock washers and flat washers from
each side of the frame. See figure 24. Hold the fric­
tion wheel assembly, and slide the gear shaft out of
the unit toward the right side.
• Remove the six screws from the friction wheel
assembly (three from each side). Remove the fric­
tion wheel rubber from between the friction wheel
plate.
• Reassemble new friction wheel rubber to the fric­
tion wheel assembly, tightening the six screws in
rotation and with equal force.
• Slide the friction wheel assembly up onto the shift
mechanism, then slide the gear shaft back into the
unit. Reassemble in reverse order.
• Readjust the clutch cable. Refer to adjustment sec­
tion.
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