Bolens 247.77763 - Manual (Page 16)

• Locate one of the chipper blades in the access
opening by rotating the impeller 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 housing. Torque
hardware to 250/300 inch pounds.
• Remove the other blade in the same manner.
Replace or sharpen blades.
• If sharpening, make certain to remove an equal
amount from each blade.
• Reassemble following above instructions in
reverse order.
NOTE: Make sure that the blades are reassembled
with the sharp edge facing upward, as viewed from
the access plate opening.
Adjusting Carburetor
A
WARNING: If any adjustments are made to
the engine while the engine is running (e.g.
carburetor), keep clear of all moving parts.
Be careful of heated surfaces and muffler.
The carburetor has been pre-set at the factory and
should not require adjustment. If your engine does
not operate properly due to suspected carburetor
problems, take your chipper-shredder vacuum to your
nearest SEARS service center.
Engine Speed
The engine speed on your chipper-shredder vacuum
has been set at the factory. Do not attempt to
increase the engine RPM. If you think that the engine
is running too fast or too slow, take your chipper-
shredder vacuum to the nearest SEARS service
center for repair and adjustment.
A
WARNING: Do NOT attempt to alter the
engine speed by tampering with the engine’s
governor linkage. Doing so could result in
serious personal injury and damage to the
engine. The engine RPM has been set at the
factory.
Drive Clutch Cable Adjustment
Adjust the drive clutch control if you notice the
following:
a. The chipper-shredder-vacuum moves
forward with the drive clutch control
disengaged.
b. The chipper-shredder-vacuum does not
self-propel with the drive clutch control
engaged.
c. The drive belt is slipping (unit hesitates
while engine maintains the same speed).
• Use the adjustment wheel located in the clutch
control housing to tighten or loosen (slack) in the
drive cable. See Figure 22 .
• In addition, the adjustment wheel may also be
used to determine the position in which the drive
clutch control is engaged. If it is more
comfortable to have the drive engaged with the
lever further away from the handle, tighten (take
up slack) in the drive cable.
Figure 22
Replacing Transmission Drive Belt
Do not attempt to replace the transmission drive belt
on your chipper-shredder vacuum. Special tools are
required. In the event you need to have the belt
replaced, take the unit to the nearest SEARS service
center.
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