Sears Craftsman 247.77586 - Manual (Page 16)

equal amount of grinding to prevent an
unbalanced blade.
An unbalanced blade will cause excessive
vibration when rotating at high speeds and may
cause damage to the unit. The blade can be tested
for balance by balancing it on a round shaft
screwdriver or nail. Remove metal from the heavy
side until it is balanced evenly. See figure 20.
When reassembling the blade, tighten center
bolt to between 550 and 650 inch-pounds and
the two outer bolts to between 250and 350 inch-
pounds, or lacking torque wrench, tighten
securely.
5. TIRES
Recommended operating tire pressure is 24 p.s.i.
(sidewall of tire may give tire manufacturers
recommended pressure). Equal tire pressure should
be maintained on both tires.
A
WARNING: Excessive pressure when seating
beads may cause tire/rim assembly to burst with
force sufficient to cause serious injury.
Prepare your chipper-shredder for storage at the end
of the season or if the unit will not be used for 30 days
or more.
1. Insert screw driver through hole
Z7 ■
2. Blade should be parallel to ground
Screw .
Driver\ Blade
Ground
Figure 20
3. 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. However, if your
engine does not operate properly due to suspected
carburetor problems, take your chipper-shredder to
your nearest SEARS service center.
4. ENGINE SPEED
The engine speed on your chipper-shredder has
been set at the factory. Do not attempt to increase
engine speed or it may result in personal injury. If you
believe the engine is running too fast or too slow, take
your chipper-shredder to the nearest SEARS service
center for repair and adjustment.
16