Craftsman 247.796890 - Manual (Page 11)

LUBRICATION
Wheels ^ The wheels require no lubrication.
Flails and Fingers - if the unit is disassembled for any
reason, lubricate the flails and fingers with a light oil
(engine oil may be usedi
CUTTING BLADE
The cutting blade may be removed for grinding or
replacement as follows
1
2,
3,
4,
Lower the upper guide extension
Block up the housing. See figure 20,
Remove the four elastic lock nuts from the back
of the housing using a 1/2" wrench Refer to figure
14, Separate the shredder into two halves
Remove the back-up plate, See figure 20
NOTE
When reassembling, make certain the
opening on the back up plate is toward
the bottom of the unit The back up plate
may be reversed to provide a new cutting
edge.
6
.
Hold the blade retainer on the impeller assembly
with an adjustable wrench to keep the blade from
turning as shown in figure 20
Remove the blade by removing the center bolt, lock
washer and flat washer.
NOTÉ
Use caution when removing the blade to
avoid
contacting the weld bolts
protrudirig from the housing.
At
WARNING {
The blade is reversible and can be
assembled to the crankshaft with either
side showing
When sharpening the blade, follow the original angle
of grind as a guide It is extremely important that each
cutting edge receives an 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 by balancing it on a round shaft
screwdriver or nail Remove metal from the heavy side
until it balanced evenly See figure 21
When reassembling the blade, tighten to between 375
and 450 inch pounds, or lacking torque wrench, tighten
securely
FLAILS AND FINGERS
The flails and fingers may be reversed when they
become dull It is suggested that thts procedure be
performed by your nearest Sears Service Department
OFF-SEASON STORAGE
If the chipper-shredder is to be inoperative fora period
longer than 30 days, the following precautions are
recommended,
1, Working outdoors, drain all fuel from the fuel tank.
Run the engirte until it stops from lack of fuel
WARNING
2.
DO NOT DRAIN FUEL WHILE SMOKING,
OR IF NEAR AN OPEN FIRE
Drain all the oil from the crankcase {this should be
done after the engine has been operated and is still
warm) and refill crankcase with fresh oil
Protect the inside of the engine for storage as
follows.
Remove spark plug, pour approximately 1/2 ounce
(approximately one tablespoon) of engine oil into
cylinder and crank slowly to distribute oil. Replace
spark plug
Clean the engine and the entire chipper-shredder
thoroughly
NOTE
When storing any type of power
equipment in an unventilated or metal
storage shed, care should be taken to
rustproof the equipment. Using a light oil
or silicone, coat the equipment, especially
ail moving parts
5 Store in a clean, dry area
11