Craftsman 247.796890 Chipper User Manual


 
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 usedt
CUTTING BLADE
The cutting blade may be removed for grinding or
replacement as follows
1 Lower the upper guide extension
2, Block up the housing See figure 20.
3. 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
4, Remove the back-up ptater 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
, , WeEd B ,
x.,
Blade
Blade
/
Back-Up /
Plate_. ,__ .....
FIGURE 20,
5. Hold the blade retainer on the impeller assembly
with an adjustable wrench to keep the blade from
turning as shown in figure 20
6, Remove the blade by removing the center bolt, lock
washer and fiat washer
NOTE
Use caution when removing the blade to
avoid contacting the weld bolts
protruding from the housing.
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 wil!
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
Nai, / \
°,o0eC7
FIGURE 21
When reassembling the blade, tighten to between 375
and 450 inch pounds, or lacking torque wrench, tighten
securet¥
FLAILS AND FINGERS
The flails and fingers may be _eversed when they
become dull It is suggested that this procedure be
performed by your nearest Sears Service Department
OFF-SEASON STORAGE
tf the chipper-shredder is to be inoperative for a period
longer than 30 days, the following precautions are
recommended.
I Working outdoors, drain all [uel from the fue! tank.
Run the engine until it stops from lack of fuel
DO NOT DRAIN FUEL WHILE SMOKING,
OR IF NEAR AN OPEN FIRE
2, Drain alI the oil from the crankcase (this should be
done after the engine has been operated and is still
warm) and refill crankcase with fresh oi!
3 Protect the inside of the engine for storage as
follows
Remove spark plug, pour approximately !/2 ounce
(approximately one tablespoonl of engine oil into
cylinder and crank slowly to distribute oil Replace
spark plug
4 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 tight oil
or silicone, coat the equipment, especially
all moving parts
Store in a clean, d_y area
1!