Craftsman 247.799892, 247.799891, 247.799890 Flails, Carburetoradjustment, Shredding Blade, Bl!de

Replace or sharpen blades. If sharpening, make cer- tain to remove an equal amount from each blade. Reassemble in reverse order.

Make certain blades are reassembled with the sharp edge facing the direction shown in figure 19 (sharp edge is assembled toward the slotted opening in the impeller assembly).

SHREDDING BLADE

The shredding blade may be removed for sharpening or replacement as follows.

•Disconnect spark plug wire and move it away from spark plug.

•Lower the hopper assembly. Block up the housing. See figure 15.

•Remove the six hex lock nuts and lock washers from the housing weld bolts using a 1/2" wrench. Separate the chipper-shredder into two halves.

•Remove the back-up plate.

NOTE: When reassembling, make certain the open- ing 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.

Allen

Screws

Pil

Sharp Edge

Torque

Wrench

FIGURE 15.

•Loosen the two hand knobs and cupped washers which secure the chute deflector, and raise the chute deflector.

•Insert a 1/2" or 3/4" diameter pipe through the flail screen into the impeller to keep it from turning, or remove the flail screen and insert a piece of wood (2 x 4) into the chute opening.

•Remove the two outside screws on the blade, using a 3/16" allen wrench and a 1/2" wrench.

•Remove the blade by removing the center bolt, lock washer and flat washer.

NOTE: Use caution when removing the blade to avoid contacting the weld bolts on the housing.

•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 unbal- anced 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 16.

!

Bl!de '__

FIGURE 16.

•When reassembling the blade, tighten to between 550 and 650 inch pounds, or lacking torque wrench, tighten securely.

FLAILS

The flails, located inside the housing, may be reversed when they become dull. It is suggested that this procedure be performed by your nearest Sears Service Department.

CARBURETORADJUSTMENT

WARNING: IF ANY ADJUSTMENTS ARE MADE TO THE ENGINE WHILE THE

ENGINE IS RUNNING (E.G. CARBURE- TOR), KEEP CLEAR OF ALL MOVING PARTS. BE CAREFUL OF HEATED SUR- FACES AND MUFFLER.

Minor carburetor adjustment may be required to com-

pensate for differences in fuel, temperature, altitude or load.

NOTE: A DIRTY AIR CLEANER WILL CAUSE ENGINE TO RUN ROUGH. BE CERTAIN AIR CLEANER IS CLEAN AND ATTACHED TO THE CARBURETOR BEFORE ADJUSTING CARBURE- TOR. DO NOT MAKE UNNECESSARY ADJUST- MENTS. FACTORY SETTINGS ARE SATISFACTO- RY FOR MOST APPLICATIONS AND CONDITIONS.

Never attempt to change maximum engine speed. It is pre-set at the factory and should be changed only by a qualified service technician who has the necessary equipment.

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