Craftsman 305cc Owners Manual - Page 15

Hairpin Clips, Clevis Pins _Hex Nuts, Washers Flail Screen Chute FIGURE 18. Hand Knobs SHARPENINGORREPLACINGTHEBLADES CHIPPER BLADES • Disconnect spark plug wire and move it away from spark plug. • Remove the flail screen as instructed in previous section. • Remove the chipper chute by removing three hex nuts and washers. A 1/2" wrench is required. See figure 18. NOTE: When reassembling, the cupped washer goes on the bottom of the chipper chute with the cupped side against the chute. • Rotate the impeller assembly by hand until you locate one of the chipper blades in the chipper chute opening. Remove the blade, using a 3/16" allen wrench on the outside of the blade and 1/2" wrench on the impeller assembly (inside the housing). See figure 19. • 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 in reverse order. Make certain blades are reassembled with the sharp edge facing the direction shown in figure 18 (sharp edge is assembled toward the slotted opening in the impeller assembly). Torque bolts and nuts to 250-350 inch pounds. 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 20. • 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 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. Allen Screws Pipe Sharp Ed! FIGURE 20. Torque Wrench FIGURE 19. • 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. 15