Évaluations - 5, GPA: 4 ( )

Fabricant : Craftsman Taille : 1.23 mb Nom Fichier : c86ddf78-47f4-4042-9604-f39763b5ce61.pdf Langue d'enseignement:

• 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 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 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 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 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 compensate 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 CARBURETOR. DO NOT MAKE UNNECESSARY ADJUSTMENTS. 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. 13 The carburetor may need re-adjusting if engine lacks power or does not idle properly. If adjustments are needed, proceed as follows. • Close needle valve (see figure 17) clockwise (F_) finger tight only. Forcing may cause damage. Then open 1-1/2 turns counterclockwise (f"). • Start engine and allow to warm for five minutes. • With throttle in FAST position, close needle valve clockwise (_) until engine starts to lose speed (lean mixture). Then slowly open needle valve counterclockwise (v-_) until engine JUST BEGINS to run unevenly. This mixture should be rich enough for best performance under load. • Place throttle control in IDLE position. If engine idles, no further adjustment is necessary. If engine idles too fast, turn idle speed adjusting screw counterclockwise (_'_) until slower speed is obtained. If engine dies, turn idle speed adjusting screw 1/4 turn clockwise (,'-_). Place throttle control in FAST position and restart engine. Move throttle control to IDLE position. If engine does not idle, repeat third step. • Test the engine by using the chipper-shredder. If engine tends to stall or die out, it usually indicates that the mixture is slightly lean and it may be necessary to open (r--_) the needle valve slightly to provide a richer mixture. This richer mixture may cause a slight unevenness in idling. Throttle Idle Speed ustin_ Throttle Needle Valve FIGURE 17. ENGINESPEED Your engine speed has been factory set. 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 adjust ment. 14 TROUBLE SHOOTING PROBLEM CORRECTIVE ACTION POSSIBLE CAUSE(S) • Fuel tank empty, or stale fuel. • Fill tank with clean, fresh fuel. Engine fails to start • Spark plug wire disconnected. • Connect wire to spark plug. • Faulty spark plug. • Clean, adjust gap or replace. Loss of power; • Spark plug wire loose. • Connect and tighten spark plug wire. operation erratic • Unit running on CHOKE. • Move choke lever to OFF position. • Blocked fuel line or stale fuel. • Clean fuel line; fill tank with clean fresh gasoline. • Disconnect fuel line at carburetor to drain fuel tank. Refill with fresh fuel. • Water or dirt in fuel system. • Carburetor out of adjustment. • Adjust carburetor or contact your SEARS Service Center. • Dirty air cleaner. • Service air cleaner. S...

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