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Anleitung Zusammenfassung
See Figure 14. Spark plug replacement is recommended at the start of each season. Refer to engine parts list for correct spark plug type. NOTE: Do not sandblast spark plug. Spark plug should be cleaned by scraping or wire brushing and washing with a commercial solvent. Figure 14 Muffler WARNING: Do not operate the lawn mower without a muffler, or tamper with the exhaust system. Damaged mufflers or spark arresters could create a fire hazard. Temperature of muffler and nearby areas may exceed 150o F(65oC). Feeler gap .030” Spark Plug MAINTENANCE 14 Blade Care Periodically inspect the blade adapter for cracks, especially if you strike a foreign object. Replace when necessary. WARNING: When inspecting the cutting blade, protect hands by using heavy gloves or a rag to grasp the cutting blade. • Disconnect spark plug wire from spark plug. • Turn mower on its side making sure that the air filter and the carburetor are up to check the blade. If the blade needs to be serviced, refer to the instructions on blade care in the “Service & Adjustments” section of this manual. Lubrication Wheels • Lubricate the wheels at least once a season with light oil or engine oil. Also, if the wheels are removed for any reason, lubricate the surface of the axle bolt and the inner surface of the wheel with light oil. Blade Control Handle • Lubricate the pivot points on the blade control handle and the brake cable at least once a season with light oil. The blade control handle must operate freely in both directions. For complete lubrication chart, see Figure 15. Chute Deflector • Lubricate the torsion spring and the pivot point on each end of the chute deflector using a light oil. This will prevent rusting and ensure that the deflector, which is a safety device, can always work properly. Figure 15 Lubricate NOTE: For sake of clarity, illustrations in the insets represent view from another perspective rather than from the operating position. Lubricate Lubricate Figure 15: Lubrication Chart SERVICE & ADJUSTMENTS SERVICE & ADJUSTMENTS Servicing Blade To Remove Blade • Remove the bolt and blade bell support which hold the blade and adapter to the engine crankshaft. See Figure 16. • Remove the blade and adapter from the crankshaft. To Replace Blade: • Before reinstalling the blade and the blade adapter to the unit, lubricate the engine crankshaft and the inner surface of the blade adapter with light oil. • Install the blade adapter on the crankshaft with the “star” away from the engine. See Figure 16. Blade Adapter Blade Bell Support Hex Bolt Blade Crankshaft Figure 16 • Place the new blade with the side marked bottom (or with part number) facing away from the adapter. • Place the bell support next. Make sure to align the tabs in the holes of the blade with the hole in the bell support. • Insert the hex bolt through the blade assembly. Figure 16 shows the correct order of assembly. • Use block of wood to hold blade again while you tighten the bolt clockwise. Follow the recommended torque for the bolt which is 450600 in.-lbs. IMPORTANT: The bolt, used to secure the blade to the engine, is specially heat-treated. Do not substitute. To order replacement bolt, refer to the Repair Parts section of this manual. WARNING: To ensure safe operation of your unit, all nuts and bolts must be checked periodically for correct tightness. To Sharpen Blade: The blade can be sharpened with a file or on a grinding wheel. Do not attempt to sharpen while on the mower. • Follow the original angle of grind as a guide. Make sure that each cutting edge receives an equal amount of grinding to prevent an unbalanced blade. NOTE: An unbalanced blade will cause excessive vibration when rotating at high speeds, may cause damage to the mower and could break, causing personal injury. • Test the blade by balancing it on a round shaft screwdriver or a blade balancer. See Figure 17. • If the blade is not balanced, remove metal from the heavy side until it balances evenly. 1. Insert screw driver through hole 2. Blade should be parallel to ground Screw Blade Driver Ground Figure 17 Engine Adjustments WARNING: Do not make unnecessary adjustments on the engine. Factory settings are satisfactory for most conditions. If any adjustments are made to the engine while the engine is running, keep clear of all moving parts. Be careful of heated surfaces and muffler. Keep your hands away from these parts. Carburetor The carburetor has been pre-set at the factory and should not require adjustment. • If the engine on your mower does not operate properly due to suspected carburetor problems, take your lawn mower to your nearest SEARS service center. • Engine performance may be affected in altitudes above 4000 feet. To improve engine performance, install a high altitude adjustment kit, available at the SEARS service center. NOTE: A dirty air cleaner will cause an engine to run rough. Be certain air cleaner is clean and attached to the carburetor. ADJUSTMENTS 15 Engine Speed WARNING: Overspeedi...