Walker MS Operator's Manual

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Walker MS Operator's Manual Manual pdf 57 page image

Maintenance Instructions CLEANING53Engine Cooling SystemCooling Air Intake SystemTo prevent engine overheating and possible enginedamage, clean grass clippings, chaff, and dirt fromthe rotating engine cooling air intake screen afterevery 8 hours of operation. In certain mowing con-ditions (dry grass, leaves, tree “cotton”, etc.), it maybe necessary to check and clean this area severaltimes each day to prevent engine overheating.CAUTIONOperating the engine with a blocked airintake screen, dirty or plugged coolingfins, and/or cooling shrouds removed willcause engine damage from overheating.Rotating EngineCooling AirIntake ScreenKeep Rotating Engine CoolingAir Intake Screen CleanCylinder Head Cooling FinsIt is essential for performance and longevity of theair-cooled engine to keep the cylinder head coolingfins clean and free of obstruction. After every 8hours of operation, check the performance of thecooling system by starting the engine, holding ahand adjacent to the cylinder head, and feeling thecooling airflow. If there is little or no airflow, cleanthe cooling fins as follows:DANGERMake sure to keep hands clear of exhaustpipe, muffler, and moving parts whenchecking airflow.NOTE: The planned maintenance schedule callsfor cleaning the cylinder head cooling fins yearly orevery 300 hours as a minimum.Check for AirflowCooling System Airflow1. Inspect accessible cooling fins and clean withcompressed air as needed. If the buildup is ex-cessive, refer to step 2.2. Remove the spark plug wire. Remove the cyl-inder head shroud by removing the one (1) bolt,as shown in the Inspect and Clean CylinderHead Cooling Fins photo. Cover the sparkplug boot before cleaning out the cooling fins.Clean the cooling fins by blowing with com-pressed air. If the buildup is excessive, use apiece of wire to probe into the fins for cleaning.3. Reinstall the shrouds by reversing the preced-ing steps. Start the engine and confirm thecooling airflow.Cylinder Head ShroudBolt (Not Visible)Spark PlugWireCoolingFinsInspect and Clean Cylinder Head Cooling Fins(Viewed from Left Side of Tractor)