Walker MT Owner's Manual

Contents

Maintenance Instructions CLEANING57Air Filter ReinstallationEngine Cooling SystemAir Intake SystemTo prevent engine overheating and possible enginedamage, clean grass clippings, chaff, and dirt fromthe rotating engine air intake screen after every 8hours of operation. In certain mowing conditions(dry grass, leaves, tree “cotton”, etc.), it may be nec-essary to check and clean the screen several timeseach day to prevent engine overheating.Cylinder 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, clean thecooling fins as described below.Every 100 hours, inspect and clean the cooling fins(more often when operating in extremely dusty, dirtyconditions). Remove the two (2) cooling fin accesspanels in the engine shroud and clean the coolingfins and external surfaces using compressed air.Make sure to reinstall the access panels before op-erating the engine.NOTE: Some Kohler engines have not beenequipped with the cooling fin access panels. Kohlerkit #25-755-21 installs the panels if they are missing.Engine Air Intake Screenand Cooling Fin Access PanelsCooling System AirflowCAUTIONOperating the engine with a blocked airintake screen, dirty or plugged coolingfins, and/or cooling shrouds removed willcause engine damage from overheating.Paper Element Gasket -Lightly Grease toImprove Sealing ActionAir Cleaner Base Plate(Check Sealing Surface)RubberSealDANGERMake sure to keep hands clear of exhaustpipe, muffler, and moving parts whenchecking airflow.Engine AirIntake ScreenKohler EngineShroudEngine CoolingFin Access PanelsCylinderHeadCheck Airflowwith Hand