Walker MB (18 HP) Owner's Manual

Also see for MB: Parts and owners manual Detailed instructions

Contents

Walker MB (18 HP) Owner's Manual Manual pdf 43 page image

Maintenance Instructions CLEANING41CLEANINGEngine Air Cooling SystemTo prevent engine overheating and possible enginedamage, clean grass clippings, chaff and dirt fromthe rotating engine air intake screen every 8 hours ofoperation. In certain mowing conditions (dry grass,leaves, tree "cotton", etc.) it may be necessary tocheck and clean this area several times each day toprevent engine overheating. Also, visually checkinside cylinder head shroud and between cylinderhead fins for material packed in this area whichwould prevent cooling airflow; remove shroud andclean as required.IMPORTANT: Yearly or every 100 hours, removeengine cooling shroud and clean cylinder head cool-ing fins to prevent overheating. Make sure coolingshroud is reinstalled properly.Keep Engine Screen CleanClean Cooling Fins and FanAir Cleaner SystemThe engine is equipped with a paper air cleaner ele-ment with an oiled foam pre-cleaner whichsurrounds the paper element. Clean and re-oil thefoam pre-cleaner every 25 hours; more often industy/dirty conditions. Clean the paper elementevery 100 hours and replace yearly (or when dirty ordamaged). Service the air filter as follows:• Remove air cleaner cover and remove foam pre-cleaner by sliding it off the paper element.• Wash foam pre-cleaner in liquid detergent andwarm water.• Wrap foam pre-cleaner in cloth and squeeze dry(do not wring).• Saturate foam in clean engine oil. Squeezefoam to distribute and remove excess oil.• Remove the paper filter element by pulling it outof the air cleaner body.• Clean the filter element using low pressure com-pressed air [less than 100 PSI (689 kPa)]. Blow outthe filter from the interior of the element while turningthe element.NOTE: Washing the element in water or cleaningsolution is not recommended. Replace the elementif it does not clean up with compressed air.CAUTIONOperating the engine with a blocked air in-take screen, dirty or plugged cooling fins,and/or cooling shrouds removed willcause engine damage from overheating.Rotating Engine ScreenClean these areasof dirt and debris