Walker MC (20 HP) Owner's Manual

Also see for MC (20 HP): Illustrated parts manual

Contents

Walker MC (20 HP) Owner's Manual Manual pdf 43 page image

Operating Instructions39Clogging ChecklistIn case of clogging, there will be a distinct changein the sound of the blower, i.e., the blower soundwill stop. Also, the mower deck will begin to leave atrail of grass clippings. When this occurs, stop theengine, disconnect the spark plug wires, and makesure all movement has stopped before attempt-ing to unclog.DANGERNEVER place hands under the mower deckor in the GHS blower discharge chute.Use a stick or similar tool to remove anyclogged material.Normally, any clogging will first develop at the backof the mower deck in the discharge opening into theblower chute. Clogging at this point does not indi-cate a particular problem in this part of the sys-tem, but is a symptom of something restrictingthe flow of material throughout the entire system.The following list of items should be checked if apattern of clogging begins to develop. All of theseitems are capable of causing clogging at the back ofthe deck.• Check to see if the RH and LH mower blades areinstalled for the correct rotation - install blades sothe cutting edges move toward each other.FORWARDBlades Must Operate atRight Angles (90 Degrees)Mounting NutTorque = 60 ft-lb(81.3 N·m)Rear DischargeChuteBlade Rotation for GHS Mower Deck(View from Underneath)• Check the amount of flat section remaining atblade tip. This is the area that is ground away (re-moved) when the blades are sharpened. If too muchof the flat section is removed, the “air lift” perfor-mance or “shovel” effect of the blade deteriorates tothe point that discharge of grass clippings into theblower chute is marginal. Replace cutter blades ifless than 3/4 in. (19 mm) flat section remains at theblade tip.• Check that the interior of the deck housing andbaffling is reasonably clean and free of grass anddirt buildup. While some degree of material buildupcan be tolerated, a point is finally reached where theflow of air and grass clippings is restricted.NOTE: One condition that quickly causes a buildupof material in the deck housing is mowing grass and/or weeds which are “juicy.” The material collectsunder the deck with sticky, green juice. Clover andweeds are especially a problem. The mower deckwill need to be cleaned frequently when operating inthese conditions.• Check the deck cutting height setting. Whenworking in thick, tall grass, lower deck settings[1 to 2 in. (25 to 51 mm) cutting heights] tend torestrict airflow from moving into and under the deck.Raising the deck cutting height will significantlyincrease airflow and reduce clogging when workingin thick, tall grass.• Check the interior of the chute connecting themower deck to the blower for smoothness andfreedom from obstruction.• Check the blower wheel for bent blades andexcessive clearance between the blade tip andthe blower housing. A clearance greater than1/8 in. (3 mm) will cause a significant loss ofblower performance.• Check the blower discharge chute into the grasscatcher for smoothness and freedom from ob-struction.• Check the elbow inside the grass catcher for abuildup of material in the radius of the elbow. Incertain conditions (damp/dirty grass) a considerable“clump” of material can accumulate at this point,greatly restricting material and airflow.• Check that the openings in the removable airexhaust screen in the grass catcher are notplugged. If the screen is clogged, refer to Cleaningthe GHS Exhaust Screen in this section.