Walker MDD (20.9 HP) Owner's Manual

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Contents

Operating Instructions40General InformationThe Grass Handling System (GHS) consists of arear discharge mower deck connected to a 10 in. (25cm) blower and a rear mounted grass catcher with7.0 bushel (246 liters) capacity or optional 9.5bushel (335 liters) capacity. The GHS blower oper-ates any time the mower blade clutch is engagedand moves grass through the rear discharge deckchute into the grass catcher. Blower airflow is ex-hausted out the back of the grass catcher, through afiltering screen. When the grass catcher is full andneeds to be emptied, a “full” signal horn alerts theoperator. When the “full” signal horn sounds, it isimportant to stop mowing to prevent overfilling andclogging of the blower system.IMPORTANT: Normally, the GHS blower operateswith no maintenance or cleaning required. However,under certain operating conditions, the inside of theblower housing may accumulate a deposit of dirt,causing wear and binding of the blower wheel.Normally, dirt buildup occurs when mowing a com-bination of dirty and damp grass, especially inthe springtime. When operating in these condi-tions, check the blower wheel frequently forbinding and clean the blower housing as required.Refer to CLEANING the GHS Blower in Mainte-nance Instructions.NOTE: In Autumn, when using the GHS mower tovacuum leaves, it is recommended to raise the frontof the mower deck 2 to 3 notches [1 to 1-1/2 in. (25to 38 mm)] higher than the rear. This will avoid“bulldozing” leaves, particularly when the leavesare piled in a thick layer. To make this adjustment,the hitch pins in the two (2) front deck support pinsare repositioned 2 to 3 notches higher while leavingthe rear pins in their original position.NOTE: When a side discharge or mulching mow-er deck is installed on the GHS model, a blowerintake cover should be installed in the blower intaketube. This cover “unloads” the blower and sealsthe intake to effectively eliminate power loss andblower noise when the blower is not being used.Blower Intake CoverDANGERNEVER operate the GHS catcher with theback door open. Objects may be thrownout the back of the catcher with sufficientforce to cause serious injury to bystand-ers or property damage.DANGERROTATING BLOWER BLADESNEVER operate the GHS blower with theblower discharge chute uncovered (grasscatcher in the dump position) since dan-gerous projectiles may be thrown. NEVERput hands into the blower discharge chutefor any reason. Use a stick or similar in-strument to remove any material if clog-ging has occurred.CAUTIONNEVER leave grass clippings in the grasscatcher after mowing. Damp clippingsgenerate heat as they decompose. ThisMAY cause spontaneous combustion.BlowerIntake Cover