Walker MS Operator's Manual

Also see for MS: Detailed instructions Owner's manual Illustrated parts manual Owner's manual

Operating Instructions39• 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.NOTE: An optional exhaust screen with largerholes (3/4”) is available for use when mowing in wetgrass; the screen provides less airflow restrictionand more clog resistance (use standard screen indry conditions to avoid excessive material blowingout of the catcher).Remember, anything that restricts airflow or mate-rial flow along the entire path from the mower deckto the grass catcher can cause clogging.Using the Tilt-Up DeckRefer to CLEANING of Grass Buildup in MowerDeck Housing in Maintenance Instructions.Using the GHS CatcherPowerfil ®The GHS catcher has an oscillating grass deliveryspout (POWERFIL®) which is designed to spreadgrass clippings throughout the interior of the grasscatcher (even when mowing wet, heavy grass). Theoscillating action may be checked by turning the igni-tion switch to the ON position and moving the bladeclutch to the ENGAGED position. The spout shouldoscillate approximately 25 cycles per minute.NOTE: If the grass spout fails to oscillate, the clutchswitch should be checked for function (the switchclosure is adjustable).“Full” Signal HornThe GHS catcher has a “full” signal horn to alertthe operator to dump the catcher when it is full (toprevent overfilling and clogging). The “full” signalhorn is activated by a vane switch (Grass-Pak ®switch) mounted on the grass delivery spout. Oscil-lating action of the spout triggers the vane switch asgrass begins to fill in around the spout when thecatcher is almost full.The “full” signal function may be checked by turningthe ignition switch ON, engaging the blade clutch(engine not running), opening the catcher back door,and triggering the Grass-Pak® vane by hand as itoscillates. The horn should sound as the switch ismoved in both directions.WARNINGDO NOT test the Grass-Pak ® switch withthe engine running. Projectiles may bethrown out of the grass delivery spout, andCOULD cause serious injury.The “full” signal horn is designed to operate (sound)when the grass catcher is almost full. The timingof the signal is adjustable by changing the positionof the vane on the Grass-Pak ® switch. If the signalis coming on too soon (catcher not completely full)or too late (grass clogging in catcher spout anddelivery chute), refer to ADJUSTMENTS for GHSSignal Horn Adjustment in Maintenance Instructions.NOTE: The horn signal should be adjusted tosound BEFORE the catcher is completely full togive the operator time to react and stop mowing. Anindication the horn signal is coming on too late (de-layed too much) is if grass clippings are falling out ofthe grass catcher delivery chute when the catcher isdumped.Cleaning the GHS Exhaust ScreenTo remove the grass catcher screen for cleaning,open the catcher door, push forward and pull downon the grass catcher screen knobs (on either side ofthe screen), and slide the screen out. Use a highpressure washer or water spray and brush to cleanthe screen.Keeping the catcher exhaust screen clean and openis essential to good performance of the catchingsystem. In some mowing conditions, e.g., wet anddirty, it will be necessary to clean the screen fre-quently to avoid clogging the mower deck, blower,and chutes due to airflow restriction.Grass CatcherScreenRemovalKnobsGrass Catcher Screen Removal for Cleaning