Walker MB (18 HP) Owner's Manual

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Contents

Walker MB (18 HP) Owner's Manual Manual pdf 46 page image

Maintenance Instructions CHECKING/SERVICING44Check the battery charge by measuring the specificgravity of electrolyte; if specific gravity is less than1.225, the battery will need to be charged as follows:• Charge the battery at 15 amps for 10 minutes.DO NOT exceed 20 amps maximum recommendedcharging rate. Charge until specific gravity is atleast 1.250. Total charging time should not exceedone (1) hour.Tire PressureInflate tires to pressures shown below:Deck Caster Wheel = 20 PSI (137 kPa)Drive = 15 PSI (103 kPa)Rear = 20 PSI (137 kPa)Sharpen Mower BladesCheck mower blade(s) for straightness, sharp-ness, condition of the cutting edge, and balanceevery 10 hours of operation (or more often whenmowing abrasive type grass or operating on sandysoils). Replace blades if worn, bent, cracked, orotherwise damaged (refer to REPLACING/REPAIRING the Mower Blades in this section).Use the following procedure to check and sharpenblades:NOTE: Keep blades sharp - cutting with dullblades not only yields a poor mowing job but slowsthe cutting speed of the mower and causes extrawear on the engine and blade drive by pulling hard.1. Stop the engine, remove ignition key, and dis-connect the spark plug wires before raising themower deck to service blades.2. Raise the deck and secure it in the tilt-up posi-tion (refer to Deck Secured in Tilt-Up Positionphoto in CLEANING of Grass Buildup inMower Housing in this section).3. Check the blades for straightness by markingthe blade tip position inside the deck housing,and then rotating the opposite end of the bladeto the same position and comparing. If the dif-ference in blade tip track is more than 1/8 in.(3 mm), the blade is bent and should be re-placed.4. If the blade cutting edge is dull or nicked, itshould be sharpened. Remove blades forsharpening by grasping the end of the bladeusing a rag or a thick, padded glove, while loos-ening and removing the nut, lock washer, andflat washer that mounts the blade.5. Grind cutting edge at the same bevel as theoriginal. Sharpen only the top of the cuttingedge to maintain sharpness.NOTE: Blades can be sharpened with an elec-tric blade sharpener, conventional electricgrinder, or a hand file.6. Check blade balance by positioning the bladehorizontally on a blade balancer or use a nail orshaft through the center hole. If either end of theblade rotates downward, grind (remove) metalon that end until the blade will balance. Theblade is properly balanced when neither enddrops. Balance of a blade is generally main-tained by removing an equal amount of materialfrom each end of the blade when sharpening.DANGERNEVER operate cutter blades with thedeck in the raised position.WARNINGDO NOT try to straighten a blade that isbent. NEVER weld a broken or crackedblade. ALWAYS replace with a new bladeto assure safety.CAUTIONALWAYS wear eye protection and gloveswhen sharpening a blade.