Ryobi P21100 Operation Manual - Page 14

MAINTENANCE GENERAL MAINTENANCE Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, dust, oil, grease, etc. WARNING: Do not at any time let brake fluids, gasoline, petroleumbased products, penetrating oils, etc., come in contact with plastic parts. Chemicals can damage, weaken, or destroy plastic which can result in serious personal injury. Remove any build-up of grass and leaves on or around the motor cover. Wipe the mower clean with a dry cloth occasionally. Do not use water. LUBRICATION All of the bearings in this product are lubricated with a sufficient amount of high grade lubricant for the life of the unit under normal operating conditions. Therefore, no further bearing lubrication is required. WARNING: Always protect hands by wearing heavy gloves and/or wrapping the cutting edges of the blade with rags and other material when performing blade maintenance. Contact with the blade could result in serious personal injury. REPLACING THE CUTTING BLADE See Figures 13 - 14. NOTE: Only use authorized replacement blades.  Stop the motor and remove the start key. Allow blade to come to a complete stop.  Remove start key and battery packs.  Turn the mower on its side.  Wedge a block of wood between the blade and mower deck to prevent the blade from turning.  Loosen the blade nut by turning it counterclockwise (as viewed from bottom of mower) using a 15 mm wrench or socket (not provided).  Remove the blade nut, spacer, blade insulator, and blade.  Place the new blade on the shaft against the fan assembly. Ensure blade is properly seated with shaft going through center blade hole and the two blade posts inserted into their respective holes on the blade. Make sure it is installed with the curved ends pointing up toward the mower deck and not down toward the ground. When seated properly, the blade should be flat against the fan assembly.  Replace the blade insulator and spacer, then thread the blade nut on the shaft and finger tighten. NOTE: Make certain all parts are replaced in the exact order in which they were removed.  Torque the blade nut down clockwise using a torque wrench (not provided) to ensure the bolt is properly tightened. The recommended torque for the blade nut is 350-400 in. lbs. WARNING: Ensure blade is properly seated and the blade nut is tightened to the torque specifications above. Failure to peroperly attach the blade could cause it to come loose and result in possible serious personal injury. STORING THE MOWER See Figure 15.  Remove the batteries and start key and store in a secure location out of the reach of children.  Before storage, wipe any dirt or debris from the battery area.  Turn mower on its side and clean grass clippings that have accumulated on the underside of the mower deck.  Wipe the mower clean with a dry cloth.  Check all nuts, bolts, knobs, screws, fasteners, etc., for tightness.  Inspect moving parts for damage, breakage, and wear. Have repairs made on any damaged or missing parts. Check blade for damage, uneven, or excessive wear and replace blade if these conditions exist.  Lower the handle assembly as described earlier in this manual.  Store mower indoors in a clean, dry place out of the reach of children.  Do not store near corrosive materials such as fertilizer or rock salt. 10 - English