Ryobi P423 Operation Manual - Page 8

ASSEMBLY  Fit the raised, small diameter portion of the clamp nut into the hole in the wheel and finger tighten.  Depress the spindle lock button and rotate the wheel clockwise until the spindle locks in position.  Tighten the clamp nut securely with the wrench provided. Do not overtighten. To remove:  Depress the spindle lock button and rotate the clamp nut until the spindle locks. NOTE: To prevent damage to the spindle or spindle lock, always allow motor to come to a complete stop before engaging spindle lock.  Loosen and remove the clamp nut from the spindle.  Remove the grinding wheel and disc flange. INSTALLING/REMOVING CUTTING WHEEL See Figure 3, page 12.  Install the wheel guard.  Place the disc flange onto the spindle. Make sure the flats on the bottom of the disc flange are engaged with the flats on the spindle.  Place the cutting wheel over the spindle. WARNING: Always install a cutting wheel with the flat side of the flange nut against the wheel. Failure to do so may cause the cutting wheel to crack when tightening the flange nut. This could result in serious in serious personal injury because of loose particles breaking off and being thrown from the tool. Do not overtighten.  Thread the clamp nut on the spindle with the raised, small diameter portion of the clamp nut facing up.  Fit the flat side of the flange nut against the outside of the wheel and finger tighten.  Depress the spindle lock button and rotate the wheel clockwise until the spindle locks in position.  Tighten the clamp nut securely with the wrench provided. Do not overtighten.  Install guard insert as described later in this section. To remove:  Depress the spindle lock button and rotate the clamp nut until the spindle locks. NOTE: To prevent damage to the spindle or spindle lock, always allow motor to come to a complete stop before engaging spindle lock.  Loosen and remove the clamp nut from the spindle.  Remove the guard insert, cutting wheel, and disc flange. ATTACHING THE GUARD INSERT See Figure 4, page 13. WARNING: Always attach the guard insert to the wheel guard when using a cutting wheel. Failure to use the guard insert could result in serious personal injury. Always install the guard insert before performing cutting operations. When attached correctly, the guard insert and wheel guard provide protection on both sides of the cutting wheel.  Install wheel guard and cutting wheel.  Place the edge of the guard insert closest to the label over the edge of the wheel guard. NOTE: The label on the guard insert should be pointing away from the cutting wheel.  Slide the guard insert over the grinding wheel and rotate it until the tab snaps into place.  To remove, pull the tab away from the wheel guard and rotate guard insert off of the wheel guard. INSTALLING THE SIDE HANDLE See Figure 5, page 13. WARNING: The side handle must always be used to help prevent loss of control and possible serious injury. The side handle can be installed on the top, left, or right side of the tool, depending on operator preference. n I nsert the side handle into the desired operating position. n Turn the side handle clockwise to securely tighten. 8 - English