Ryobi BD4600 English Manual - Page 17

MAINTENANCE WARNING: When servicing, use only identical replacement parts. Use of any other parts may create a hazard or cause product damage. WARNING: Always wear safety goggles or safety glasses with side shields during power tool operation or when blowing dust. If operation is dusty, also wear a dust mask. 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 may result in serious personal injury. 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. n Remove the old drive belt. n Fit the new drive belt on the drive pulley first and then on the motor pulley. n Test belt tension by squeezing the belt with your fingers. n Adjust the belt tension with the hex head set screw until there is about 1/4 in. of give. n Tighten the belt tension nut securely. n Adjust the motor bracket so that it holds the motor against the hex nut. NOTE: Excessive tightness on the drive belt may cause increased noise and overload the motor. Excessive looseness on the drive belt (and improper adjustment of the motor bracket) may cause the drive belt to fail prematurely and make a severe chattering noise. n Using a phillips head screwdriver, reinstall the pulley cover and the two phillips head screws. Tighten securely. n Replace the motor cover with the four screws, washers, and rubber feet. hex head set screw SANDING BELT WARNING: To prevent accidental starting that could cause possible serious personal injury, turn off the tool, remove the switch key, and unplug the belt sander before performing any maintenance or adjustment. Electric tools used on fiberglass material, wallboard, spackling compounds, or plaster are subject to accelerated wear and possible premature failure because the fiberglass chips and grindings are highly abrasive to bearings, brushes, commutators, etc. Consequently, we do not recommended using this tool for extended work on these types of materials. However, if you do work with any of these materials, it is extremely important to clean the tool using compressed air. LUBRICATION All of the bearings in this tool are lubricated with a sufficient amount of high grade lubricant for the life of the unit under normal operating conditions. Therefore, no further lubrication is required. changing drive belt See Figure 21. n Unplug the belt/disc sander. n Using a phillips head screwdriver, remove the two screws in the center of the pulley cover and the motor cover screws. n Remove the covers. n Loosen motor cover. n Raise sanding belt to the vertical sanding position n Next, loosen the hex head set screw. Raising the motor pulley releases the belt tension. motor BRACKEt motor screw hex nut drive belt PHILLIPS HEAD SCREWS motor cover rubber feet 17 drive pulley motor pulley Fig. 21