Maintenance - Ryobi BD4600 Operator's Manual

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, petroleum-
based 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.
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, commuta-
tors, 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 lubrica-
tion is required.
CHANGING dRIVE BELT
See Figure 21.
 Unplug the belt/disc sander.
 Using a phillips head screwdriver, remove the two screws in
the center of the pulley cover and the motor cover screws.
 Remove the covers.
 Loosen motor cover.
 Raise sanding belt to the vertical sanding position
 Next, loosen the hex head set screw. Raising the motor
pulley releases the belt tension.

MAINTENANCE

 Remove the old drive belt.
 Fit the new drive belt on the drive pulley first and then
on the motor pulley.
 Test belt tension by squeezing the belt with your
fingers.
 Adjust the belt tension with the hex head set screw until
there is about 1/4 in. of give.
 Tighten the belt tension nut securely.
 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.
 Using a phillips head screwdriver, reinstall the pulley cover
and the two phillips head screws. Tighten securely.
 Replace the motor cover with the four screws, washers,
and rubber feet.
Motor
BrACKet
SCreW
PHilliPS
HeAd SCreWS
17
HeX HeAd
Set SCreW
Motor
HeX nut
driVe
Belt
Motor CoVer
ruBBer Feet
SAndinG
Belt
driVe
PulleY
Motor
PulleY
Fig. 1