Ryobi BS903 - Manual (Page 22)

22
MAINTENANCE
ADJUSTMENTS
To Adjust Blade Guide Bearings:
The blade guide bearings help keep the blade from twisting
and binding. The blade can be ruined if the blade teeth hit
the bearings while using the band saw.

Remove the blade guard by loosening the two phillips
screws.
 Using a 2.5 mm hex key, loosen the two blade guide
screws that lock the upper blade guide bearings. Slide the
blade guide bearings to within 1/64 in. (0.4 mm) behind
the gullet of the blade. Retighten the two blade guide
screws securely.
 Using a flathead screwdriver, turn the screw (centered in
the blade guide bearing) until the bearing is within 1/64
in. (0.4 mm) of the blade. Do not pinch the blade. Make
sure one guide is not further away from the blade than
the other.
Repeat this procedure on the lower blade guide bearings
located below the saw table. Replace the blade guard if no
additional adjustments are to be made.
Fig. 22
BLADE GUIDE
SCREW
BLADE
GUIDE
BEARINGS
THRUST
BEARING
SCREW
THRUST
BEARING
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.
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, 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.
 Keep your band saw clean.
 Remove sawdust from the inside frequently.
 Do not allow pitch to accumulate on the saw table, blade
guides, or thrust bearings. Clean them with gum and pitch
remover.
 Apply a thin coat of automobile type wax to the saw
table’s top so the wood slides easily while cutting.
WARNING:
To prevent accidental starting that could cause possible
serious personal injury, turn off the saw, remove the
switch key, and unplug the saw before working on the
band saw.
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.
MOTOR/ELECTRICAL
 Frequently vacuum or blow out sawdust from the motor.
BLADE GUIDE BEARINGS
See Figure 22.
Blade guide bearings may become worn during use. Replace
blade guides as necessary.
BLADE GUARD REMOVED
FOR CLARIFICATION ONLY
UPPER BLADE
GUIDE
SUPPORT
BLADE
GUIDE
ASSEMBLY