Urrea SC907A User Manual And Warranty page 24

fiberglass material, wallboard, spackling com-
pound, or plaster. During use on these materi-
als, it is extremely important that the tool is
cleaned frequently by blowing with an air jet.
WARNING: Always wear safety goggles or
safety glasses with side shields during power-
tool operations, or when blowing dust. If op-
eration is dusty, also wear a dust mask.
ROUTINE MAINTENANCE
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.
Periodic maintenance allows for long life and
trouble-free operation. A cleaning, lubrication
and maintenance schedule should be main-
tained. As a common preventive maintenance
practice, follow these recommended steps:
• When work has been completed, clean the
tool to allow smooth functioning of the tool
over time.
• Use clean, damp cloths to wipe the tool.
• Check the state of all electrical cables.
• Keep the motor's air openings free from oil,
grease, and sawdust or woodchips, and store
the tool in a dry place.
• Be certain that all moving parts are well lu-
bricated, particularly after lengthy exposure to
damp and/or dirty conditions.
REPLACEMENT OF CARBON BRUSHES
WARNING: For your safety, always turn off
the switch and unplug the saw from the power
source before performing any maintenance or
cleaning.
1. Unplug the saw before inspecting or replac-
ing brushes.
2. Replace both carbon brushes when either
has less than 1/4-in. length of carbon remain-
ing, or if the spring or wire is damaged or
burned.
3. Using a slotted screwdriver, remove the
black, plastic cap on each side of the motor,
and carefully withdraw the spring-loaded
brush assemblies. Keep brushes clean and slid-
ing freely in their guide channels.
NOTE: To reinstall the same brushes, make sure
that the brushes go back in the same way they
24
came out. This will avoid the need for a "run-
in" period.
4. Insert new brush assemblies into the guide
channels with the carbon part going in first,
being certain to fit the two metal "ears" into
their slots in the channel.
5. Remember to replace both end caps after in-
specting or servicing brushes. Tighten the caps
snugly, but do not over-tighten. Before use,
the saw should be allowed to "RUN IN" (run at
no load without a blade) for 5 minutes to seat
the new brushes properly.
CHANGING THE BLADE
WARNING: Be sure to wear protective work
gloves while handling a saw blade. The blade
can injure unprotected hands.
1. Unplug the saw from the power source.
WARNING: To prevent personal injury, AL-
WAYS disconnect the plug from power source
BEFORE assembling parts, making adjustments
or changing blades.
2. Place the saw, on its side, on a flat surface.
3. Loosen the depth-of-cut adjustment lever,
raise the saw up all the way, and tighten the
lever. This gives you easier access to the blade
mounting area.
4. Place the saw upright on its base on a flat
surface.
5. To loosen the spindle-clamping screw "A,"
depress the spindle-lock button. Insert the
blade wrench in the spindle clamping screw
"A." Move the wrench in and out slightly until
you feel the spindle lock button depress fur-
ther, which locks the blade in position so the
spindle clamping screw can be removed.
6. Keeping the spindle lock button firmly de-
pressed, turn the wrench clockwise to remove
the spindleclamping screw.
7. Use the blade-guard lever to raise the lower
Blade
Rotation
"A" Spindle
teeth point
Clamping
up at front
Screw
Outer
"D"
Washer