14
Preventive maintenance performed by
unauthorized personnel may result in
misplacing of internal wires and components
which can cause serious hazard.
The brushes and commutator in your tool
have been engineered for many hours of
dependable service. In order to prepare your
brushes for use, run your tool at full speed for
5 minutes under no load. This will properly
“seat” your brushes, which extends the life of
both your brushes and your tool. To maintain
peak efficiency of the motor, we recommend
every 50-60 hours the brushes be examined.
The brushes should be inspected frequently
when tools are used continuously. If your tool
runs sporadically, loses power, makes unusual
noises or runs at a reduced speed, check
the brushes. To continue using the tool in this
condition will permanently damage your tool.
With the cord unplugged, remove the brush
caps one at a time with a small screwdriver
by rotating cap counter-clockwise and check
each brush.
If the brush is less then 1/8” long and the
end surface of the brush that contacts the
commutator is rough and/or pitted, they
should be replaced. Check both brushes.
Usually the brushes will not wear out
simultaneously. If one brush is worn out,
replace both brushes. Make sure the brushes
are installed as illustrated. The curved surface
of the brush must match the curvature of the
commutator. After replacing brushes the tool
should be run at no-load; place it on a clean
surface and run it freely at full speed for 5
minutes before loading (or using) the tool.
This will allow the brushes to “seat” properly
and will give you more hours of life from each
set of brushes. This will also extend the total
life of your tool since the commutator surface
will “wear” longer.
Under normal use the double ball bearing will
not require lubrication.
Ventilation opening and switch levers must be
kept clean and free of foreign matter. Do not
attempt to clean by inserting pointed objects
through openings.
Certain cleaning agents and solvents damage
plastic parts. Some of these are: gasoline,
carbon tetrachloride, chlorinated cleaning
solvents, ammonia and household detergents
that contain ammonia.
MAINTENANCE
SERVICE
CARBON BRUSHES
MAINTENANCE OF REPLACEABLE
BRUSHES
BEARINGS
CLEANING
To avoid accidents always
disconnect the tool from
the power supply before
cleaning or performing any maintenance.
The tool may be cleaned most effectively
with compressed dry air.
Always wear
safety goggles when cleaning tools with
compressed air.
WARNING
