Maintenance; Tool Lubrication; Carbon Brushes - Skil 4390 Operating/Safety Instructions Manual

SM 1619X00459 1-05
Service
Preventive maintenance
! WARNING
performed by unauth-
orized personnel may result in misplacing
of internal wires and components which
could cause
recommend that all tool service be performed
by a Skil Factory Service Center or Autho-
rized Skil Service Station.

TOOL LUBRICATION

Your Skil tool has been properly lubricated
and is ready to use. It is recommended that
tools with gears be regreased with a special
gear lubricant at every brush change.

CARBON BRUSHES

The brushes and commutator in your tool
have been engineered for many hours of
dependable service. To maintain peak
efficiency of the motor, we recommend every
two to six months the brushes be examined.
Only genuine Skil replacement brushes
specially designed for your tool should be
used.
BEARINGS
After about 300-400 hours of operation, or at
every second brush change, the bearings
If an extension cord is
! WARNING
necessary, a cord with
adequate size conductors that is capable
of carrying the current necessary for your
tool must be used. This will prevent
excessive voltage drop, loss of power or
overheating. Grounded tools must use 3-
wire extension cords that have 3-prong plugs
and receptacles.
NOTE: The smaller the gauge number, the
heavier the cord.
12/8/04 9:19 PM

Maintenance

serious hazard.
Accessories
Page 12
should be replaced at Skil Factory Service
Center or Authorized Skil Service Station.
Bearings which become noisy (due to heavy
load or very abrasive material cutting) should
be replaced at once to avoid overheating or
motor failure.
We
! WARNING
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.
Ventilation openings and switch levers must
be kept clean and free of foreign matter. Do
not attempt to clean by inserting pointed
objects through openings.
! CAUTION
plastic parts. Some of these are: gasoline,
carbon tetrachloride, chlorinated cleaning
solvents, ammonia
detergents that contain ammonia.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
Cord Size in A.W.G.
Tool's
Ampere
Cord Length in Feet
Rating
25 50
3-6 18 16
6-8 18 16
8-10 18 16
10-12 16 16
12-16 14 12
-12-
Cleaning
To avoid accidents always
disconnect the tool from
Certain cleaning agents
and solvents damage
and household
Wire Sizes in mm
Cord Length in Meters
100 150 15 30 60
16 14 0.75 0.75 1.5
14 12 0.75 1.0 2.5
14 12 0.75 1.0 2.5
14 12 1.0 2.5 4.0
— — — — —
2
120
2.5
4.0
4.0
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