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18
Extension Cords
2. Remove the brushes from the tool by
pulling on the spring that is attached to the
carbon brush. If the brush is less than 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 (Fig. 11).
Usually the brushes will not wear out simul -
taneously. If one brush is worn out, replace
both brushes. Make sure the brushes are
installed as illus trated. The curved surface of
the brush must match the curvature of the
commutator. Also check that the brush caps
sit flush with the tool housing.
3. 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 com mutator
surface will “wear” longer.
BEARINGS
Model 4300 has ball bearing construction.
Under normal use no additional lubrication is
required.
Cleaning
To avoid accidents
always dis connect the
tool from the power supply before
cleaning or performing any main tenance.
The tool may be cleaned most effectively
with compressed dry air. Always wear
safety gog gles when cleaning tools with
compressed air.
Ventilation openings and switch levers must
be kept clean and free of foreign matter. Do
not at tempt to clean by inserting pointed
objects through openings.
Certain cleaning agents
and solvents damage
plastic parts. Some of these are: gasoline,
carbon tetrachloride, chlo rinated cleaning
solvents, ammonia and household
detergents that contain ammonia.
If an extension cord is
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
higher the cord capacity.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
FIG. 10
BRUSH
BRUSH SPRING
BRUSH CAP
Curved end of brush
must match curvature of
commutator
FIG. 11
Tool’s
Ampere
Rating
Cord Size in A.W.G. Wire Sizes in mm
2
Cord Length in Feet Cord Length in Meters
25 50 100 150
15 30 60 120
3-6
6-8
8-10
10-12
12-16
18
18
18
16
14
16
16
16
16
12
16
14
14
14
–
14
12
12
12
–
0.75
0.75
0.75
1.0
–
0.75
1.0
1.0
2.5
–
1.5
2.5
2.5
4.0
–
2.5
4.0
4.0
–
–
1600A012FN.qxp_4300 1/30/17 10:06 AM Page 18
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