And Lubrication - Bosch 4405 Instrucciones De Funcionamiento Y Seguridad

Maintenance and Lubrication
Service
Preventive maintenance performed
by unauthorized personnel may
result in misplacing of internal wires and components
which could cause serious hazard. We recommend
that all tool service be performed by a Bosch Factory
Service Center or Authorized Bosch Service Station.
Call 1-877-BOSCH99 to locate a service center.
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 recom-
mend every two to six months the brushes be exam-
ined. Only genuine Bosch replacement brushes spe-
cially designed for your tool should be used.
Motor Brush Replacement
To Inspect or Replace Brushes:
NOTE: If installing the existing brush or brushes,
make sure the brush goes in the same way it came
out. Otherwise a break-in period will occur that will
reduce motor performance and increase brush wear.
1. Unplug the saw.
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3.
4.
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6.
The brush cap is spring loaded by
the brush assembly.
Remove the brush cap on the motor using a
wide flat blade screwdriver.
Pull out the brush (Figure 37). Repeat for the
opposite side.
Inspect brushes for wear. On the wide flat side
of brush is a wear limit line. If the brush contact
face is at or beyond (no line visible) the limit
replace brushes as a set.
Install new brush. The two (2) tabs on the brush
terminal go in the same hole the carbon part fits into.
Tighten the brush cap but do not overtighten.
Brush
Terminal
Brush Wear Line
Figure 37. Motor Brush
Cleaning
To avoid accidents, always discon-
nect the tool from the power supply
before cleaning or performing any maintenance. The
tool may be cleaned most effectively with com-
pressed air. Always wear safety goggles when clean-
ing 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.
Check regularly to make sure the lower guard and all
moving parts are working properly.
Remove accumulated sawdust from working parts by
blowing with compressed air or wiping with a damp cloth.
Certain cleaning agents and sol-
vents damage plastic parts. Some
of these are: gasoline, carbon tetrachloride, chlori-
nated cleaning solvents, ammonia and household
detergents that contain ammonia. Ammonia should
never be used on aluminum.
Care of Blades
Blades become dull even from cutting regular lumber.
If you find yourself forcing the saw forward to cut
instead of just guiding it through the cut, chances are
the blade is dull or coated with wood pitch.
When cleaning gum and wood pitch from blade,
unplug the saw and remove the blade. Remember,
blades are designed to cut, so handle carefully. Wipe
the blade with kerosene or similar solvent to remove
the gum and pitch. Unless you are experienced in
sharpening blades, we recommend you do not try.
Tool Lubrication
Your Bosch 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. We recommend that this service be
performed by a Bosch Factory Service Center or
Authorized Bosch Service Station. Call 1-877-
BOSCH99 to locate a service center.
Periodically lubricate moving parts with a silicone, or
light oil spray. Do not use grease because it tends to
attract and hold sawdust.
Bearings
All bearings in this tool are lubricated with a sufficient
amount of high grade lubricant for the life of the unit
under normal operating conditions. No further lubri-
cation is required.
32.