Maintenance - Dremel 300 Series Instructional Safety Manual

DM 2610925781 5-05.qxd
Preventative maintenance
WARNING
!
performed by unautho-
rized personnel may result in misplacing
of internal wires and components which
could cause serious hazard. We recom-
mend that all tool service be performed by
a Dremel™ Service Facility.
To avoid injury from unex-
WARNING
!
pected starting or electri-
cal shock, always remove plug from wall
outlet before performing service or
cleaning.
Carbon Brushes
The brushes in your tool have been engi-
neered for many hours of dependable serv-
ice.
To prepare the brushes for use, run the tool
at full speed for 5 minutes under no load.
This will properly "seat" the brushes, and
extend the life of the tool.
To maintain peak efficiency of the motor,
examine the brushes for wear every 40-50
hours.
Using the tool with worn
CAUTION
!
brushes will permanently
damage the motor.
Use only original Dremel™ replacement
brushes.'
Inspect the rotary tool brushes after 40-50
hours of use. If the rotary tool runs erratical-
ly, loses power, or makes unusual noises
check the brushes for wear and possible
replacement. Remember: brushes in the
rotary tool are similar to oil in a car; the more
you check/service, the better the perform-
ance.
Follow these steps to check/change the rotary
tool brushes:
1 With the power cord unplugged, place
the tool on a clean surface. Use the tool
wrench as a screwdriver to remove the
brush caps in a counter-clockwise
direction (Figure A).
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MAINTENANCE

A
2. Remove the brushes from the tool by
B
3. If one brush is worn, you should replace
15
Removing Brush Cover
pulling on the spring that is attached to
the carbon brush. If the brush is less
than 1/8" long and the surface of the
brush that touches the commutator is
rough or pitted, the carbon brushes
should be replaced. Be sure to check
both brushes (Figure B).
Removing/Inspecting Brushes
both brushes for better performance of
your rotary tool. Remove the spring
from the brush, throw away the old
brush and place the spring on a new
brush.