Maintenance - Dremel 400 Series XPR Safety Manual

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 clean-
ing.
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 to pry up and release the clip on
the brush cover (Figure A).
2. Remove the brushes from the tool by
pulling the shunt and brass clip which
are attached to the brush (Figure B).
NOTE: Be sure to note how the brass clip
slides out of the slot next to the brush pock-
et. Also, note how the detent on brass clip fits
into brush pocket slot, which secures the
brass clip into proper position.
3. Check each brush for wear. If brush is
less than 3/8" long, or if contact end is
rough or pitted, replace the brush.

MAINTENANCE

A
B
Removing/Inspecting Brushes
C
14
Removing Brush Cover
"V" Notch
Installing Brushes