DM 2610005595
Maintenance Information
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 Dremel Service Facility.
! WARNING To avoid injury from unexpected starting or
electrical shock, always remove plug from wall outlet before performing service or cleaning.
CARBON BRUSHES
The brushes and commutator in your tool have been engineered for many hours of dependable service.
In order to prepare your brushes for use, run your tool at full speed for 5 minutes under no load. This will properly “seat” your brushes, which extends the life of both your brushes and your tool.
To maintain peak efficiency of the motor, we recommend every 40 - 50 hours the brushes be examined. Only genuine Dremel replace- ment brushes specially designed for your tool should be used.
MAINTENANCE OF REPLACEABLE
BRUSHES ON MODEL 4000
The brushes should be inspected frequently when tools are used continuously. If your tool runs sporadically, loses power, makes unusual noises or runs at a reduced speed, check the brushes.
To continue using the tool ! CAUTION in this condition will
permanently damage your tool.
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
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 (Figure D).
FIG. C
R
BRUSH CAP | FIG. D |
BRUSH SPRING
R
CURVED END OF
BRUSH MUST
MATCH
BRUSH CURVATURE OF
HOUSING
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 illustrated. 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
“wear” longer.
12
