-16-
RUNNING NUTS AND BOLTS
Variable speed contr ol mus t be used with
caution for driving nuts and bolts with socket
set att ach ments. The techniq ue is to start
slowly, increasing speed as the nut or bolt runs
down. Set the nut or bolt snugly by slowing the
tool to a stop. If this procedure is not followed,
the tool will have a tendency to torque or twist
in your hands when the nut or bolt seats.

Service

NO USER SERV ICEABLE
PARTS INSIDE. Preventive
maintenance per formed by un au thorized
personn el m ay r esult in misp lacing of
intern al wires an d co mpone nts whic h
could c ause s erious hazard. We reco m -
mend that all tool service be performed by a
Bosch Factory Service Center or Authorized
Bosc h Serv ice St ati on. SE RVIC E MEN:
Disconnect t ool and/or charger from power
source before servicing.
BATTERIES
Be alert for battery packs that are nearing
their end of life. If you notice decreased
tool perf orman ce or s ignif icant ly short er
running time between charges then it is time
to replace the battery pack. Failure to do so
can cause the tool to operate improperly or
damage the charger.
TOOL LUBRICATION
Your Bosch tool has been properly lubricated
and is ready for use.
CARBON BRUSHES
The brushes and commutator in your tool have
been engineered for many hours of
dependable service.
If your tool runs spo rad ically, loses p ower,
makes unusual noises or runs at a reduced
speed, check the brushes. To continue using
the tool in this condition will permanently
damage your tool.
Check both brushes. Usually the brushes will
not wear out simul taneously. If one brush is
worn out, replace both brushes.
To check brushes: Disconnect battery pack
from tool. Rotate brush cap at the rear part of
housing cou nter-c lockwi se w ith a coi n or
screwdriver and remove cap (Fig. 10).
Lift out the brushes; note which way they face,
so that the brushes can be returned to their
original position. New brushes can also be
inserted turned 180º. Clean the brush holder
openings with com pressed air or a clean cloth
and replace the brushes and brush covers.
After replacing brushes the tool should be run
at no-load and run it freely at full speed for 2
minutes before using the tool. This will allow
the brushes to “seat” properly and will give
you more ho urs of life fr om each set of
brushes.
Only genuine Bosch replacement brushes
specially designed for your tool should be
used.
D.C. MOTORS
The motor in your tool has been engineered
for many hours of dependabl e servi ce. To
maintain peak effic iency of t he mo tor, we
recommend it be examined every six months.
Only a genuine Bosch replacement motor
specially designed for your tool should be
used.
Maintenance
!
WARNING
BRUSH
CAP
BRUSH
FIG. 10
BM 2609140642 05-09:BM 2609140642 05-09 5/19/09 10:16 AM Page 16