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BM 1619929713 04-07
All grease packed hammers require a short
period of time to warm up. Depending on the
room temperature, this time may vary from
approximately 15 seconds (90˚F) to 2
minutes (32˚F). A new hammer requires a
break-in period before full performance is
realized. This period may require up to 5
hours of operation.
Service
Preventive maintenance
!
WARNING
performed by unauthorized
personnel may result in misplacing of
internal wires and components which
could
cause
recommend that all tool service be performed
by a Bosch Factory Service Center or Autho-
rized Bosch Service Station.
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.
CARBON BRUSHES
The brushes and commutator in your tool
have been engineered for many hours of
dependable service.
Your tool is equipped with a Pop-out brush
system. The tool will shut off when brush
replacement, lubrication and preventive
maintenance are needed.
Only genuine Bosch replacement brushes
specially designed for your tool should be
used.
If an extension cord is
!
WARNING
necessary, a cord with
adequate size conductors that is capable
of carrying the current necessary for your
tool must be used. This will prevent
excessive voltage drop, loss of power or
overheating. Grounded tools must use 3-wire
extension cords that have 3-prong plugs and
receptacles.
NOTE: The smaller the gauge number, the
heavier the cord.
4/6/07
4:10 PM
Maintenance
serious
hazard.
Accessories
Page 9
Avoid no load running of the tool. No load or
"empty blows" is the most damaging factor to
any impact hammer.
As earlier pointed out, sharp accessories as
well as clean air vents are necessary for
efficient operation. Establish and follow a set
maintenance program.
Every second brush change, the bearings
should be replaced at Bosch Factory Service
Center or Authorized Bosch Service Station.
Bearings which become noisy (due to heavy
load or very abrasive material cutting) should
We
be replaced at once to avoid overheating or
motor failure.
!
WARNING
the power supply before cleaning or
performing any maintenance. The tool may
be cleaned most effectively with compressed
dry air. Always wear safety goggles when
cleaning 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.
!
CAUTION
plastic parts. Some of these are: gasoline,
carbon tetrachloride, chlorinated cleaning
solvents,
ammonia
detergents that contain ammonia.
RECOMMENDED SIZES OF EXTENSION CORDS
120 VOLT ALTERNATING CURRENT TOOLS
Cord Size in A.W.G.
Tool's
Ampere
Cord Length in Feet
Rating
25
50
3-6
18
16
6-8
18
16
8-10
18
16
10-12
16
16
12-16
14
12
-9-
BEARINGS
Cleaning
To avoid accidents always
disconnect the tool from
Certain cleaning agents
and solvents damage
and
household
Wire Sizes in mm
Cord Length in Meters
100 150
15
30
60
16
14
0.75 0.75 1.5
14
12
0.75 1.0 2.5
14
12
0.75 1.0 2.5
14
12
1.0 2.5 4.0
—
—
—
—
—
2
120
2.5
4.0
4.0
—
—
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