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BM 1619929L34 06-12_BM 1619929L34 06-12.qxp 6/29/12 10:51 AM Page 9
PADDLE "ON/OFF" SWITCH
The paddle switch enables the operator to
control the switch functions of "ON /OFF".
TO SWITCH THE TOOL "ON": Squeeze
and hold the paddle lever. TO SWITCH THE
The tool may be switched on with either hand.
Balance the tool with both hands and rest the
tool on the hip.
For the best penetration rates in concrete, run
the tool with a steady pressure, but do not use
excessive force as this will decrease the
efficiency of the tool. Start chipping with the
tool in a straight in position until the surface to
be broken is chipped. Draw the hammer back
at an angle of 60˚ with the surface to be
broken. Apply only enough force to keep the
tool weight on the accessory
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
Preventive maintenance
WARNING
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 Bosch
Factory Service Center or Authorized 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.
Operating Instructions
"TOOL TIPS"
Maintenance
Service
TOOL "OFF ": Release pressure on the
paddle lever. The switch is spring loaded and
will return automatically.
(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.
Avoid no load running of the tool. No load or
"empty blows" is the most damaging factor to
any impact hammer.
An electric hammer is likely to be the most
expensive portable tool at the construction job.
The long wear and efficient operation of the
BOSCH hammers will more than justify the
cost for tools of this type. As earlier pointed
out, sharp accessories as well as clean air
vents are necessary for efficient operation.
Establish and follow a set maintenance
program.
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.
BEARINGS
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
be replaced at once to avoid overheating or
motor failure.
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