Manual Bosch GBH 5-40 DE (page 19 of 210) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Spanish, Norwegian, Finnish)

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English | 19

Bosch Power Tools 1 619 929 791 | (1.8.08)

The constant electronic control keeps the prese-

lected speed and impact rate nearly constant

between no-load and load conditions.

When plugging the plug into the socket outlet or

after a power failure, the constant electronic

control automatically sets the highest speed

and impact rate. This ensures working at opti-

mum performance despite too low preadjust-

ment of the thumbwheel 6.

Select the impact rate with the thumbwheel 6

according to the material.

The data in the following table are recommend-

ed values.

Safety Clutch

f If the tool insert becomes caught or

jammed, the drive to the drill spindle is in-

terrupted. Because of the forces that occur,

always hold the power tool firmly with both

hands and provide for a secure stance.

f If the power tool jams, switch the machine

off and loosen the tool insert. When switch-

ing the machine on with the drilling tool

jammed, high reaction torques can occur.

Changing the Chiselling Position (Vario-Lock)

The chisel can be locked in 12 positions. In this

manner, the optimum working position can be

set for each application.

Insert the chisel into the tool holder.

Turn the mode selector switch 3 to the “Vario-

Lock” position (see “Setting the Operating

Mode”, page 18).

Turn the tool holder to the desired chiselling po-

sition.

Turn the mode selector switch 3 to the “chisel-

ling” position. The tool holder is now locked.

f The mode selector switch 3 must always be

locked in the “Chiselling” position when

chiselling.

Working Advice

Vibration Damper

The integrated vibration damper reduces occur-

ring vibrations.

The soft grip handle increases the safety against

slipping off and thus provides for a better grip

and handling of the power tool.

Maintenance and Service

Maintenance and Cleaning

f Before any work on the machine itself, pull

the mains plug.

f For safe and proper working, always keep

the machine and ventilation slots clean.

f A damaged dust protection cap should be

changed immediately. We recommend hav-

ing this carried out by an after-sales serv-

ice.

Service Indicator 7

When the carbon brushes are worn out, the ma-

chine switches itself off. This is indicated ap-

prox. 8 hours beforehand by the lighting or

blinking of the service indicator 7. The machine

must then be sent to an after-sales service

agent. Addresses are listed in the Section “Af-

ter-sales Service and Customer Assistance”.

Stand-by Indicator 8

When the mains plug is plugged in and mains

voltage is given, the stand-by indicator 8 must

be lit. When the machine cannot be switched on

despite lit stand-by indicator 8, it must be sent

to an after-sales service agent; for addresses,

see section “After-sales Service and Customer

Assistance”, page 20.

Application Thumbwheel

Position

Working roughcast/light

building materials

Removing tiles

Working brick

Working concrete

OBJ_BUCH-491-003.book Page 19 Friday, August 1, 2008 10:42 AM

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