Manual Bosch GDB 350 WE Professional (page 12 of 177) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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12 | English

1 609 92A 1A4 | (12.5.15) Bosch Power Tools

Declaration of Conformity

We declare under our sole responsibility that the product de-

scribed under “Technical Data” is in conformity with all rele-

vant provisions of the directives 2011/65/EU, until

19 April 2016: 2004/108/EC, from 20 April 2016 on:

2014/30/EU, 2006/42/EC including their amendments and

complies with the following standards: EN 61029-1,

EN 61029-2-6.

Technical file (2006/42/EC) at:

Robert Bosch GmbH, PT/ETM9,

70764 Leinfelden-Echterdingen, GERMANY

Robert Bosch GmbH, Power Tools Division

70764 Leinfelden-Echterdingen, GERMANY

Leinfelden, 04.05.2015

Assembly

 Before any work on the machine itself, pull the mains

plug.

Mounting the Carrying Handle

Before first-time use, securely fit the carrying handle 12 to

the power tool using the internal hex screws 13.

Clamping In Drill Stand for Diamond Drills

GCR 350

 The safety and operating instructions for the drill stand

being used are to be strictly observed!

For mounting the power tool into the drill stand, please read

and observe the operating instructions of the drill stand.

Inserting/Replacing the Core Bit

 Before any work on the power tool, during work breaks

and when not using the power tool, secure the power

tool against unintentional movement by tightening the

parking brake 5. To do so, read and follow the operating

instructions of the drill stand.

Inserting a Core Bit

 Examine the core bit before inserting it. Use only core

bits that are in perfect condition. Damaged or deformed

core bits can lead to dangerous situations.

Clean the core bit before inserting it. Apply a light coat of

grease to the core bit thread or spray on a corrosion protec-

tion agent.

Screw a 1 1/4"-UNC core bit 9 onto the drill spindle 10.

 Check the proper seating of the core bit. Incorrectly or

unsecurely fastened core bits can become loose during op-

eration and may pose a danger.

Removing a Core Bit

 Wear protective gloves when replacing the core bit.

The core bit can become hot after prolonged operation of

the power tool.

Loosen the core bit 9 using an open-end spanner (size

41 mm). When doing so, hold a second open-end spanner

(size 32 mm) on the two flats of the drill spindle 10 to provide

counterforce.

The easy-release element 11 makes it easier to release the

core bit 9.

Connecting the Water Cooling

When wet-drilling core bits are not sufficiently cooled during

drilling, the diamond segments can become damaged or the

core bit can become jammed in the bore hole. Therefore, pro-

vide for a sufficient water supply during wet drilling.

When boring out a given bore, the given bore must be careful-

ly plugged in order to enable sufficient cooling of the core bit.

 Connected hoses, shut-off valves or accessories must

not obstruct or hinder the drilling process.

Shut the water cock 8. Connect water supply to the water-out-

let connector 7. The water supply is possible either via a mo-

bile water-pressure container (accessory) or via stationary

water connection.

You require a water collection ring and a wet/dry vacuum

cleaner (both accessories) to collect the water escaping from

the bore hole during wet drilling.

 When wet drilling overhead, the escaping water must

be collected. To do this, insert the power tool into a drill

stand and mount a water collecting ring.

Read and observe the operating instructions of the water col-

lection ring to mount it.

Operation

Starting Operation

 Observe the mains voltage! The voltage of the power

source must correspond with the data on the type plate of

the machine.

 Before beginning work, consult the structural engi-

neer, architect or construction supervisor in charge.

Only cut through reinforcements with the permission

of a structural engineer.

 When core drilling through walls or floors, ensure to

check the respective rooms/enclosures for obstruc-

tions. Barrier off the construction site and secure the

drilled out core against falling down with the use of cas-

ing or similar.

Function test of the portable residual current device

(PRCD)

Each time before beginning work, check that the portable re-

sidual current device (PRCD) 2 is functioning properly:

– Press the “TEST” button on the portable residual current

device (PRCD). The red control indicator extinguishes.

– Press the “RESET” button. It must now be possible to

switch the power tool on.

Henk Becker

Executive Vice President

Engineering

Helmut Heinzelmann

Head of Product Certification

PT/ETM9

OBJ_BUCH-2203-002.book Page 12 Tuesday, May 12, 2015 9:22 AM

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Bosch GDB 350 WE Professional Manual

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