Maintenance And Service; After-Sales Service And Application Service - Bosch HWS Serie Manual Original

OBJ_BUCH-2482-003.book Page 22 Friday, December 9, 2016 12:33 PM
22 | English
Cutting Stone
 Provide for sufficient dust extraction when cutting
stone.
 Wear a dust respirator.
 The machine may be used only for dry cutting/grinding.
For cutting stone, it is best to use a diamond cutting disc. For
safety against jamming, a special cutting guide with dust ex-
traction protection guard (accessory) must be used.
Operate the machine only with dust extraction and additional-
ly wear a dust protection mask.
The vacuum cleaner must be approved for the extraction of
masonry dust. Bosch provides suitable vacuum cleaners.
– Switch on the machine and place the front part of the cut-
ting guide on the workpiece. Slide the machine with mod-
erate feed, adapted to the material to be worked.
For cutting especially hard material, e. g., concrete with high
pebble content, the diamond cutting disc can overheat and
become damaged as a result. This is clearly indicated by cir-
cular sparking, rotating with the diamond cutting disc.
In this case, interrupt the cutting process and allow the dia-
mond cutting disc to cool by running the machine for a short
time at maximum speed with no load.
Noticeably decreasing work progress and circular sparking
are indications of a diamond cutting disc that has become
dull. Briefly cutting into abrasive material (e. g. lime-sand
brick) can resharpen the disc again.
Information on Structures
Slots in structural walls are subject to the Standard DIN 1053
Part 1, or country-specific regulations.
These regulations are to be observed under all circumstanc-
es. Before beginning work, consult the responsible structural
engineer, architect or the construction supervisor.
Rough Grinding
 Never use a cutting disc for roughing.
The best roughing results are achieved when setting the ma-
chine at an angle of 30° to 40°. Move the machine back and
forth with moderate pressure. In this manner, the workpiece
will not become too hot, does not discolour and no grooves
are formed.

Maintenance and Service

Maintenance and Cleaning
 Disconnect the power supply before making any ad-
justments, changing accessories, or placing the ma-
chine aside. This safety measure prevents accidental
starting of the power tool.
 For safe and proper working, always keep the machine
and ventilation slots clean.
 In extreme conditions, always use dust extraction as
far as possible. Blow out ventilation slots frequently
and install a portable residual current device (PRCD).
When working metals, conductive dust can settle in the in-
terior of the power tool. The total insulation of the power
tool can be impaired.
1 609 92A 36N | (9.12.16)
 Regularly measure the no-load speed of the grinder
spindle. When the measured value is more than 10 %
above or below the specified no-load speed (see "Tech-
nical Data"), have the machine checked by an author-
ised service agent for Bosch power tools. When the no-
load speed is too high, the application tool can break;
when the no-load speed is too low, the working perfor-
mance is reduced.
 Use only original cables! Before each use, check the
power tool, cable and plug for possible damage. Cables
and plugs may not be repaired, but must be exchanged in
order to avoid danger.
 Have maintenance and repair work performed only by
qualified specialists. In this manner, it can be ensured
that the safety of the power tool is maintained.
Clean the connection sockets, couplers and plugs of the tool,
after it has been disconnected from the mains supply, using a
dry, lint-free cloth and remove dust and dirt particles.
Clean the gearbox after the first 150 running hours using a
mild solvent. Follow the solvent manufacturers directions for
use and disposal. Lubricate the gearbox using Bosch gearbox
lube. Repeat the lubrication procedure every 300 hours after
the initial gearbox service.
An authorized Bosch after-sales service agent will carry out
this work quickly and reliably.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
Please store and handle the accessory(-ies) carefully.
Accessories
Information about the complete quality accessory program
can be found on the Internet at www.bosch-pt.com and
www.boschproductiontools.com or at your dealer.

After-sales Service and Application Service

Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the nameplate of
the product.
Bosch Power Tools