Dust/Chip Extraction; Maintenance And Service; Maintenance And Cleaning - Bosch Professional GSH 27 VC Manual Original

OBJ_BUCH-1144-004.book Page 12 Thursday, July 28, 2011 1:50 PM
12 | English
Declaration of Conformity
We declare under our sole responsibility that the product de-
scribed under "Technical Data" is in conformity with the fol-
lowing standards or standardization documents: EN 60745
according to the provisions of the directives 2004/108/EC,
2006/42/EC, 2000/14/EC.
2000/14/EC: Guaranteed sound power level 108 dB(A).
Conformity assessment procedure according to Annex VI.
Equipment category: 10
Notified body:
TÜV NORD CERT GmbH & Co. KG,
Am TÜV 1, 30519 Hannover
Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ESC,
D-70745 Leinfelden-Echterdingen
Dr. Egbert Schneider Dr. Eckerhard Strötgen
Senior Vice President Head of Product
Engineering Certification
Robert Bosch GmbH, Power Tools Division
D-70745 Leinfelden-Echterdingen
04.12.2009
Assembly
Changing the Tool
Before any work on the machine itself, pull the mains
plug.
Clean the tool shank 5 and apply a light coat of grease.
Tools without Shoulder (see figures A–B)
Pivot the tool retainer 3 upward by approx. 150° and insert
the tool into the tool holder 4.
Pivot the tool retainer 3 down to lock the tool.
Check the latching by pulling the tool.
Tools with Shoulder (see figures C–D)
Tools with an insertion length of 152 mm (6") to the shoulder
can be used.
Pivot the tool retainer 3 upward by approx. 180° and insert
the tool into the tool holder 4.
Pivot the tool retainer 3 back to the tool to lock it. The shoul-
der 6 must be held by the tool retainer 3.
Check the latching by pulling the tool.

Dust/Chip Extraction

Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
1 619 929 J09 | (28.7.11)
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
Operation
Starting Operation
Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Switching On and Off
To start the machine, press the On/Off switch 1 and keep it
pressed.
To switch off the machine, release the On/Off switch 1.
For low temperatures, the machine reaches the full impact
rate only after a certain time.
This start-up time can be shortened by striking the chisel in
the machine against the floor one time.
Working Advice
For the highest possible impact damping, work only with
moderate pressure.
Sharpening Chisels
Good results are only achieved with sharp chisels; therefore,
sharpen the chiselling tools in good time. This ensures a long
service life of the tools and good working performance.
Re-sharpening
Sharpen chiselling tools using grinding wheels (e. g. ceramic
bonded corundum wheel) with a steady supply of water. Ref-
erence values are shown in the figure. Take care that no an-
nealing coloration appears on the cutting edges; this impairs
the hardness of the chiselling tools.
60
4
60
20
For forging, heat the chisel to between 850 and 1050 °C
(bright red to yellow).
For hardening, heat the chisel to approx. 900 °C and quench
in oil. Then anneal in an oven for approx. one hour at 320 °C
(annealing colour = light blue).

Maintenance and Service

Maintenance and Cleaning

Before any work on the machine itself, pull the mains
plug.
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Bosch Power Tools