Maintenance And Service; Maintenance And Cleaning - Bosch GSH 27 VC Professional Manual Original

OBJ_BUCH-1144-007.book Page 12 Tuesday, September 13, 2016 9:28 AM
12 | English
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 in-
sert the tool into the tool holder 4.
– Pivot the tool retainer 3 back to the tool to lock it. The
shoulder 6 must be held by the tool retainer 3.
– Check the latching by pulling the tool.
Dust/Chip Extraction
 Dust 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 dust can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dust, such as oak or beech dust, is considered car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
– 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.
To save energy, only switch the power tool on when using it.
Working Advice
 Before any work on the machine itself, pull the mains
plug.
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.
1 609 92A 2BG | (13.9.16)
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.
 For safe and proper working, always keep the machine
and ventilation slots clean.
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.
When the carbon brushes wear below acceptable service tol-
erances, the machine will automatically cut out. The machine
must be sent to customer service for maintenance (for ad-
dress, see the "After-sales Service and Application Service"
section).
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.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham
Uxbridge
UB 9 5HJ
60
Bosch Power Tools