Bosch GSH 500 Professional Original Instructions Manual page 12

12 | English
Observe the relevant regulations in your country for the ma-
terials to be worked.
Operation
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Starting Operation
Pay attention to the mains voltage. The voltage of the
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power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Switching On and Off
– To start the power tool, press and hold the on/off switch
(5).
– Press the lock-on button (4) to lock the on/off switch (5)
in this position.
– To switch off the power tool, release the on/off switch
(5); or, if the switch is locked with the lock-on button (4),
briefly press the on/off switch (5) and then release it.
At low temperatures, the power tool will take a certain
amount of time to reach its full impact performance. You can
shorten this warm-up time by tapping the power tool's inser-
ted application tool on the ground once.
Changing the chiselling position (Vario-Lock) (see figure
C)
You can lock the chisel in 12 different positions, allowing
you to select the optimum working position for each task.
– Insert the chisel into the tool holder.
– Push the chisel adjustment ring (3) forwards and turn the
chisel to the required position with the chisel adjustment
ring (3).
– Release the chisel adjustment ring (3) and turn the chisel
until it audibly clicks into place.
Working Advice
Sharpening Chisels
Only sharp chiselling tools will produce good results, there-
fore sharpen your chiselling tools in good time before use.
This will ensure a long service life for the tools and good
work results.
Re-sharpening
Grind chiselling tools against sanding discs, e.g. aluminium
oxide, under a steady stream of water. Make sure that the
cutting edges show no annealing colours; this will impair the
hardness of the chiselling tools.
To forge a chisel, heat it to 850–1050 °C (pale red to yel-
low).
To harden a chisel, heat it to approx. 900 °C and quench in
oil. Then, leave it in an oven for approx. one hour at 320 °C
(annealing colour: pale blue).
1 609 92A 77U | (25.01.2022)
Maintenance and Service
Maintenance and Cleaning
Pull the plug out of the socket before carrying out any
u
work on the power tool.
To ensure safe and efficient operation, always keep
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the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
Replace a damaged dust protection cap immediately.
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It is recommended that you have use an after-sales
service for this.
Lubrication
The power tool is lubricated with grease and is ready for im-
mediate use.
The lubricating grease should only be changed during main-
tenance or commissioning carried out by an after-sales ser-
vice centre authorised to work with Bosch power tools. It is
crucial that only lubricating grease provided by Bosch is
used.
The lubricating grease must be changed every time the car-
bon brushes are replaced. The old lubricating grease must
be removed before new lubricating grease is applied.
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. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
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
At www.bosch-pt.co.uk you can order spare parts or arrange
the collection of a product in need of servicing or repair.
Tel. Service: (0344) 7360109
E-Mail: boschservicecentre@bosch.com
You can find further service addresses at:
www.bosch-pt.com/serviceaddresses
Disposal
The power tool, accessories and packaging should be re-
cycled in an environmentally friendly manner.
Bosch Power Tools