Bosch GSH 16-28 Original Instructions Manual page 8

8 | English
– Pivot the tool retainer (6) back down to lock the applica-
tion tool in place.
– Check that it is locked by pulling on the tool.
Application tools with collar (see figures C – D)
Application tools with an insertion length of 152 mm (6") to
the collar can be used.
– Pivot the tool retainer (6) upwards by approx. 180° and
insert the application tool into the tool holder (8).
– Pivot the tool retainer (6) back as far as the application
tool to lock it in place. The collar (9) must be held by the
tool retainer (6).
– Check that it is locked by pulling on the tool.
Changing the tool (GSH 16-30)
Pull the plug out of the socket before carrying out any
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work on the power tool.
– Clean the tool shank (7) and apply a light coat of grease.
– Pull out the lock bolt (5) and turn it 180° anticlockwise.
Allow the lock bolt 5 to engage again.
– Insert the application tool all the way into the tool holder
(8). The groove of the tool shank (7) must face upwards
as shown in the figure.
– Pull out the lock bolt (5) and turn it 180° clockwise. Allow
the lock bolt (5) to engage again.
– Check that it is locked by pulling on 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 carci-
nogenic, especially in connection with wood-treatment ad-
ditives (chromate, wood preservative). Materials containing
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 ma-
terials to be worked.
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Operation
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.
Switching on/off
– To start the machine, push the on/off switch (2) into pos-
ition "I".
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– To switch off the machine, push the on/off switch (2)
into position "0".
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.
Working advice
Pull the plug out of the socket before carrying out any
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work on the power tool.
When working, hold the power tool by the handle (1) with
both hands. The handle (1) can move upwards and down-
wards around its axis by approx. 30 mm. This has a damping
effect against vibrations.
For the highest possible impact damping, work only with
moderate pressure.
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.
Resharpening
Grind chiselling tools against sanding discs, e.g. aluminium
oxide, under a steady stream of water. Take care that no an-
nealing colouration appears on the cutting edges; this im-
pairs the hardness of the chiselling tools.
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4
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20
To forge a chisel, heat it to between 850 and 1050 °C (pale
red to yellow).
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).
Maintenance and Service
Maintenance and Cleaning
Pull the plug out of the socket before carrying out any
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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.
When the carbon brushes are worn out, the power tool
switches itself off. The power tool must be sent to the after-
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Bosch Power Tools