Installation
Fuel
Two-stroke oil
The fuel is petrol with a 2% oil mixture (1 part oil to
50 parts petrol). Always use high quality lead-free
petrol (non-alkylat).
For the best lubricating results use Atlas Copco’s
environmentally friendly two-stroke oil, which has
been specially developed for Atlas Copco’s petrol
engined hammering and rock-drilling machines.
If Atlas Copco’s two-stroke oil is not available, use
a high quality two-stroke oil for air-cooled engines
(not two-stroke oil for outboard engines). Contact
your local Atlas Copco representative for advice on
the correct two-stroke oil.
Mixing the petrol and oil
Always mix the petrol and oil in a clean petrol can.
First add the oil and then the correct amount of
petrol. Then shake the can thoroughly. Shake the
can before every refilling.
NOTICE
During long term storage of two-stroke
mixture, the oil and petrol can separate. Never mix
more fuel than you intend to use within two weeks.
Filling
WARNING
Fuel hazard
The fuel (petrol and oil) is extremely flammable
and petrol fumes can explode when ignited,
causing serious injury or death.
►
Protect your skin from contact with the fuel.
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Never remove the filler cap and never fill the
fuel tank when the machine is hot.
►
Never smoke when filling the fuel tank or when
working with the machine or servicing it.
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Avoid spilling fuel and wipe off any fuel spilled
on the machine.
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Fill the fuel tank outdoors or in a clean and well
ventilated place, free from sparks and open
flames.
Filling procedure
1. Stop the engine and let it cool down before
filling the tank.
2. The machine must be in the upright position
when filling with fuel.
3. Release the filler cap slowly to let any pressure
escape.
4. Never overfill the tank.
5. Make sure that the filler cap is screwed on
when the machine is used.
Working tool
CAUTION
Hot working tool
The tip of the working tool can become hot and
sharp when used. Touching it can lead to burns
and cuts.
►
Never touch a hot or sharp working tool.
►
Wait until the working tool has cooled down
before carrying out maintenance work.
NOTICE
Never cool a hot working tool in water, it
can result in brittleness and early failure.
Checking for wear on the tool shank
108mm
22mm
Use the gauge that corresponds to the working
tool’s shank dimension. See section "Technical
data" for correct tool shank dimensions.
Fitting and removing the working tool
Whenever fitting or removing the working tool the
following instructions must be observed:
COBRA COMBI
Safety and operating instructions
© Atlas Copco Airpower | 9800 0955 01 | 2018-01-01
Original instructions
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