15
Cobra Combi & Standard
© 2005 Atlas Copco Construction Tools AB
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No 9800 0636 90
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2005-09-16
Safety and operating instructions
Tool chuck
If the chuck gauge provided can be inserted
fully across the flats of the hexagonal chuck, this
indicates that the chuck is worn out and must be
replaced.
Carburettor
On delivery the carburettor is adjusted and locked
so it meets EPA’s exhaust-gas standard.
The carburettor nozzle does not normally need to
be adjusted.
Normal setting:
Main nozzle (Cobra Combi Fe-cyl) (1) ........... 1,8 turns open
Idling nozzle (Cobra Combi Fe-cyl) (2) ........... 2,1 turns open
Main nozzle (1) ............................................... 2,0 turns open
Idling nozzle (2) .............................................. 2,0 turns open
When loaded, the maximum revs should be
2500–2650 rpm. The idling revs should be
1600–1800 rpm.
Trouble shooting
If the engine does not start, is difficult to start, runs
unevenly or has poor output, check the points
mentioned below (See image under "Main parts").
Check that the Stop button (See C under
"Starting and stopping") is in the ON position.
Check the fuel level.
Check the spark plug’s electrode distance.
Check that the air filter is not blocked.
Check that the fuel filter (See U under "Main
parts") is not blocked.
If the machine still does not work satisfactorily
following this procedure, please contact your
nearest authorised Atlas Copco workshop.
Scrapping worn-out
machines
Worn-out machines must be dealt with and
deposited in such a way that the maximum amount
of material can be recycled and the environment is
affected as little as possible.
Note:
Before a motor-driven drill is deposited
or thrown-away it must be emptied and
cleaned of petrol. Remaining petrol must
be dealt with in a way which not affects the
environment.
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