10
Cobra Combi & Standard
© 2005 Atlas Copco Construction Tools AB
|
No 9800 0636 90
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2005-09-16
Safety and operating instructions
OPERATING
INSTRUCTIONS
Design and function
Cobra Combi is a combined drilling and
hammering machine. It is equipped to be used
for breaking asphalt and concrete and for drilling
in concrete and granite.
Cobra Standard is not a combined machine and
is designed for breaking only.
Main parts
A Choke
B Throttle lever
C Vibration-dampened handle
D Engine piston
E Silencer
F Intake valve for flushing air
G Compression chamber for flushing air
H Rotation mechanism
I Tool retainer
J Air filter cover
K Tank cap
L Starting handle
M Power take-off (PTO)
N Spark plug cover
O Percussion piston
P Gas duct
Q Gas duct valve
R Function selector (Cobra Combi)
S Venturi
T Stop-button
U Fuel filter
Preparations before starting
Tool shank
Use a shank gauge to check that the tool shank is of the
correct size, i.e. H 22x108 mm (7/8” x 4 1/4”). The shank
must be clean and the tool must be in good condition.
Fuel
Cobra Combi and Standard use a mixture of petrol and
two-stroke oil, 1 part oil to 50 parts petrol (2%).
Two-stroke oil
For the best lubricating results use Atlas Copco’s
environmentally friendly two-stroke oil, which
has been specially developed for Atlas Copco’s
petrol motor-driven 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 two-stroke motors (not two-stroke oil
for outboard motors). Contact your nearest Atlas
Copco representative for advice on the correct
two-stroke oil.
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