Atlas Copco Cobra mk1 User manual

Cobra mk1
The hardest-hitting gasoline-powered breaker

44 foot pounds
of impact energy
Hitting at an incredible 44 foot pounds, the Cobra mk1 offers
the same power-to-weight ratio as many pneumatic or hydraulic
breakers. That’s almost twice the impact energy of other gasoline-
powered breakers.
Low vibration levels
Yet despite the high impact energy, vibration levels are reduced
due to a unique, patented vibration dampening system.
High productivity
High percussive energy, in combination with high percussive
frequency, means you get the job done faster. Add them up, and
you’ll see why the Cobra mk1 is the most productive gasoline-
powered breaker on the market.
Whatever the job
There are of course no compressors, hoses or cables to set up
with a gasoline breaker making it ideal for smaller jobs. And with
an extensive range of tools, you can use the Cobra mk1 for every-
thing from cutting and breaking, to driving and compacting.
You can use the Cobra mk1 to:
nbreak concrete
ncut asphalt
ndig
ndrive posts and fences
ndrive rods and spikes
ntamp and compact soil
ntamp ballast/ties
Digging BreakingTamping
Cutting

Technical Data
Weight Length Depth
Width over
handles Sound level Vibration level
lb in in in (Acc. to ISO 3744) (Acc. to ISO 8662)
55 36.48 13.02 24.04 109 dB 2.3m/s2
Model Tool Shank Part number
in
Cobra mk1 1 1/4” x 6” 8318 0700 03
Cobra mk1 1 1/8” x 6” 8318 0700 07
Capacity
Impact energy Impact rate
foot pounds bpm
40-44 (at 1440 bpm) 720-1440
Engine
Type Power Cooling system Starter system
Recommended
fuel Oil type Oil mix Fuel capacity Fuel consumption
90 cc single cylinder
two-stroke
2.7 hp
(at 5800 rpm)
Fan cooled Recoil starter gas, 90-100 octane
leaded or unleaded
Atlas Copco two-
stroke oil or similar
2% (1:50) 0.26 US gallon 0.34 US gallon/hour
Vibro-reduction
The patented vibration-
dampening system features
leaf springs rather than
rubber bushings or
spiral springs.
Easy to start
With a decompression valve
and electronic ignition, the
Cobra mk1 is easy to start.
Ships complete with
Chuck and shank templates,
replacement spark plug and
starter rope, 1 liter oil, owner's,
spare parts and safety manuals,
and CE declaration.
Low emissions
The Cobra mk1 meets tough
emission requirements, and has
been EPA 1-approved.
Hand and arm protection
Atlas Copco’s unique Hand and Arm
Protection System (HAPS) reduces the
negative effects of harmful vibrations.
Long lifetime
The high capacity air filter
ensures a long working
lifetime, even when large
quantities of dust and airborne
particles are present. It’s easy
to get to the air filter for quick
and easy servicing.
Low noise
An effective silencer ensures
that the Cobra mk1 meets
the current European Noise
Emission Directive (NED).
Easy to transport
The Cobra mk1 weighs just 55 pounds and fits easily
into car trunks. A wooden transport box is available.

Atlas Copco Construction Tools Inc.
37 Capital Drive, West Springfield MA 01089
Tel [phone] Fax [phone]
www.atlascopco.com/cto
Description Shank Blade Size Working Length Weight Part Number
(in) (in) (in) (lbs)
1Moil Point 1 1/8 x 6 14 6 3083 3267 00
18 7 3083 4015 10
24 9 3083 4015 20
36 12 3083 4015 30
1 1/4 x 6 14 7 3083 3285 00
18 8 3083 4000 10
24 11 3083 4000 20
36 15 3083 4000 30
2Narrow Chisel 1 1/8 x 6 14 6 3083 3268 00
18 7 3083 4016 10
24 9 3083 4016 20
36 12 3083 4016 30
1 1/4 x 6 14 7 3083 3286 00
18 8 3083 4001 10
24 11 3083 4001 20
36 15 3083 4001 30
3Wide Chisel 1 1/8 x 6 3 x 2 15 7 3083 3289 00
3 x 2 18 8 3083 4017 00
3 x 2 24 10 3083 4017 10
3 x 2 36 15 3083 4017 20
1 1/4 x 6 3 x 2 15 8 3083 3295 00
3 x 2 18 10 3083 4002 00
3 x 2 24 12 3083 4002 10
3 x 2 36 18 3083 4002 20
4Asphalt Cutter 1 1/8 x 6 5 x 6 13 9 3083 3292 00
1 1/4 x 6 5 x 6 13 9 3083 3298 00
5Digging Chisel 1 1/8 x 6 3 x 9 15 9 3083 3297 00
1 1/4 x 6 3 x 9 15 9 3083 3921 00
6Clay Spade 1 1/8 x 6 5.5 x 9 15 12 3083 3299 00
1 1/4 x 6 5.5 x 9 15 10 3083 3293 00
7Frost Wedge 1 1/8 x 6 2 x 12 16 11 3083 3294 00
1 1/4 x 6 2 x 12 16 12 3083 3300 00
8
Shank for
Tamping pad* 1 1/8 x 6 9 4 3083 3269 00
1 1/4 x 6 9 5 3083 3287 00
9Tamping pad* 7 (diameter) 16 3083 3301 00
6 x 6 18 3083 3302 00
* choose shank size appropriate for your mk1 model (item 8)
A tool for every job
At Atlas Copco, we maintain a comprehensive range
of chisels so that you can select the right tool for
the job.
Atlas Copco chisels are among the hardest
wearing on the market. A controlled heat treat-
ment process imparts both strength and high wear
resistance to deep surface layers while maintaining a highly
shock resistant central core to resist breakage.
The striking face is end-milled resulting in better con-
tact between the piston and the tool, improved transfer of
energy, as well as less vibration and wear on both hammer
and chisel.
1. Moil point
2. Narrow chisel
3. Wide chisel
4. Asphalt cutter
5. Digging chisel
7. Frost wedge
8. Shank for
tamping pad*
9. Tamping pad*
6. Clay spade
Accessories
Description Size Part number
Gloves, gel-filled, general XL 9800 0070 01
XXL 9800 0098 01
Gloves, gel-filled, summer L 9800 0434 01
XL 9800 0435 01
Gloves, gel-filled, winter L 9800 0290 01
XL 9800 0291 01
2-stroke oil 1.0 litre / 0.26 gallon 9238 2743 50
Cart 9234 0006 54
Transport box 9234 0009 91
Use only authorized parts. Any damage or malfunction caused by the use of unauthorized parts is not
covered by Warranty or Product Liability.
Tools
9245 9996 78a 7/06 X,000 Copyright © 2005, Atlas Copco Construction Tools Inc.