Atlas Copco Cobra Combi User manual

© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
COBRA COMBI
COBRA
Overhauling instructions
Petrol drills and breakers
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Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com

www.CrowderSupply.com • Toll Free: 888-883-5144
Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com

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COBRA COMBI
© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Contents
ABOUTTHEOVERHAULINGINSTRUCTIONS.................................... 5
SAFETY INSTRUCTIONS . .....................................................6
SYMBOLS . . ...............................................................11
SPECIAL TOOLS. . ..........................................................13
DISASSEMBLY . . ...........................................................14
Sparkplug................................................................14
Topcover.................................................................14
Frontcover................................................................14
Filtercassette .............................................................15
Startercover ..............................................................15
Backcover................................................................16
Bracket...................................................................16
Fueltank..................................................................16
Clucht,complete...........................................................17
Carborettor................................................................18
Readvalve................................................................18
Handlesandtubecover.....................................................19
Handlebar................................................................20
Handle springs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Drillhousing,complete......................................................21
Drawbolt .................................................................22
Enginepiston..............................................................23
Flywheel..................................................................23
Electronicunitandinductioncoil.............................................24
Crankshaft................................................................24
Muffler....................................................................26
Cylinder, complete. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Hammerpiston ............................................................29
Pistonguide...............................................................30
Ratchethousing ...........................................................31
Drillchuck ................................................................32
Drillhousing...............................................................33
ASSEMBLY . . ..............................................................35
Drillhousing...............................................................35
Drillchuck ................................................................37
Ratchet...................................................................37
Hammerpiston ............................................................38
Drillfunction ..............................................................39
Cylinder ..................................................................39
Crankcaseandcrankshaft...................................................40
Crankcasecover...........................................................41
Inductioncoil..............................................................41
Electronicunit.............................................................42
Flywheel..................................................................42
Enginepiston..............................................................43
Drawbolt .................................................................43
Handle springs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Handlebar................................................................47
Handleandwiring..........................................................49
Carburettor................................................................50
Clutch....................................................................52
Fueltank..................................................................52
CONTENTS
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COBRA COMBI
© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Contents
Bracket...................................................................53
Back cover . . ..............................................................53
Startcover................................................................54
Filtercassette .............................................................56
Frontcover................................................................56
Topcover.................................................................56
Sparkplug................................................................56
TEST RUN . . ...............................................................57
Startpreparations..........................................................58
Settingnozzle .............................................................58
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COBRA COMBI
5© 2006 Atlas Copco Construction Tools AB
| No. 9800 0656 01 | 2006-10-01
ABOUT THE OVERHAULING INSTRUCTIONS
The aim of these instructions is to provide you with knowledge of how to make basic
overhauling on CobraCombi.
Only qualified and trained persons may operate or maintain the machine. Use only
authorized parts. Any damage or malfunction caused by the use of unauthorized parts
is not covered by Warranty or Product Liability.
For major service to the machine, contact your nearest authorized Atlas Copco
workshop.
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6 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
SAFETY INSTRUCTIONS
To reduce risk of serious injury or death to yourself
or others, read these safety instructions before
operating the machine.
Post these safety instructions at work locations,
provide copies to employees, and make sure that
everyone reads the safety instructions before
operating or servicing the machine.
Comply with all safety regulations.
Safety symbols used
The indications Danger, Warning and Caution
have the following meanings:
Danger Indicates an imminently
hazardous situation which,
if not avoided, will result in
death or serious injury.
Warning Indicates a potentially
hazardous situation which,
if not avoided, could result
in death or serious injury.
Caution Indicates a potentially
hazardous situation which,
if not avoided, may result
in minor or moderate
injury.
Machine and tool operating
hazards
Warning
Sudden or unexpected movement of the machine
may occur during operating, which may cause
injuries. In addition loosing your balance or slipping
may cause injury. To reduce such risks:
Make sure that you always keep a stable
position with your feet as wide apart as your
shoulder width, and keep a balanced body
weight.
Stand firmly and always hold on to the machine
with both hands.
Do not start the machine when it is laying on the
ground.
Make sure that the handles are clean and free of
grease and oil.
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Warning
Unintended start of the machine may cause injury.
Keep your hands away from the start and stop
device until you are about to start work.
Warning
The insertion tool is exposed to heavy strains
when the machine is used and after a certain
amount of use the tool may break due to fatugue.
If the tool breaks, there may be sudden or strong
movements. Such sudden or strong movements
may cause serious injury.
Make sure that you always keep a stable
position with your feet as wide apart as your
shoulder width, and keep a balanced body
weight.
Keep your feet away from the insertion tool.
Do not ’ride’ on the machine with one leg over
the handle, since you could be seriously injured
if the tool suddenly were to break.
Check regulary for any wear on the insertion
tool, and if there are any risks of damages or
fractures.
Do not use worn out or damaged insertion tools.
Warning
Incorrrect dimension of the insertion tool's shank
can result in that the insertion tool may be dropped
or ejected. A dropped or ejected insertion tool can
cause personal injury.
Before the insertion tool is mounted, make sure
that the shank is correct for the machine.
An insertion tool without a collar should not be
used.
Warning
If the insertion tool retainer on the machine is not in
a locked position, the tool can be ejected with great
force, which can cause serious injury.
After the insertion tool is mounted and locked,
the lock function must be checked by pulling the
insertion tool powerful.
Make sure that the tool is fully inserted and the
tool retainer is in a locked position before the
machine is started.
Warning
Changing the inserted tool while the machine is
running may cause serious injury.
Before changing the insertion tool, always stop
the machine and close down the machine by
pushing the start and stop device.
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7© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions
COBRA COMBI
Warning
The exhaust pipe and the bottom of the machine
can become very hot during operation, and
can remain hot during a period of time after the
machine has been shut off.
To reduce the risk of burns or related injuries,
avoid contact with the exhaust pipe or the
bottom of the machine.
Warning
If the drill steel gets caught during operation, the
whole machine will start to rotate if you lose your
grip. Such an unexpected rotation of the entire
machine may cause serious injury.
Stand firmly and always hold the machine with
both hands.
Make sure that the handles are clean and free
of grease and oil.
Never drill in an old hole.
Warning
There is a risk of objects getting dragged into or
getting caught by a rotating drill steel. This may
cause serious injury.
Never grab or touch a rotating drill steel.
Avoid wide cloths that may get caught.
If you have long hair, cover with a hair net.
Fume and exhaust hazard
Danger
The exhaust fumes from the machine’s combustion
engine contain carbon monoxide which is
poisonous. Inhalation of exhaust fumes can cause
serious injury or death.
Do not inhale exhaust fumes.
Never operate the machine indoors or in poorly
ventilated areas.
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Explosion and fire hazard
Danger
If the machine comes in contact with explosives,
an explosion may occur. Explosions may cause
serious injury or death.
To reduce risk of explosion:
Never drill or operate the equipment near
any explosives, including dynamite or other
explosives in the rock.
Make sure that there are no explosives in the
rock.
Never break or drill in an old hole.
Warning
Breaking, drilling and working with certain
materials can cause sparks, which may ignite
explosive gases which can cause explosions.
Explosions may cause serious injury or death.
To reduce risk of explosion:
Never operate the equipment in any explosive
environments.
Do not use the machine near flammable
materials, fumes or dust.
Make sure that there are no undetected sources
of gas.
Warning
During operation of the machine, the exhaust pipe
gets very hot and may stay hot for a period of time
even after you have shut off the engine. Materials
that come in contact with a hot exhaust pipe may
ignite and cause fire or explosion, which can cause
serious injury. To reduce risk of fire or explosion:
Do not use the machine near flammable
materials, fumes or dust. During breaks in
work, remember not to place the machine near
flammable materials.
Do not operate the machine in explosive
environments.
Keep the workplace clean and free from foreign
objects.
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8 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
Explosion and fire hazard,
continued
Warning
Fuel is highly flammable, and its vapors can
explode if ignited, which can cause serious injury
or death. To reduce risk of fire or explosion:
Store fuel only in containers that are specifically
designed and approved for storage of fuel.
Empty fuel containers must be properly taken
care of and sent back to the retailer.
Operate the machine with the fuel cap securely
in place. Never remove the fuel cap or add fuel
when the engine is hot. Stop the engine and
allow it to cool before adding fuel. When opening
the fuel cap, always loosen the cap slowly to
relieve any pressure in the tank. Do not overfill
the tank.
Always mix and add fuel in a clean and well-
ventilated area. Make sure that this outdoor area
is free from any flames or sparks. Never smoke
while fuelling, mixing fuel, operating or servicing
the machine. Avoid spilling fuel. Wipe up any
fuel that is spilled on the machine. Fill the tank
at least ten meters (30 feet) away from where
you intend to use the machine.
Do not use a machine that is leaking fuel.
Regularly check for any leakage.
To minimize the risk of fuel leakage during
transportation, secure that the machine is in an
upright position during transportation.
Do not use the machine near flammable
materials, fumes or dust. During breaks in
work, do not place the machine near flammable
materials.
Do not operate the machine near any materials
that create sparks. Remove all hot objects
and objects that create sparks prior to using
machine.
Do not operate the machine in an explosive
environment.
Protect your skin from contact with fuel.
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Electrical/Concealed object
hazards
Warning
The machine is not electrically insulated. If the
machine comes in contact with electricity, serious
injuries or death may result.
To reduce the risk of injury or death, never drill
or break near any electric wire or other source of
electricity.
Make sure that there are no concealed wires or
other sources of electricity.
Warning
During drilling and breaking, concealed wires and
pipes constitute a danger that can result in serious
injury.
Before you start drilling or breaking, check the
composition of the material you are to work on.
Watch out for concealed electrical wiring, water,
sewage and gas pipes and phone lines.
If the tool seems to have hit a concealed object,
immediately switch off the machine.
Make sure that there is no danger before
continuing.
Projectile hazard
Warning
During breaking, drilling or hammering, splinters or
other particles of rock may become projectiles and
cause bodily injury by striking the operator or other
persons.
Use approved personal protective equipment,
including impact resistant safety glasses with
side protection, to reduce the risk of being
injured by a projectile.
Noise hazard
Warning
High sound levels may cause permanent hearing
loss.
Use hearing protection in accordance with
occupational health and safety regulations.
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9© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions
COBRA COMBI
Silica/Dust hazard
Warning
Exposure to crystalline silica (sometimes called
“silica dust”) as a result of breaking, drilling, or
hammering of rock, concrete, asphalt or other
materials may cause silicosis (a serious lung
disease), silicosis-related illnesses, cancer, or
death. Silica is a major component of rock, sand
and mineral ores.
To reduce silica exposure:
Use proper engineering controls to reduce the
amount of silica in the air and the build-up of
dust on equipment and surfaces. Examples of
such controls include: exhaust ventilation and
dust collection systems, water sprays, and wet
drilling. Make sure that controls are properly
installed and maintained.
Wear, maintain, and correctly use approved
particulate respirators when engineering controls
alone are not adequate to reduce exposure
below permissible levels.
Participate in air monitoring, medical exams,
and training programs offered by your employer
and when required by law.
Wear washable or disposable protective clothes
at the worksite; shower and change into clean
clothes before leaving the worksite to reduce
exposure of silica to yourself, other persons,
cars, homes, and other areas.
Do not eat, drink, or use tobacco products in
areas where there is dust containing crystalline
silica.
Wash your hands and face before eating,
drinking, or using tobacco products outside of
the exposure area.
Work with your employer to reduce silica
exposure at your worksite.
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Warning
Some dust or other airborne material created
during use of the machine may contain
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm. Some examples of such
chemicals are:
Crystalline silica and cement and other masonry
products.
Arsenic and chromium from chemically-treated
rubber.
Lead from lead based paints.
To reduce your exposure to these chemicals,
work in a well ventilated area, and work with
approved safety equipment, such as dust masks
that are specially designed to filter out microscopic
particles.
Vibration hazard
Warning
Repetitive tasks, awkward working positions or
vibrations may cause injury to your fingers, hands,
arms, and other body parts. Exposure to vibrations
may restrict blood supply to the hands and fingers,
which may cause injury. If numbness, tingling,
pain, whitening of the skin, or reduction in feeling
occurs when you use the machine, or even when
you are not using the machine, do not use the
machine and contact a physician.
The inserted tool creates vibrations that may cause
injury. Do not grab, hold, or touch the tool when
using the machine.
Machine modification hazard
Warning
Any machine modification may result in bodily
injuries to yourself or others.
The hydraulic breaker must not be modified.
Use only original parts and accessories
approved by Atlas Copco.
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10 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
Additional safety instructions
Machines and accessories must only be used
for their intended purpose.
Only qualified and trained persons may operate
or maintain the machine.
Keep your hand away from the start and stop
device until work is to begin.
Learn how the machine is switched off in the
event of an emergency.
The machine should be operated at reduced
power when drilling is started.
Release the start and stop device in case of
interruption of the energy supply.
Always inspect the equipment prior to use.
Do not use equipment if you suspect that it
could be damaged.
Check the insertion tools for wear or damages
at regular intervals. Do not use worn out or
damaged insertion tools.
Always use your common sense and good
judgment.
Do not use the machine when you are tired or
under the influence of drugs, alcohol or anything
else that may affect your vision, reactions or
judgement.
Participate in safety and training courses.
Never strike or abuse any equipment.
Keep the machine and tools in a safe and locked
place out of reach of children.
Make sure that the all attached and related
equipment is properly maintained.
Signs and stickers that are important for your
safety and the care of the machine are included
with every machine. New signs and stickers can
be ordered using the spare parts list.
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Protective equipment
Always use approved personal protective
equipment. Operators and other persons in the
work area must wear protective equipment,
including at a minimum:
Protective helmet
Hearing protection
Impact resistant eye protection with side
protection
Respiratory protection when appropriate
Protective gloves
Protective boots
Service and maintenance
Regular maintenance is a prerequisite for keeping
the machine a safe tool. Carefully follow the
operating instructions.
Use only authorized parts. Any damage or
malfunction caused by the use of unauthorized
parts is not covered by Warranty or Product
Liability.
Change damaged parts immediately.
Replace damaged and worn out components in
good time.
For major service to the machine, contact your
nearest authorized Atlas Copco workshop.
When cleaning mechanical parts with solvent,
make sure that current health and safety
regulations are complied and that the ventilation
is satisfactory.
Machine tools
Keep the tools clean and in a good condition.
Check tools regulary and make sure that they
are sharp.
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Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com

Symbols
COBRA COMBI
11© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
SYMBOLS
!
Warning, Caution Directions
Inspect and if necessary, replace
damaged or worn out parts
Replace with a new part Do not to do this! In working order
Force, power Turn to the end position Use Oil
243
Use Loctite 243 Check the hose Scrap and replace with new part
Indicator instrument Thickness gauge Noice
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Symbols COBRA COMBI
12 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Feeler gauge Check for cracks Use grease
Freezed, very cold Tighten with this torque Recycle this part
>
Bigger than
<
Smaller than Time
Important positional relationship In turn Wear safety glasses and gloves
Clean carefully Earth Go to step
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Special Tools
COBRA COMBI
13© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
SPECIAL TOOLS
1. Torque wrench 0 - 100 Nm
2. Flywheel puller. Ordering No. 9238 2700 51
3. Drift for collet. Ordering No. 9238 2713 70
4. Drift for piston pin bearing. Ordering No. 9238 2704 30
5. Drift for main bearing. Ordering No. 9238 2707 10
6. Drift for piston pin. Ordering No. 9238 2706 70
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14 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
DISASSEMBLY
Warning
Fuel is highly flammable, and its vapors can
explode if ignited, which can cause serious
injury or death.
Be very careful when handling fuel.►
1.
3.
Spark plug
2.
Top cover
Front cover
4.
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15© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions
COBRA COMBI
5.
6.
8.
9.
Filter cassette
Starter cover
Warning
Rewinding or replacing the starter spring
uncarefullly can cause serious eye and hand
damages.
Always wear protective glasses and industrial
grade gloves when rewinding or replacing the
starter spring.
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16 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
10.
12.
Back cover
Bracket
11.
Fuel tank
13.
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17© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions
COBRA COMBI
14.
15.
16.
17.
18.
19.
Clucht, complete
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18 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
20.
21.
22.
23.
24.
25.
Carborettor Read valve
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19© 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions
COBRA COMBI
26.
28.
29.
Handles and tube cover
27.
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20 © 2006 Atlas Copco Construction Tools AB | No. 9800 0656 01 | 2006-10-01
Overhauling instructions COBRA COMBI
30.
31.
32.
33.
34.
Handle bar
Handle springs
35.
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