APT MHC 5 Quick start guide

Safety & Operating
Instructions
Handheld Core Drill
MHC 5
AMERICAN PNEUMATIC TOOLS

MHC 5
2(doc no.)
SAFETY & OPERATING INSTRUCTIONS
3392 5164 01c2
5, 15

MHC 5
3(doc no.)
SAFETY & OPERATING INSTRUCTIONS
3392 5164 01c2
5, 15
ENGLISH
Contents
Introduction.......................................................................5
About the Safety and operating instructions.......................................5
Safety instructions.................................................................6
Safety signal words................................................................6
Personal precautions and qualifications..............................................6
Installation, precautions............................................................6
Operation, precautions............................................................6
Maintenance, precautions.........................................................11
Storage, precautions..............................................................11
Overview.........................................................................12
Design and function..............................................................12
Main parts......................................................................12
Labels..........................................................................12
Installation.......................................................................13
Hoses...........................................................................13
Quick-release couplings...........................................................14
Hydraulic oil ....................................................................14
Pressure adjustment..............................................................14
Water flushing...................................................................14
Drill bit.........................................................................14
Operation........................................................................15
Preparations before starting.......................................................15
Start and stop...................................................................15
Operating.......................................................................15
When taking a break..............................................................16
Maintenance.....................................................................16
Every day.......................................................................16
Periodic maintenance.............................................................16
Storage...........................................................................16
Disposal..........................................................................16
Technical data....................................................................17
Troubleshooting.................................................................17
Machine data....................................................................17
Noise and vibration data..........................................................18
Noise and vibration declaration statement...........................................18
EC Declaration of Conformity.....................................................19
EC Declaration of Conformity (EC Directive 2006/42/EC)..............................19
3392 5192 90a | Original instructions4
COR 5, 15Contents

MHC 5
4(doc no.)
SAFETY & OPERATING INSTRUCTIONS

MHC 5
5(doc no.)
SAFETY & OPERATING INSTRUCTIONS
Introduction
Thank you for choosing American Pneumatic Tools brand products. For
nearly a century, the American Pneumatic Tools brand has represented
performance and innovation in the pneumatic tool industry.
Today the brand is found around the world on a range of pneumatic
and hydraulic tools that includes breakers, rock drills, chipping
hammers, clay-diggers, busters, scalers, rollers, generators,
compressors, pumps and a whole lot more.
The American Pneumatic Tools brand is associated with powerful and
reliable products that are easy to maintain and that give good value for
the money.
For more information please visit www.apt-tools.com
About the Safety and operating
instructions
The aim of the instructions is to provide you with knowledge of how to
use the core drill in an efficient, safe way. The instructions also give you
advice and tell you how to perform regular maintenance on the core
drill.
Before using the core drill for the first time you must read these
instructions carefully and understand all of them.

MHC 5
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SAFETY & OPERATING INSTRUCTIONS
Safety instructions
To reduce the risk of serious injury or death to
yourself or others, read and understand the Safety
and operating instruction before installing,
operating, repairing, maintaining, or changing
accessories on the machine.
Post this Safety and operating instruction at work
locations, provide copies to employees, and make
sure that everyone reads the Safety and operating
instruction before operating or servicing the
machine.
In addition, the operator or the operator's employer
must assess the specific risks that may be present as
a result of each use of the machine.
Safety signal words
The safety signal words Danger, Warning and
Caution have the following meanings:
Indicates a hazardoussituation
which, if notavoided,willresult
in death or serious injury.
DANGER
Indicates a hazardoussituation
which, if not avoided, could
result in death or seriousinjury.
WARNING
Indicates a hazardoussituation
which, if not avoided, could
result in minor or moderate
injury.
CAUTION
Personal precautions and
qualifications
Only qualified and trained persons may operate or
maintain the machine. They must be physically able
to handle the bulk, weight, and power of the tool.
Always use your common sense and good
judgement.
Personal protective equipment
Always use approved protective equipment.
Operators and all other persons in the working 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
>Proper protective boots
>Appropriate work overall or similar clothing (not
loose-fitting) that covers your arms and legs.
Drugs, alcohol or medication
WARNING Drugs, alcohol or medication
Drugs, alcohol or medication may impair your
judgment and powers of concentration. Poor
reactions and incorrect assessments can lead to
severe accidents or death.
►Never use the machine when you are tired or
under the influence of drugs, alcohol or
medication.
►No person who is under the influence of drugs,
alcohol or medication may operate the machine.
Installation, precautions
WARNING Moving or slipping insertion
tool
An incorrect dimension of the inserted tool’s shank
can result in that the inserted tool is lost or is slipping
out during operation. Risk of severe injury or crushed
hands and fingers.
►Check that the insertion tool has the shank length
and dimensions that the machine is intended for.
►Never use an insertion tool without a collar.
CAUTION Moving parts
Risk for crushed hands and fingers.
►Never check bores or passages with hands or
fingers.
Operation, precautions
DANGER Explosion hazard
If a warm insertion tool comes into contact with
explosives, an explosion could occur. During
operation with certain materials as well as use of
certain materials in machine parts, sparks and
ignition can occur. Explosions will lead to severe
injuries or death.
►Never operate the machine in any explosive
environment.
►Never use the machine near flammable materials,
fumes or dust.
►Make sure that there are no undetected sources
of gas or explosives.

MHC 5
7(doc no.)
SAFETY & OPERATING INSTRUCTIONS
►Never drill in an old hole.
WARNING Unexpected movements
The inserted tool is exposed to heavy strains when
the machine is used. The inserted tool may break
due to fatigue after a certain amount of use. If the
inserted tool breaks or gets stuck, there may be
sudden and unexpected movement that can cause
injuries. Furthermore, losing your balance or slipping
may cause injury.
►Make sure that you always keep a stable position
with your feet as far apart as your shoulder width,
and keeping a balanced body weight.
►Always inspect the equipment prior to use. Never
use the equipment if you suspect that it is
damaged.
►Make sure that the handles are clean and free of
grease and oil.
►Keep your feet away from the inserted tool.
►Stand firmly and always hold on to the machine
with both hands.
►Never drill in an old hole.
►Never start the machine when it is lying on the
ground.
►Never ‘ride’on the machine with one leg over the
handle.
►Never strike or abuse the equipment.
►Check regularly for wear on the insertion tool,
and check whether there are any signs of damage
or visible cracks.
►Pay attention and look at what you are doing.
WARNING Stalling hazard
If the insertion tool gets caught during operation,
the whole machine will start to rotate if you lose
your grip on it. This unexpected rotation of the entire
machine may cause serious injury or death.
►Stand firmly and always hold onto the machine
with both hands.
►Make sure that the handle or handles are clean
and free from grease and oil.
►Never drill in an old hole.
WARNING Trapping hazard
There is risk of neck ware, hair, gloves and clothes
getting dragged into or caught by a rotating
insertion tool or accessories. This may cause choking,
scalping, lacerations or death. To reduce the risk:
►Never grab or touch a rotating drill steel.
►Avoid wearing clothing, neck ware or gloves that
may get caught.
►Cover long hair with a hair net.
73392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

MHC 5
8(doc no.)
SAFETY & OPERATING INSTRUCTIONS
WARNING Dust and fume hazard
Dusts and/or fumes generated or dispersed when
using the machine may cause serious and permanent
respiratory disease, illness, or other bodily injury (for
example, silicosis or other irreversible lung disease
that can be fatal, cancer, birth defects, and/or skin
inflammation).
Some dusts and fumes created by drilling, breaking,
hammering, sawing, grinding and other construction
activities contain substances known to the State of
California and other authorities to cause respiratory
disease, cancer, birth defects, or other reproductive
harm. Some examples of such substances are:
>Crystalline silica, cement, and other masonry
products.
>Arsenic and chromium from chemically-treated
rubber.
>Lead from lead-based paints.
Dust and fumes in the air can be invisible to the
naked eye, so do not rely on eye sight to determine
if there is dust or fumes in the air.
To reduce the risk of exposure to dust and fumes,
do all of the following:
►Perform site-specific risk assessment. The risk
assessment should include dust and fumes created
by the use of the machine and the potential for
disturbing existing dust.
►Use proper engineering controls to minimize the
amount of dust and fumes in the air and to
minimize build-up on equipment, surfaces,
clothing, and body parts. Examples of controls
include: exhaust ventilation and dust collection
systems, water sprays, and wet drilling. Control
dusts and fumes at the source where possible.
Make sure that controls are properly installed,
maintained and correctly used.
►Wear, maintain and correctly use respiratory
protection as instructed by your employer and as
required by occupational health and safety
regulations. The respiratory protection must be
effective for the type of substance at issue (and if
applicable, approved by relevant governmental
authority).
►Work in a well ventilated area.
►If the machine has an exhaust, direct the exhaust
so as to reduce disturbance of dust in a dust filled
environment.
►Operate and maintain the machine as
recommended in the operating and safety
instructions
►Select, maintain and replace consumables/
inserted tools/ other accessory as recommended
in the operating and safety instructions. Incorrect
selection or lack of maintenance of consumables/
inserted tools/ other accessories may cause an
unnecessary increase in dust or fumes.
►Wear washable or disposable protective clothes
at the worksite, and shower and change into clean
clothes before leaving the worksite to reduce
exposure of dust and fumes to yourself, other
persons, cars, homes, and other areas.
►Avoid eating, drinking, and using tobacco
products in areas where there is dust or fumes.
►Wash your hands and face thoroughly as soon as
possible upon leaving the exposure area, and
always before eating, drinking, using tobacco
products, or making contact with other persons.
►Comply with all applicable laws and regulations,
including occupational health and safety
regulations.
►Participate in air monitoring, medical examination
programs, and health and safety training
programs provided by your employer or trade
organizations and in accordance with
occupational health and safety regulations and
recommendations. Consult with physicians
experienced with relevant occupational medicine.
►Work with your employer and trade organization
to reduce dust and fume exposure at the worksite
and to reduce the risks. Effective health and safety
programs, policies and procedures for protecting
workers and others against harmful exposure to
dust and fumes should be established and
implemented based on advice from health and
safety experts. Consult with experts.
WARNING Projectiles
Failure of the work piece, of accessories, or even of
the machine itself may generate high velocity
projectiles. During operating, splinters or other
particles from the working material may become
projectiles and cause personal injury by striking the
operator or other persons. To reduce these risk:
►Use approved personal protective equipment and
safety helmet, including impact resistant eye
protection with side protection.
►Make sure that no unauthorised persons trespass
into the working zone.
►Keep the workplace free from foreign objects.
►Ensure that the work piece is securely fixed.
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COR 5, 15Safety and operating instructions

MHC 5
9(doc no.)
SAFETY & OPERATING INSTRUCTIONS
WARNING Splinters hazard
Using the insertion tool as a hand struck tool can
result in splinters hitting the operator and can cause
personal injury.
►Never use a insertion tool as a hand struck tool.
They are specifically designed and heat-treated to
be used only in a machine.
WARNING Slipping, tripping and
falling hazards
There is a risk of slipping or tripping or falling, for
example tripping on the hoses or on other objects.
Slipping or tripping or falling can cause injury. To
reduce this risk:
►Always make sure that no hose or other object is
in your way or in any other person's way.
►Always make sure you are in a stable position with
your feet as far apart as your shoulders width and
keeping a balanced body weight.
WARNING Motion hazards
When using the machine to perform work-related
activities, you may experience discomfort in the
hands, arms, shoulders, neck, or other parts of the
body.
►Adopt a comfortable posture whilst maintaining
secure footing and avoiding awkward
off-balanced postures.
►Changing posture during extended tasks may
help avoid discomfort and fatigue.
►In case of persistent or recurring symptoms,
consult a qualified health professional.
WARNING Hydraulic oil
Spilled hydraulic oil can cause burns, accidents due
to slippery conditions and will also harm the
environment.
►Take care of all spilled oil and handle it according
to your safety and environmental regulations.
►Never dismount the hydraulic machine when the
hydraulic oil is hot.
►Never run any hydraulic lines for attachment of
the hydraulic machine through the drivers cab.
WARNING Hydraulic oil at high
pressure
Thin jets of hydraulic oil under high pressure can
penetrate the skin and cause permanent damage.
►Immediately consult a doctor if hydraulic oil has
penetrated the skin.
►Never use your fingers to check for hydraulic fluid
leaks.
►Keep your face away from any possible leaks.
WARNING Vibration hazards
Normal and proper use of the machine exposes the
operator to vibration. Regular and frequent exposure
to vibration may cause, contribute to, or aggravate
injury or disorders to the operator’s fingers, hands,
wrists, arms, shoulders and/or nerves and blood
supply or other body parts, including debilitating
and/or permanent injuries or disorders that may
develop gradually over periods of weeks, months,
or years. Such injuries or disorders may include
damage to the blood circulatory system, damage to
the nervous system, damage to joints, and possibly
damage to other body structures.
If numbness, persistent recurring discomfort,
burning sensation, stiffness, throbbing, tingling,
pain, clumsiness, weakened grip, whitening of the
skin, or other symptoms occur at any time, when
operating the machine or when not operating the
machine, stop operating the machine, tell your
employer and seek medical attention. Continued
use of the machine after the occurrence of any such
symptom may increase the risk of symptoms
becoming more severe and/or permanent.
Operate and maintain the machine as recommended
in these instructions, to prevent an unnecessary
increase in vibration.
The following may help to reduce exposure to
vibration for the operator:
►Let the tool do the job. Use a minimum hand grip
consistent with proper control and safe operation.
►If the machine has vibration absorbing handles,
keep them in a central position, avoid pressing
the handles into the end stops.
►When the percussion mechanism is activated, the
only body contact with the machine you should
have are your hands on the handle or handles.
Avoid any other contact, for example supporting
any part of the body against the machine or
leaning onto the machine trying to increase the
feed force. It is also important not to keep the start
and stop device engaged while extracting the tool
from the broken work surface.
93392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

MHC 5
10 (doc no.)
SAFETY & OPERATING INSTRUCTIONS
WARNING Splinters hazard
Using the insertion tool as a hand struck tool can
result in splinters hitting the operator and can cause
personal injury.
►Never use a insertion tool as a hand struck tool.
They are specifically designed and heat-treated to
be used only in a machine.
WARNING Slipping, tripping and
falling hazards
There is a risk of slipping or tripping or falling, for
example tripping on the hoses or on other objects.
Slipping or tripping or falling can cause injury. To
reduce this risk:
►Always make sure that no hose or other object is
in your way or in any other person's way.
►Always make sure you are in a stable position with
your feet as far apart as your shoulders width and
keeping a balanced body weight.
WARNING Motion hazards
When using the machine to perform work-related
activities, you may experience discomfort in the
hands, arms, shoulders, neck, or other parts of the
body.
►Adopt a comfortable posture whilst maintaining
secure footing and avoiding awkward
off-balanced postures.
►Changing posture during extended tasks may
help avoid discomfort and fatigue.
►In case of persistent or recurring symptoms,
consult a qualified health professional.
WARNING Hydraulic oil
Spilled hydraulic oil can cause burns, accidents due
to slippery conditions and will also harm the
environment.
►Take care of all spilled oil and handle it according
to your safety and environmental regulations.
►Never dismount the hydraulic machine when the
hydraulic oil is hot.
►Never run any hydraulic lines for attachment of
the hydraulic machine through the drivers cab.
WARNING Hydraulic oil at high
pressure
Thin jets of hydraulic oil under high pressure can
penetrate the skin and cause permanent damage.
►Immediately consult a doctor if hydraulic oil has
penetrated the skin.
►Never use your fingers to check for hydraulic fluid
leaks.
►Keep your face away from any possible leaks.
WARNING Vibration hazards
Normal and proper use of the machine exposes the
operator to vibration. Regular and frequent exposure
to vibration may cause, contribute to, or aggravate
injury or disorders to the operator’s fingers, hands,
wrists, arms, shoulders and/or nerves and blood
supply or other body parts, including debilitating
and/or permanent injuries or disorders that may
develop gradually over periods of weeks, months,
or years. Such injuries or disorders may include
damage to the blood circulatory system, damage to
the nervous system, damage to joints, and possibly
damage to other body structures.
If numbness, persistent recurring discomfort,
burning sensation, stiffness, throbbing, tingling,
pain, clumsiness, weakened grip, whitening of the
skin, or other symptoms occur at any time, when
operating the machine or when not operating the
machine, stop operating the machine, tell your
employer and seek medical attention. Continued
use of the machine after the occurrence of any such
symptom may increase the risk of symptoms
becoming more severe and/or permanent.
Operate and maintain the machine as recommended
in these instructions, to prevent an unnecessary
increase in vibration.
The following may help to reduce exposure to
vibration for the operator:
►Let the tool do the job. Use a minimum hand grip
consistent with proper control and safe operation.
►If the machine has vibration absorbing handles,
keep them in a central position, avoid pressing
the handles into the end stops.
►When the percussion mechanism is activated, the
only body contact with the machine you should
have are your hands on the handle or handles.
Avoid any other contact, for example supporting
any part of the body against the machine or
leaning onto the machine trying to increase the
feed force. It is also important not to keep the start
and stop device engaged while extracting the tool
from the broken work surface.
93392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

MHC 5
11(doc no.)
SAFETY & OPERATING INSTRUCTIONS
►If the machine has a silencer, check that it is in
place and in good working condition.
►Always use hearing protection.
►Use damping material to prevent work pieces
from 'ringing'.
Maintenance, precautions
WARNING Machine modification
Any machine modification may result in bodily
injuries to yourself or others.
►Never modify the machine. Modified machines
are not covered by warranty or product liability.
►Always use original parts, insertion tools, and
accessories.
►Change damaged parts immediately.
►Replace worn components in good time.
CAUTION Hot insertion tool
The tip of the insertion tool can become hot and
sharp when used. Touching it can lead to burns and
cuts.
►Never touch a hot or sharp insertion tool.
►Wait until the insertion tool has cooled down
before carrying out maintenance work.
WARNING Insertion tool hazards
Accidental engagement of the start and stop device
during maintenance or installation can cause serious
injuries, when the power source is connected.
►Never inspect, clean, install, or remove the
insertion tool while the power source is
connected.
Storage, precautions
♦Keep the machine and tools in a safe place, out
of the reach of children and locked up.
113392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

MHC 5
12 (doc no.)
SAFETY & OPERATING INSTRUCTIONS
Overview
To reduce the risk of serious injury or death
to yourself or others, read the Safety
instructions section found on the previous
pages of this manual before operating the
machine.
Design and function
COR 5 and COR 15 are sturdy and reliable core drills
designed for working together with Atlas Copco
power packs. The core drills are small and flexible
machines with a high performance compared to the
weight.
The core drills are designed for water flushed
diamond drilling but can also be used for dry drilling
applications, which will not harm the seals. With
prolonged use in dry drilling applications, the
housing and shaft may become extremely warm. If
this occurs, remove the drill bit and run water
through the housing and shaft for one minute to
dissipate the built up heat.
The core drills can be used in drilling rigs. The
bearing housing is designed with a 60 mm cylindrical
surface that fits into industry standard drilling rig
mounting collars.
The directly driven hydraulic power design provides
consistent rotation and torque when drilling in
concrete, brickwork, or blocks for example. It also
makes underwater drilling possible. They are
designed for all kind of construction jobs. No other
use is permitted.
Never use the core drill as a rotation movement
supplier for other equipment.
To choose the correct insertion tool, see the spare
part list or the accessories catalogue.
The core drills are delivered with 2 m ⅜" tail-hoses
with ½" 'Flat-Face' quick-release couplings.
Main parts
A. Handle
B. Trigger
C. Adaptor
D. Breast plate
E. Pressure relief valve
F. Protection bracket
G. Handle ring
H. Front handle
I. Hydraulic hose
J. Water hose
K. Water valve
Labels
The machine is fitted with labels containing
important information about personal safety and
machine maintenance. The labels must be in such
condition that they are easy to read. New labels can
be ordered from the spare parts list.
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COR 5, 15Safety and operating instructions

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SAFETY & OPERATING INSTRUCTIONS
Data plate
Made in Bulgaria
F
D
CA
B
G
E
H
A. Maximum permitted hydraulic oil flow
B. Machine type
C. Maximum relief valve setting
D. The warning symbol together with the book
symbol means that the user must read the
safety and operating instructions before the
machine is used for the first time.
E. Serial number (is also stamped in the valve
housing).
F. The CE symbol means that the machine is
EC-approved. See the EC declaration which is
delivered with the machine for more
information.
G. Year of manufacture.
H. Maximum nominal operating pressure
Noise level label
WA
xxx
dB
The label indicates the guaranteed noise level
corresponding to EC-directive 2000/14/EC. See
"Technical data" for accurate noise level.
EHTMA category
The machine is clearly marked with EHTMA
categories. It is important that any power source
used is in a compatible category. If any doubt,
consult an authorised supervisor.
Safety label
RPM label
Installation
Hoses
For connection on the machine, the hydraulic hose
must be approved for a working pressure of at least
160 bar (2300 psi) and have a 12.7 mm (½ in.) inner
diameter. To resist exterior wear and tear, we
recommend using a 2-layer hydraulic hose. The
machine connection marked P (pump) is the oil inlet,
and the connection marked T (tank) is the oil outlet.
Always connect both hoses and make sure that all
hose connections are tight. Never carry the machine
by the hose.
133392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

MHC 5
14 (doc no.)
SAFETY & OPERATING INSTRUCTIONS
Quick-release couplings
The original hydraulic hoses are fitted with Flat-Face
quick-release couplings that are strong and easy to
clean. The quick-release couplings are fitted so that
the male connection supplies oil and the female
connection receives oil.
NOTICE Wipe all couplings clean before
connecting. Ensure that couplings are clean and
correctly engaged before operation. Failure to do so
may result in damage to the quick couplings and
cause overheating and cause foreign matter to enter
the hydraulic system.
Hydraulic oil
In order to protect the environment, Atlas Copco
recommends the use of biologically degradable
hydraulic oil. No other fluids must be used.
♦Viscosity (preferred) 20-40 cSt.
♦Viscosity (permitted) 15-100 cSt.
♦Viscosity index Min. 100.
Standard mineral or synthetic oil can be used. Make
sure to only use clean oil and filling equipment.
When the machine is used continuously, the oil
temperature will stabilise at a level which is called
the working temperature. This will, depending on
the type of work and the cooling capacity of the
hydraulic system, be between 20-40°C (68-104°F)
above the ambient temperature. At working
temperature, the oil viscosity must lie within the
preferred limits. The viscosity index indicates the
connection between viscosity and temperature. A
high viscosity is therefore preferred, because the oil
can then be used within a wider temperature range.
The machine must not be used, if oil viscosity fails
to remain within the permitted area, or if the
working temperature of the oil does not fall between
20°C (68°F) and 70°C (158°F).
Pressure adjustment
The maximum pressure of the power source is
important. The pressure created in case of an
incorrectly or unfitted return line coupling would
cause overloading. Which could harm the machine
and result in bodily injuries. The maximum pressure
of the power source is 160 bar (limited by safety
valve adjustment).
WARNING Operating pressure
If the maximum operating pressure for the hydraulic
machine is exceeded, it can result in material damage
and personal injury.
►Always run the hydraulic machine with the correct
operating pressure, see "Technical data".
►Only readjust the pressure relief valve (torque
control) on the machine according to procedure
and values described under maintenance. Note
that higher settings might lead to a higher torque,
which could harm the machine and result in
serious injury or death.
Water flushing
For diamond bit core drilling, water flushing is
required. Mount the water swivel and water hose
on the core drill as follows.
The water can be supplied directly from a source,
or a separate water kit can be used. A separate water
kit with pressure tank is available, see the spare parts
list.
Drill bit
Choosing drill bit
A correct drill bit is a condition for good operation.
To avoid unnecessary machine damage, it is
important to choose drill bits with a high quality.
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COR 5, 15Safety and operating instructions

MHC 5
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SAFETY & OPERATING INSTRUCTIONS
Fitting and removing the drill bit
Smaller diameter drill bits are fitted directly into the
machine drive shaft (½" BSP). For larger diameter
drill bits, use an ½" BSP male x 1¼ UNC male drive
adaptor, which is included with the machine.
To prevent an accidental start:
1) Switch off the power supply and disconnect
the machine from the power source.
2) Screw the drill bit into the machine.
3) Lock the spindle using a spanner and tighten
the drill bit.
4) Bleed the machine by pressing the start and
stop device.
NOTICE Never cool a hot insertion tool in water,
it can result in brittleness and early failure.
Operation
WARNING Involuntary start
Involuntary start of the machine may cause injury.
►Keep your hands away from the start and stop
device until you are ready to start the machine.
►Learn how the machine is switched off in the event
of an emergency.
►Stop the machine immediately in all cases of
power supply interruption.
NOTICE Never exceed the maximum flow for the
machine, as this might lead to failure of the drill bit
and damage to the machine.
Preparations before starting
Check the drilling equipment
♦Check that all of the drilling equipment is in a
good condition.
♦Inspect the hoses generally for signs of damage.
♦Check that the drill bit is in a good condition and
has the correct diameter for the size of the core
drill.
♦Clean all safety labels. Replace any that are
missing or cannot be read.
♦Ensure that the hydraulic couplings are clean and
fully serviceable.
♦Ensure that the fittings are tight and leak-proof.
♦Always use the core drill with a front handle
mounted, to absorb the reaction torque.
♦Screw the drill bit into the nose end drive of the
shaft and tighten by means of the spanner flats
provided.
♦Check that the core drill is not blocked and that
water flows through without obstruction.
♦Ensure that the power source to be used is
compatible with the machine model, see the
"Technical data".
♦Atlas Copco recommends using an LFD oil flow
divider, if the flow from the power source can
exceed the maximum allowed oil flow.
Start and stop
♦Start the machine by pressing the trigger while
firmly holding the handle. By gradually applying
pressure on the trigger, the speed may be reduced
to obtain a soft start.
♦Stop the machine by releasing the trigger. The
trigger returns automatically to the stop position.
When the work is done, stop the power source.
Disconnect the hoses and fit the protective caps
to the quick-release couplings.
Operating
Before drilling
1. Connect the hydraulic hoses.
2. Connect the water hose to the water tap.
3. Screw the handle lightly into the handle ring and
place the handle in a position that is comfortable
for the operator.
4. Lock the handle ring in this position by
tightening the handle to grip the bearing
housing. Ensure that the handle remains locked
throughout the drilling operation.
5. Start the power source.
6. Activate the water supply.
153392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

MHC 5
16 (doc no.)
SAFETY & OPERATING INSTRUCTIONS
Starting a cut
♦Stand steady and make sure that your feet and
hands are at a safe distance from the drill bit.
♦To start the drilling it is advisable to either turn
the core drill to one side in order to obtain an
initial groove and then slowly return to horizontal
or vertical position as soon as the drill bit has
engaged in the material to be drilled, or provide
a guide to stop the drill bit skidding across the
surface of the material to be drilled.
When taking a break
♦During all breaks you must place the machine in
such a way that there is no risk for it to be
unintentionally started. Make sure to place the
machine on the ground, so that it can not fall.
♦In the event of a longer break or when leaving the
workplace: Switch off the power supply and then
bleed the machine by activating the start and stop
device.
Maintenance
Regular maintenance is a basic requirement for the
continued safe and efficient use of the machine.
Follow the maintenance instructions carefully.
♦Before starting maintenance on the machine,
clean it in order to avoid exposure to hazardous
substances. See “Dust and fume hazards”
♦Use only authorised parts. Any damage or
malfunction caused by the use of unauthorised
parts is not covered by warranty or product
liability.
♦When cleaning mechanical parts with solvent,
comply with appropriate health and safety
regulations and ensure there is satisfactory
ventilation.
♦For major service of the machine, contact your
nearest authorised workshop.
♦After each service, check that the machine's
vibration level is normal. If not, contact your
nearest authorised workshop.
Every day
♦Clean and inspect the machine and its functions
each day before the work commences.
♦Conduct a general inspection for leaks and
damage.
♦Check the function of the trigger. Make sure that
it returns to its stop position when it is released.
Periodic maintenance
After each operating period of approximately 100
working hours or three times a year the machine
must be dismantled and all parts be cleaned and
checked. This work must be performed by authorized
staff, trained for this task.
Storage
♦Check that the machine is properly cleaned before
storage.
♦Store the machine in a dry place.
♦Keep the machine and tools in a safe place, out
of the reach of children and locked up.
Disposal
A used machine must be treated and disposed of in
such a way that the greatest possible portion of the
material can be recycled and any negative influence
on the environment is kept as low as possible, and
in respect to local restrictions.
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MHC 5
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SAFETY & OPERATING INSTRUCTIONS
Technical data
Troubleshooting
SolutionCauseProblem
Check the performance and connection of
the power source. Make sure that the return
line coupling is completely fitted with no
clearance
Core drill not connected properlyCore drill will not operate
Check the power source and ensure that the
flow and pressure are according to the
technical specifications
Oil flow and/or pressure too low
Check the power source and ensure that the
flow and pressure are according to the
technical specifications
Oil flow and/or pressure too lowCore drill runs at low speed
Clean systemContaminated hydraulic system
Carefully check the O-ring seals in the trigger
valve bushing and replace damaged ones
Internal leakage
Tighten trigger valve bushing properlyUntightened trigger valve bushingCore drill runs without pushing the trigger
Replace the O-ring at the bottom of the
trigger valve bushing hole
O-ring failure
Replace springCheck valve spring broken
Check the power source and ensure that the
flow and pressure are according to the
technical specifications - and that the
connections are correct
Flow too highTrigger lever stuck
Improper pressure/return line connection
Back pressure too high
Check trigger valve/reversing valve for
seizing
Impurities
Readjust the flat spring through the two
screws on the motor housing
Trigger lever blocked in locked positionTrigger lever cannot be released
Reduce the flow from the power source. If
necessary, use a flow divider to control the
flow
Flow too highSystem overheats
Use a power source with higher cooling
capacity or add an additional oil cooler in the
return line
Insufficient cooling
Machine data
COR 5, COR 15
7 (15.4)Weight without hoses and drill bit, kg (lb)
20-30 (5-8)Oil flow range, l.p.m. (US gal/min)
160 (2300)Maximum pressure relief valve setting, bar (psi)
C and DEHTMA category
14 (200)Maximum back pressure in return line, bar (psi)
30-70 (86-158)Oil working temperature, °C (°F)
Approx. 2Required cooling capacity, kW
30 l.p.m. (8 US gal/min)20 l.p.m. (5 US gal/min)
Drill bit diameter mm (in.)rpmDrill bit diameter mm (in.)rpmType
50-100 (2-4)90075-202 (3-8)600COR 5
12-30 (0.5-1.2)225025-75 (1-3)1500COR 15
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MHC 5
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SAFETY & OPERATING INSTRUCTIONS
Noise and vibration data
VibrationNoise
Three axes valuesSound powerSound pressure
Declared valuesDeclared values
ISO 206432000/14/ECISO 11203
B
m/s 2spreads
A
m/s 2value
Lw
guaranteed dB(A)
rel 1pW
Lp
r=1m dB(A) rel
20µPaType
0.813.10-<70COR 5 (Ø 102 mm, 20 lpm)
0.823.00-<70COR 5 (Ø 102 mm, 30 lpm)
0.762.70-<70COR 15 (Ø 62 mm, 20 lpm)
0.833.40-<70COR 15 (Ø 62 mm, 30 lpm)
Noise and vibration declaration statement
Guaranteed sound power level Lw according to ISO 3744 in accordance with directive 2000/14/EC.
Sound pressure level Lp according to ISO 11203.
Vibration value Aand uncertainty Bdetermined according to ISO 20643. See table ”Noise and vibration data”
for the values of A, B, etc.
These declared values were obtained by laboratory type testing in accordance with the stated directive or
standards and are suitable for comparison with the declared values of other tools tested in accordance with
the same directive or standards. These declared values are not suitable for use in risk assessments and values
measured in individual work places may be higher. The actual exposure values and risk of harm experienced
by an individual user are unique and depend upon the way the user works, in what material the machine is
used, as well as upon the exposure time and the physical condition of the user, and the condition of the
machine.
We, Atlas Copco Construction Tools AB, cannot be held liable for the consequences of using the declared
values, instead of values reflecting the actual exposure, in an individual risk assessment in a work place situation
over which we have no control.
This tool may cause hand-arm vibration syndrome if its use is not adequately managed. An EU guide to
managing hand-arm vibration can be found at
http://www.humanvibration.com/humanvibration/EU/VIBGUIDE.html
We recommend a programme of health surveillance to detect early symptoms which may relate to vibration
exposure, so that management procedures can be modified to help prevent future impairment.
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COR 5, 15Safety and operating instructions

MHC 5
19(doc no.)
SAFETY & OPERATING INSTRUCTIONS
EC Declaration of Conformity
EC Declaration of Conformity (EC Directive 2006/42/EC)
We, Atlas Copco Construction Tools AB, hereby declare that the machines listed below conform to the provisions
of EC Directive 2006/42/EC (Machinery Directive), and the harmonised standards mentioned below.
Pmax (bar)Hydraulic core drill
160COR 5
160COR 15
Following harmonised standards were applied:
♦ISO/FDIS 11148-3:2009
Technical Documentation authorised representative:
Emil Alexandrov
Atlas Copco Lifton EOOD
7000 Rousse
Bulgaria
General Manager:
Nick Evans
Manufacturer:
Atlas Copco Construction Tools AB
105 23 Stockholm
Sweden
Place and date:
Rousse, 2010-01-01
193392 5192 90a | Original instructions
Safety and operating instructionsCOR 5, 15

AMERICAN PNEUMATIC TOOLS 800.532.7402 • fax [phone]
1000 S. Grand Ave. • Santa Ana, CA 92705