MBX15
HydRAULic MoUNtEd BREAkER
MBX15
USER MANUAL
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TABLE OF CONTENTS
SAFETY PRECAUTIONS..........................................................................................................................................4
SAFETY SYMBOLS ..................................................................................................................................................6
TOOL STICKERS & TAGS........................................................................................................................................7
PRE-OPERATION.....................................................................................................................................................8
OPERATION............................................................................................................................................................10
UNDERWATER APPLICATIONS ..................................................................................................................13
PERIODIC MAINTENANCE CHECKS..........................................................................................................14
PROPER USE & CARE OF TOOL BITS.................................................................................................................15
TROUBLESHOOTING ............................................................................................................................................19
CHARGING THE MAIN ACCUMULATOR...............................................................................................................20
RECOMMENDED TORQUE VALUES ....................................................................................................................21
FLOW TEST PROCEDURES..................................................................................................................................22
SPECIFICATIONS...................................................................................................................................................23
MBX15 POWER CELL ILLUSTRATION..................................................................................................................24
MBX15 POWER CELL PARTS................................................................................................................................25
MBX15 HOUSING PARTS LIST..............................................................................................................................26
DECLARATION OF CONFORMITY........................................................................................................................27
IMPORTANT
To fill out a Product Warranty Recording form, and for information on your warranty,
visit Stanleyhydraulics.com and select the Company tab, Warranty.
(NOTE: The warranty recording form must be submitted to validate the warranty).
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SAFETY PRECAUTIONS
Tool operators and maintenance personnel must always
•
Ensure that all maintenance procedures recom-
comply with the safety precautions given in this manu-
al and on the decals and tags attached to the tool and
hose.
mended in this manual are completed before using
the equipment.
•
The operator must not operate the breaker or carrier
if any people are within the area where they may be
injured by flying debris or movement of the equip-
ment.
These safety precautions are given for your safety. Re-
view them carefully before operating the tool and before
performing general maintenance or repairs.
Supervising personnel or the owner operator should de-
velop additional precautions relating to the specific work
area and local safety regulations. Place the added pre-
cautions in the space provided in this manual.
•
•
Know the limits of your equipment.
Establish a training program for all operators to en-
sure safe operation.
•
•
•
•
Do not operate the tool unless thoroughly trained or
under the supervision of an instructor.
Become familiar with the carrier controls before op-
erating the carrier and the breaker.
When operating the breaker you must use ear pro-
tection, eye protection, and breathing protection.
While learning to operate the breaker and carrier, do
so at a slow pace. If necessary, set the carrier mode
selector to the slow position.
GENERAL SAFETY PRECAUTIONS
The Hydraulic Breaker will provide safe and dependable
service if operated in accordance with the instructions
given in this manual. Read and understand this manual
and any decals and tags attached to the breaker before
operation. Failure to do so could result in personal injury
or equipment damage.
•
Warning: Use of this tool on certain materials during
demolition could generate dust potentially contain-
ing a variety of hazardous substances such as as-
bestos, silica or lead. Inhalation of dust containing
these or other hazardous substances could result
in serious injury, cancer or death. Protect yourself
and those around you. Research and understand
the materials you are cutting. Follow correct safety
procedures and comply with all applicable national,
state or provisional health and safety regulations
relating to them, including, if appropriate arranging
for the safe disposal of the materials by a qualified
person.
•
•
•
•
Operate the breaker in accordance with all laws and
regulations which affect you, your equipment, and
the work site.
Do not operate the breaker until you have read this
manual and thoroughly understand all safety, opera-
tion and maintenance instructions.
The operator must be familiar with all prohibited
work areas such as excessive slopes and danger-
ous terrain conditions.
Do not operate the breaker until you have read the
carrier equipment manual and thoroughly under-
stand all safety, operation and maintenance instruc-
tions. The word “carrier”, as used in this manual,
means a backhoe or excavator or similar equipment
used to operate the breaker.
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SAFETY PRECAUTIONS
•
•
•
Make sure all controls (levers and pedals) are in the
NEUTRAL position before starting the carrier.
•
If you do not understand how to safely operate your
breaker, contact an authorized Stanley Dealer for
assistance.
While operating the breaker and carrier, keep hands
and feet on the controls at all times.
•
•
Keep this manual with the breaker.
Before leaving the carrier, always lower the boom
and insure the carrier is stable. Never leave the ma-
chine with the engine running. ALWAYS ENGAGE
THE PARKING BRAKE.
Do not operate this equipment if you are taking med-
ication which may affect your mental judgement or
physical performance.
•
•
Do not operate this equipment if you are under the
influence of drugs or alcohol.
•
•
Stop the engine before attempting to make any re-
pairs, adjustments or servicing to either the carrier
or the breaker.
Exposure to crystalline Silica (sometimes called
“silica dust”) as a result of breaking, drilling, or ham-
mering of rock, concrete, asphalt or other materials
may cause Silicosis (a serious lung disease), silico-
sis-related illnesses, cancer, or death. Respiratory
protection is highly recommended when working
with materials containing Silica Dust. Always wear
a respirator approved for protection against crystal-
line silica.
Do not operate the tool at oil temperatures above
190°F/88°C. Operation at higher temperatures can
damage the internal components of the breaker
and carrier and will result in reduced breaker per-
formance.
•
Do not operate a damaged, leaking, improperly ad-
justed, or incompletely assembled breaker.
•
•
Do not modify the breaker in any manner.
Use only tool bits supplied by Stanley Hydraulic
Tools. Use of tool bits supplied by another manu-
facturer may damage the breaker and will void the
warranty.
•
To avoid personal injury or equipment damage, all
breaker repair, maintenance and service must only
be performed by authorized and properly trained
personnel.
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SAFETY SYMBOLS
Safety symbols and signal words, as shown below, are used to emphasize all operator, maintenance and repair ac-
tions which, if not strictly followed, could result in a life-threatening situation, bodily injury or damage to equipment.
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury or death.
This safety alert and signal word indicate an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
DANGER
WARNING
CAUTION
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This safety alert and signal word indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
This signal word indicates a potentially hazardous situation which, if not avoid-
ed, may result in property damage.
CAUTION
NOTICE
This signal word indicates a situation which, if not avoided, will result in damage
to the equipment.
This signal word indicates a situation which, if not avoided, may result in dam-
age to the equipment.
IMPORTANT
Always observe safety symbols. They are included for your safety and for the protection of the tool.
LOCAL SAFETY REGULATIONS
Enter any local safety regulations here. Keep these instructions in an area accessible to the operator and mainte-
nance personnel.
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TOOL DECALS
Shown below and on the next page are decals and stickers found on the equipment that provide important informa-
tion. Replace decals and stickers when they are no longer legible. Decals may not be of actual size.
Part Number 32243
Accumulator Spec Sticker MBX15
Part Number 72074
Grease Sticker MBX15
Part Number 47351
Warning: Read Manual, Use
Breathing, Hearing, Eye
Protection Sticker
MBX15
Model Number Sticker
P/N 73007 – MBX15
P/N 66764
Made in USA/Global
Sound Power Level Sticker
P/N 66218 – 126 dBA MBX15
Stanley Hydraulic Tools
Division of The Stanley Works
3810 SE Naef Road
Milwaukie, OR 97267 USA
MODEL NO:
SERIAL NO:
OPERATING WEIGHT:
INPUT FLOW:
CIRCUIT RELIEF PRESSURE:
Stanley Logo Sticker
P/N 70752 – MBX15
CE Specification Plate
P/N 71494 – MBX15
Note: Decals shown are not of actual size
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PRE-OPERATION
PRE-INSTALLATION INSTRUCTIONS PREPARATION FOR OPERATION
EXCAVATOR SIZE
NITROGEN CHARGE
Contact Stanley Hydraulic Tools to determine correct ex- The breaker has been properly charged with nitrogen at
cavator size. See the "SPECIFICATIONS" section of this the factory and is ready to use (see page 20) for charg-
manual for hydraulic flow and pressure requirements.
ing information.
TOOL BIT LUBRICATION
Grease the top 250 mm/10 inches of the breaker tool
bit before installing. During operation, the tool can be
greased through the grease fitting. Grease as required.
Make sure the tool bit is against the tool stop by
placing the tool bit against the ground and then put-
ting down pressure on the breaker. SEE THE ILLUS-
TRATION BELOW AND ON THE FOLLOWING PAGE.
NOTICE
If hydraulic pressure, hydraulic back-pressure,
hydraulic flow, or excavator weight class are
exceeded, the tool warranty is void.
EXISTING EQUIPMENT HYDRAULICS VS
APPLICATION ATTACHING KITS
Grease This
Area of Bit
Using existing equipment hydraulic auxiliary systems
for operating hydraulic tools could cause problems for
the hydraulic tool and the hydraulic system if not set up
properly. Simply plugging into the hydraulic system with-
out confirming pressure and flow to the hydraulic tool is
not a good practice. Spare spool valves, dipper circuits,
etc., are just a few examples of easily accessible hy-
draulic circuits which could prove to cause problems for
hydraulic tool usage.
250 mm/10 in.
Tool Bit
Figure 1. Greasing the Tool Bit Before Installation
ATTACHING KITS adapt to existing hydraulic systems
of many popular backhoes and excavators.
NOTICE
If your equipment does not contain an attaching kit, ask
your Stanley dealer for information, installation, and
pricing on a kit which matches your equipment needs.
Greasing the tool bit without down pressure on
the tool will result in grease filling the space
between the piston and the tool bit.
TEST THE HYDRAULIC SYSTEM
1. Have your Stanley dealer test the excavator hydrau-
lic system to make sure the system is operating at
the manufacturers specified capacity and pressure
ratings.
When the breaker is next activated, the piston
will strike the grease at a speed that will cause
the grease to apply great force against the seals
and grease zerk resulting in damage to these
components.
2. Be sure the fluid in the hydraulic system is clean.
3. Check the hydraulic filter. Replace the filter if dirty or
deteriorated.
4. Have your Stanley dealer test the circuit to which
the breaker will be connected to make sure that the
circuit is supplying the specified flow and pressure
rating for the breaker. See the SPECIFICATIONS
section of this manual.
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PRE-OPERATION
LOW-TEMPERATURE WARM-UP
PROCEDURE
Piston not against
tool bit leaving space
between the piston
and bit.
Grease Will
Fill This
Space
1. After starting the excavator, warm-up the hydraulic
system at engine idle until hydraulic lines are warm
to the touch.
Tool Stop
Lower Bushing
Tool Bit
2. With the excavator at idle and the breaker suspend-
ed in the air or with minimal down pressure, turn on
the breaker to gradually warm up its internal com-
ponents.
3. When the hydraulic system and breaker are warm,
proceed with operation. See the OPERATION sec-
tion of this manual.
Figure 2.
SECURING THE TOOL
LONG TERM STORAGE
1. Lay the breaker in a horizontal position to install the
tool bit. Remove the rubber plug (item 35) and the
retainer pin (item 28), see Figure 3 below.
Figure 3.
Use the following procedure if storage of the break-
er is expected to be more than 6 months.
IMPORTANT: The piston protrudes out the bottom of the
cylinder when not in use, although it is inside the lower
body it will still be exposed to the elements and will rust
damaging internal components when it is put back into
service.
When installing the tool
retainer pin (item 28)
make sure the rubber plug
(item 35) is fully seated.
The rubber plug MUST be
installed BELOW FLUSH
to properly secure the pin.
Remove the tool bit and discharge the nitrogen gas from
the upper accumulator. Use the tool bit to push the pis-
ton inside the cylinder where it will be protected from the
elements. Grease the lower end of the exposed piston
thoroughly. Also thoroughly coat the tool bit, tool stop,
retaining pins, and lower bushing with grease.
If hoses are attached to the breaker, install plugs on
the hose ends. If hoses are removed from the breaker,
install plugs on the hose ends and install plugs in the
breaker “IN” and “OUT” ports.
2. Using a punch and hammer, drive out the tool re-
tainer pins (item 29).
Store breaker in a dry area under cover if possible. It is
best to store the breaker in an area that has a consistent
temperature to help avoid water condensation causing
rust. Store the breaker in a vertical position. Do not store
the breaker horizontally for extended periods.
WARNING
If the breaker has been laid horizontally for more than 6
months, check and/or replace all seals. Check for corro-
sion of bolts before operation.
Flying debris may be caused by striking the rod pins
with a punch or hammer.
Wear eye protection when installing or removing the
rod pins.
Failure to wear eye protection may result in eye
injury.
3. Grease the top area of the tool bit as shown on the
previous page.
4. Install the tool bit making sure the notches are
aligned with the lower body tool retainer pin holes.
5. Install the tool retainer pins, retainer pin and rubber
plug. See “Important” Figure 3.
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OPERATION
the edge, the energy will be absorbed into the material
PREPARATION FOR USE
without cracking it. Do not run the breaker longer than
15-20 seconds. If breakout does not occur within this
time, move the breaker to another position.
Read the section in this manual titled PREPARATION
FOR USE before operating a breaker. Failure to follow
the preparation instructions can result in severe damage
to the breaker and excavator and void the warranties of
both.
On flat material such as concrete runways, starting to
break in the middle of the material may cause vibrations
to be transmitted throughout the breaker and excavator
because the material has no place to break to. Always
try to start at a point which will permit the material to
break out.
POSITIONING THE EXCAVATOR
MAINTAIN DOWN PRESSURE
Maintaining hard contact with the surface of the material
to be broken in addition to maintaining adequate "down
force" is very important. Always keep "down pressure"
or "down force" on the point of the breaker by lifting the
wheels, tracks, or stabilizers slightly above the ground.
This method takes the "slack" out of the bracket and
boom pivots, and reduces the impact on the pivots in
the boom.
Figure 4. Position the Excavator
With the breaker tool in place on the material to be
worked, position the excavator so the dipper is at ap-
proximately 45° and the breaker is almost vertical. The
tracks of the excavator should be in line with booms and
the breaker.
POSITIONING THE BREAKER TOOL ON
THE WORK MATERIAL
Position the tool bit near the edge of the work material,
not in the center or far from the edge. Position the tool
6-18 inches (depending on the material) from the edge.
Breaking off smaller pieces of rock or concrete usually
accomplishes more than trying to break larger pieces.
Apply down pressure
Figure 6. Maintain Down Pressure
The operator needs to be constantly aware of the amount
of down pressure being applied and be able to adjust it
if necessary. Not enough down pressure results in low
production and accelerates wear and tear on the equip-
ment. Too much down pressure may cause the breaker
housing to violently crash into the broken material when
"break-through" occurs.
Break near the edge
In any breaking job, the operator should make every ef-
fort to “follow” the breaker with “down-pressure” as the
machine breaks farther into the material. The breaker
should be stopped as soon as “break-thru” occurs or if it
is apparent that good solid blows are not occurring.
Figure 5. Position the Breaker
On flat material or rock, the breaker should be vertical
or “curled” back slightly to direct the impact force down-
ward and toward the backhoe. This directs the force
back toward the edge of the work material. If the tool
is positioned in the center of the work, or too far from
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OPERATION
BREAKING
The operator should note the sound of the blow when
the breaker is running. With experience, the operator will
be able to tell the difference between a good solid blow
and a hollow sounding blow. A hollow blow means that
solid blows are not occurring and the breaker should be
repositioned.
Continuous tool penetration usually does not do much
good. If the material does not break with 3 to 4 inches of
tool penetration, it usually won’t break with full penetra-
tion. The time used for additional penetration could be
better used to strike blows in another place.
Scoring with the
breaker
Figure 8. Scoring with Breaker
Use a “scoring” method of breaking when cracking the
material becomes difficult. This technique involves strik-
ing the rock or concrete at several places along a line
where you want the crack to occur. Most materials break
sooner when struck several places along a line than
when struck repeatedly in one location. On each line, the
breaker tool should be continually repositioned. Practice
determines the best length of time to stay in one spot
(15-20 seconds) and how far to move the breaker tool.
Do not break continuously
in one place
Breaker tool binding can cause erratic breaker opera-
tion and premature wear on the tool shank. Breaker tool
binding is caused by failure to direct the down force in
the direction of the tool bit.
Figure 7. Breaking
NOTICE
Continuous breaking in the same area for lengthy
periods will create excessive temperatures at
the tip of the tool bit resulting in loss of temper
(hardness) of the bit and causing mushrooming of
the tip of the bit, and may lead to failure of the bit.
Do not pry with or
bind the tool bit
Many materials do not respond well to continued ham-
mering in one place. The breaker tool should be reposi-
tioned on the work each time the tool penetrates but
does not crack the material.
Figure 9. Breaker Binding
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OPERATION
type can be experienced in trench work where obtain-
Excessive side force cocks the tool in its bore, pre-vents
proper movement and causes premature tool shank
and bushing wear. Since the breaker tool bit must be
pushed up into the breaker to operate, a binding tool
prevents the breaker from operating correctly. Binding
also causes the tool bit and tool bushings to seize and
often results in breakage of one or more breaker com-
ponents. Always direct the down pressure force in a line
toward the point of tool contact with the work.
ing striking contact with the work surface is difficult or
the wrong tool bit is used, or in flat rock work where the
operator fails to stop operation of the breaker when slip-
page, fracturing or material break-through occurs.
Blank firing as a result of operator error occurs when the
tool bit is not in contact with the work surface to be bro-
ken and is allowed to drop down in the lower body cav-
ity so that the piston is not able to strike it. Instead, the
downward movement of the piston will be stopped by an
internal oil cushion located at the bottom of the piston’s
stroke and the energy of the piston will be absorbed by
breaker components and excavator boom components.
Blank firing of this type can be experienced when the
operator fails to stop operation of the breaker when the
material fractures or material break-through occurs, or
during re-positioning of the breaker.
NOTICE
DO NOT pry with the tool bit and breaker.
Prying will damage the tool bit and associated
breaker components.
While blank firing cannot always be avoided, it can be
kept to a minimum by avoiding the above conditions as
much as possible.
Moving rocks with the tool bit is another method of bind-
ing the tool bit. This practice should be avoided as it may
cause tool bit failure.
Rebar reinforced concrete introduces the problem of
concrete chunks being held together by the rebar after
the concrete has been broken. The best approach to this
problem is to use a chisel point tool which permits cut-
ting the rebar with the breaker. Another method is to pe-
riodically cut the rebar with an oxyacetylene torch.
BLANK FIRING
To understand “Blank Firing”, the operator needs to
be aware that if the tool bit is not pressed against the
work surface the tool bit will drop down in the lower body
cavity far enough so that the piston cannot strike it. Blank
firing occurs whenever the breaker is operating and the
piston is not able to strike the tool bit solidly or not strike
the tool bit at all. Blank Firing accelerates wear and tear
on breaker and excavator components and may result in
failure of one or more components. Excessive blank fir-
ing may be considered equipment abuse and may result
in voiding warranties.
Break-through or difficult surface contact results in blank
firing when the material being broken fractures and the
tool bit is no longer in “hard contact” with the material
but is still pushed high enough in the lower body cavity
so that the piston can strike it. In this condition, the pis-
ton strikes the tool bit and the tool bit, in turn, is driven
against the retaining pins because it is not in sufficient
contact with the material to be broken. The energy is ab-
sorbed by the retaining pins, other breaker components,
and the excavator boom components. Blank firing of this
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OPERATION
UNDERWATER USE
CAUTION
Do not use underwater
without air application kit
UNDERWATER USE
No part of the breaker may be submerged in water
unless an air application kit is used. Underwater
usage of the breaker without air application will
cause internal damage to the breaker. Consult
Stanley for modifications and specific warranty
coverage if you have an underwater requirement.
Figure 11. Underwater Use
The breaker is equipped with an underwater port on the
side of the breaker. Connect an air line to this port and
supply the required air pressure and flow to the breaker
when using underwater. The following table shows the
air pressure required.
Model
Required Air
Amount
Required Air
Pressure
Compressor
Horsepower-Min on Exploded View
3.7 Kw Item # 9A
Fitting Location
MBX15
0.5m³ / min
75-100 psi /5-7 bar
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OPERATION
EACH DAY
PERIODIC MAINTENANCE CHECKS
•
Check for loose or missing fasteners. Tighten or re-
place as needed.
•
Periodically check wear pad clearance by moving
the power cell back and forth. Set the breaker on the
bit and then use the excavator to move it from side
to side as shown in the illustration. If the deflection
exceeds 1.5 inches, replace the wear pads.
•
•
Inspect tool retaining pins and pockets for wear.
Check for hydraulic leaks at all fittings and hoses.
Replace any defective hoses.
•
•
Apply grease to the grease fitting in the lower body
each morning. Grease as needed throughout the
work day.
MEASURE THROUGH HOLE CENTER AND IF
DIFFERANCE BETWEEN A & B IS GREATER
THAN 1.500, REPLACE WEAR PLATES.
Inspect the lower bushing, tool retainer, tool retainer
pins. Reseat or replace if necessary.
TOOL STOP & LOWER BUSHING
Inspect the tool stop, and lower bushing for excessive
galling and metal pickup on the tool bit. Also check for
cracks. If cracks are present, the parts must be replaced.
The extent of wear of the tool stop and lower bushing
and the tool bit can be checked by moving the tool bit
back and forth and measuring the gap between the tool
bit and the lower bushing. If the gap is more than 0.354
in./9 mm the tool stop, lower bushing, and the tool bit
should be replaced. A gap in excess of 0.354 in./9 mm
will cause damage to the piston. Do not just replace the
tool bit or the lower bushing individually as this will result
in premature wear of the replaced component. It is rec-
ommended to replace all worn components.
MOVE THE TOOL BIT
BACK & FORTH &
MEASURE THE GAP
BETWEEN TOOL BIT &
LOWER BUSHING
PUSH TOOL EACH WAY FOR MEASUREMENT.
Figure 12. Checking for Wear
CHECKING WEAR PLATE WEAR
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PROPER USE & CARE OF TOOL BITS
Tool bits are made and heat treated to specification.
Worn-out retainer pin(s) will cause uneven loading on
the pin(s) themselves, causing failure of the tool or re-
tainer pin(s). This will also cause excessive wear to the
front bushing(s).
Tool bits, however well made, are wear parts, and are
used in the most destructive applications. Even when
the hydraulic breaker is used properly, and the operator
is an experienced one, a tool bit may become damaged.
When a tool bit has been damaged, it is useful to de-
termine the cause immediately in order to prevent the
damage from occurring again.
METAL-TO-METAL CONTACT
Extreme caution should be used to avoid scratches or
gouges on the surface of the tool. These areas create a
stress concentration Metal-to-Metal Contact point, thus
weakening the tool.
All Stanley tool bits are machined and hardened for
maximum performance. Care must be taken to maintain
the tools original condition for optimum productivity and
life expectancy. It is not uncommon for an operator who
is unfamiliar with using a hammer to break a point. This
is part of the learning experience.
Another form of metal-to-metal contact is galling, which
usually occurs from the lack of lubrication. Special care
should be taken to keep the tool shank lubricated every
two (2) to three (3) hours.
Steel failures that were caused by surface damage take
two main forms. The simplest form is caused by deep
scratches on working steel surface. The broken surface
has a shell pattern around the starting point of failure,
similar to the one in the fatigue failure. The other parts of
the broken surface are brittle. These failures work slowly
through the steel until it suddenly parts completely.
Listed below are several methods to determine tool fail-
ure and will quickly aid in warranty determination.
TOOL FAILURE NOT COVERED
UNDER WARRANTY
BLANK FIRING OR FREE RUNNING
The second form of failure caused by surface damage
occurs when there are deep scratches on working steel
surface and there was also excessive bending stress.
The broken surface also shows the shell pattern, but the
other parts of the broken surface are brittle and usually
have a “lip” like that in a stress failure.
This occurs when the tool is not in proper contact with
the work, thus causing the energy produced by the ham-
mer to be concentrated on the tool retainer(s) and the
retainer slot(s) on the tool itself. Caution should be used
to prevent the hammer from sliding off slanted surfaces
or when breaking through thin material.
The illustration below is typical of the kind of breakage
that occurs from excessive blank firing.
Figure 13. Excessive Blank Firing Breakage
WORN-OUT FRONT BUSHING(S) OR
RETAINER PIN(S)
Worn-out front bushing(s) will cause the tool to become
misaligned inside the hammer. This misalignment will
cause uneven contact between the piston and tool, thus
causing stress to concentrate on one particular area of
the tool. This can also cause the tool to bind inside the
hammer. Call your dealer for acceptable wear allow-
ances.
Figure 14. Metal-to-Metal Contact Examples
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PROPER USE & CARE OF TOOL BITS
In its most extreme forms, the combination of surface As the next illustration shows, fatigue failures take many
damage and severe bending can quickly break even the forms, but they all exhibit similar features. Generally, the
best working steels.
broken surface is brittle and has a “lip” like that in the
bending failure, even though, in some cases, the lip has
been broken.
The illustrations below show examples of severe stress
breaks.
Figure 18. Fatigue Failures
Figure 15. Severe Stress Breaks
CORROSION
PRYING
Tools should be greased and stored out of the weather.
Corrosion tends to accelerate the fatigue fractures of the
tool.
This is the most common cause of tool failure. Even
when there is no surface damage, the stress from pry-
ing can easily break a working steel. This kind of failure
generally results from any type of side pressure such as
an incorrect breaking angle or from using the tool to re-
position material. The tool should not be used as a pivot
point when repositioning the carrier. The power gener-
ated by the carrier will far exceed the strength of the tool.
MUSHROOMING
Driving the tool into a hard material for a long period of
time generates an intense heat, indicated by a blue tone
just above the point. This will soften the steel and cause
the point to fold over or mushroom the end of the tool.
Avoid hammering in one location for too long. If material
does not break after a short period (approximately 15 to
20 seconds), reposition the tool.
Figure 16. Prying Damage Example
Similar failures can also occur when the steel is used
with extreme down pressure, and the steel repeated-
ly slips off the work at an angle, or the material, itself
moves from under the working steel.
Figure 19. Mushrooming
If the overheated steel is suddenly cooled by being
dipped in standing water, for example, the metal will
harden and become brittle. These are some examples
of failure caused by temper changes occurring on the
job.
Figure 17. Extreme Down Pressure Breakage
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PROPER USE & CARE OF TOOL BITS
Look for surface cracks, galling, or gouge marks. Breaks
TOOL FAILURE COVERED UNDER
WARRANTY
INTERNAL MATERIAL FLAW
that start as surface damage have a “sea shell” pattern,
with the damaged spot at the center. A large “sea shell”
indicates a slow growing break; a small one indicates
one compounded by side stress.
This failure occurs when a foreign material is rolled into
the steel during the manufacturing process, causing an
imperfection in the internal material flaw grain. The re-
sult is an inherent weakness in the tool shank and even-
tual breakage.
Stress failures start small, and spread into the center
of the steel. In a stress failure, the coarser the grain,
the greater the stress was, and the more rapid was the
failure.
The fatigue failure is started by the defects within the tool
bit. The broken surface exhibits a shell pattern around
the starting point of failure, like that in the fatigue failure.
The other parts of the broken surface are brittle.
•
•
Failures in this area are usually the result
of blank firing, worn bushing(s), worn re-
tainer pin(s) or the lack of lubrication.
This is the only kind of tool bit failure that is always
covered under warranty.
Failures in this area are usually the result
of worn retainer pin(s) or blank firing.
•
Failures in this area are usually the result
of prying, metal-to-metal contact or corro-
sion. Prying failures often exhibit a shell-
like formation near the edge of the steel
diameter where the break began, and a
“tail” opposite that where the remaining
steel bent and tore.
Figure 20. Internal Material Flaw
•
Failures in this area are usually the result
of heat build-up, mushrooming, or improp-
er contact with the work.
As a rule, working steel failures can be diagnosed by
looking at the break itself, and at the place on the steel
where the break occurred. Discoloration, like “rainbow”
effects or blue bands, is the result of extreme heat.
Figure 21. Diagram of Tool Bit Failures
MBX15 User Manual ◄ 17
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PROPER USE & CARE OF TOOL BITS
Stanley Breakers are available with several different types of tool bits. The most common are the moil, chisel and
the blunt. Each of these working steels has its own purpose as described below:
To obtain the maximum production from the breaker, it is important to select the proper working steel. Consult your
Stanley representative for assistance in selecting the proper working steel for your application.
MOIL
This is by far the most popular
working steel. It is a general
purpose point used to break
anything from concrete to hard
rock. Its pencil-type point is
used to fracture the material.
The tool is best where penetra-
tion speed is important.
CHISEL
This style of point is used gen-
erally used for trench work,
where a controlled break is re-
quired, and for rock breaking
on materials with a definite line
of cleavage. A chisel bit also
works well in softer concretes
where a moil might penetrate
quickly, but not cause a frac-
ture line.
BLUNT
This flat type of point is used to
break softer material such as
coal or shale. A moil or chisel
will tend to punch holes in this
type of material, where a flat
blunt will shatter the material.
It is also useful when break-
ing irregularly shaped material
where its broad tip makes it
easier to position.
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TROUBLESHOOTING
If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the breaker, always check that the hydraulic power source is supplying the
correct hydraulic flow and pressure to the breaker as listed in the table. Use a flowmeter known to be accurate.
Check the flow with the hydraulic oil temperature at least 180 °F/82 °C. An approved test procedure is available in
the complete service manual, P/N 41893.
PROBLEM
Breaker will not fire.
CAUSE
Low hydraulic oil level.
No flow to breaker.
SOLUTION
Fill reservoir.
Have hydraulic circuit tested by
authorized dealer/distributor per
approved procedure.
Main relief set too low.
Internal damage.
Have unit serviced by authorized
dealer/distributor.
Breaker runs slowly.
Low hydraulic flow.
Have hydraulic circuit tested by
authorized dealer/distributor per
approved procedure.
Excessive heat build up.
Excessive nitrogen pressure.
Internal leakage.
Have unit serviced by authorized
dealer/distributor.
Breaker runs erratically.
Low or excessive back pressure.
Damaged switch or connection.
Main relief set too low.
Internal damage.
Have carrier serviced by authorized
dealer/distributor.
Have unit serviced by authorized
dealer/distributor.
Tool binding.
Low hydraulic oil level.
Fill reservoir.
Breaker runs but at reduced power. Low accumulator charge.
Excessive back pressure.
Have unit serviced by authorized
dealer/distributor.
Main relief set too low.
Breaker leaks oil around tool bit and Lower seals failed.
tool bushing.
Have unit serviced by authorized
dealer/distributor.
Hydraulic system overheats.
Main relief set too low.
Have carrier serviced by authorized
dealer/distributor.
Insufficient cooling capability in
hydraulic circuit.
Line/hose size too small.
Excessive back pressure.
MBX15 User Manual ◄ 19
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CHARGING THE MAIN ACCUMULATOR
The tools required to charge the breaker are shown be- 6. If the pressure is correct, unscrew the gauge to re-
low. The 33464 adapter and 33300 adapter assembly
can be obtained individually or in a kit (P/N 33465). Note
that the adapter and adapter assembly are designed to
be used with the 505232 charge hose assembly and
the 28257 accumulator tester which are used with other
Stanley model breakers. When charging the breaker,
make sure the tools and charge valve are clean. Dirt can
contaminate the charge valve and cause leakage.
tract the plunger. Then, loosen and remove the tes-
ter from the charge valve. If the pressure is not cor-
rect, proceed to Step 7.
NOTE:
When disengaging the tester a "POP" of nitrogen is
normal.
7. Connect the charge hose assembly to the charg-
ing valve on the tester. Make sure the valve on the
charge hose assembly is closed. Open the valve on
the nitrogen bottle.
1. Remove the protective plug from the accumulator
charge valve.
2. Screw the adapter assembly (P/N 33300) onto the
8. Very slowly open the valve on the charge hose as-
sembly and slowly meter the nitrogen into the break-
er charge valve until the tester reads the correct
charge pressure.
tester (P/N 28257) and tighten it.
3. Hold the chuck end of the tester and turn the gauge
fully counter clockwise to ensure the plunger inside
the chuck is completely retracted.
9. When the correct pressure is obtained, close the
valve on the charge hose assembly and on the nitro-
gen bottle. Unscrew the gauge to retract the plung-
er. Loosen and remove the tester from the charge
valve. Before replacing the protective plug, inspect
the plug o-ring. If damaged or deformed, replace the
plug. Apply Loctite™ 242 to plug and cap.
4. Screw the tester into the breaker charge valve by
turning the chuck. Do not use the gauge for turn-
ing as this will advance the plunger in the chuck.
Tighten the chuck lightly against the breaker charge
valve.
5. Turn the gauge clockwise to advance the plunger
until a pressure is indicated on the gauge. Do not
overtighten.
Nitrogen Bottle
(locally obtained)
IMPORTANT
Charge Valve Plug
See Specifications page for correct
charge pressure
505232 Charge Hose Assy
(Includes gauge, valve, hose
and charge valve adapter)
Figure 22. Charging the Main Accumulator
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RECOMMENDED TORQUE VALUES
MBX15 TORQUE TABLE
ITEM
NO.
FT/
LB
ILLUSTRATION DESCRIPTION APPLY
NM
3
POWER CELL
CHARGE
VALVE
LOCTITE™ 75
242
101
8
POWER CELL
O-RING PLUG LOCTITE™ 130 176
242
2
5
HOUSING
HOUSING
CAPSCREW
—
—
455 617
455 617
MTG
BRKTNUT
41
9
POWER CELL
POWER CELL
POWER CELL
TIE RODNUT1
PLUG4
KOPR
KOTE™
720 976
LOCTITE™ 30
680
41
27
4
PLUG
—
20
The torque values for TIE RODS NUTS in the above chart are
intended to be used with a torque multiplier.
The following procedure is the recommended procedure for tie
rod torque and may be tightened to the specified torque using the
following procedure (see figure A & B ).
Pre Torque Setting
Figure B
1. Thread tie rod into lower nut by hand until it bottoms out. Then install
the upper tie rod nut and install all the way down until contacts the top
of the main accumulator, then hold the upper nut from turning and with
a wrench turn just the tie rod until it has a gap as shown in figure B
above (0 - 1.5mm / 0 - 0.059 in., top of tie rod flush or just below top
of upper tie rod nut).
Recommended Tie Rod Torque Procedure
Figure A
2. Pre-torque the upper tie rod nuts to 360 ft. lb. / 488 Nm using a cross
pattern as shown in the illustration at the left.
3. Using the illustration as a guide, mark a line on each nut and designate
it as (A).
120°
4. Using the illustration as a guide, measure the degrees indicated in
the chart, from point (A) to point (B) and make a mark near the nut.
The degrees listed in (figure A) for turning the nut to achieve the final
torque is listed as 120°-130°. Make a mark on one point of the nut
and designate that point as (A). Measure 120°-130° degrees clock-
wise from point (A) and make a mark next to the nut. Designate that
point as (B). Turn the nut clockwise until point (A) and point (B) line up.
150°
MBX15
120°-130°
Tighten in a cross pattern
5. Continue this procedure in a cross pattern on all 4 nuts.
Pre-torque to 360 ft. lb./488 Nm
MBX15 User Manual ◄ 21
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FLOW TEST PROCEDURES
The correct performance of this procedure will verify if NOTE:
the auxiliary circuit of the carrier is adequate to properly
operate a Stanley attachment.
The relief valve pressure must be greater than the
operating pressure of the attachment and three
This procedure is generic in form. It is the end users times the back-pressure. Never use the relief valve
responsibility to ensure that this procedure will work with to control the flow rate in the circuit. Cracking pres-
his specific type of equipment.
sure means the loss of 4 or more GPM.
If an adequate flow meter is not available contact your Record the relief cracking pressure
psi.
Stanley Hydraulic Distributor for assistance.
Example:
TEST PROCEDURE
1. With the auxiliary circuit (or kit) completely installed
connect the flow meter between the tool inlet and
outlet hoses.
Operation pressure of a breaker is 2700 psi. Back-pres-
sure is 150 psi. A good rule to follow when setting the
relief, multiply the back pressure by 3 then add this num-
ber to the operation pressure of the attachment.
Operating Pressure
Back-pressure
2700 psi
450 psi
NOTE:
Always use the hoses that are supplied for the at-
tachment and make sure the machine hydraulic
oil is between 90 to 120 °F. This will assure correct
readings and adjustments.
Operating pressure of the tool
3150 psi
The relief valve setting must be greater than the estimat-
ed operating pressure of the tool. If the setting is lower,
damage to the circuit may occur. Excess heat will be
generated in the circuit which will damage the attach-
ment and carrier.
2. With the machine setting at the mode that’s going to
be used to operate the attachment record the GPM
_____.
Locate the correct flow for the attachment in the
manual under the specification section. Adjust the
machine to the correct GPM.
HEAT LOAD TEST
With the installation kit properly installed and adjusted
per the above procedure, conduct the heat load test as
follows.
NOTE:
If possible, always set the machine to the highest
GPM output mode. This will prevent the operator
from over flowing the attachments.
1. Connect the flow meter between the tool inlet and
outlet hoses.
2. With the carrier set in the attachment mode, re-
strict the flow meter until a pressure of 1000 psi
is achieved. This pressure must be maintained
throughout the heat test.
3. Once the correct GPM flow is achieved fully open
the restrictor on the flow meter.
4. With the machine in the attachment mode set in
step 2 record the back-pressure. At this point the
pressure reading on the pressure gauge is the back-
pressure in the circuit. This pressure must not ex-
ceed 200 psi/13.5 bar.
NOTE:
Closing of the restrictor may be required as the tem-
perature increases.
Monitor the oil temperature from the flow meter until
no change is noted. Record the time required for oil to
stabilize. Record the surrounding temperature (ambi-
ent temperature). Record the time required to stabilize
minutes.
Excessive back-pressure will slow the attachments
operation and lead to premature seal failures and
over heating.
Record the back-pressure
psi.
5. Close the restrictor valve on the flow meter until the
attachment relief starts to crack or open. The relief
valve opens when the flow rate (GPM), indicated on
the flow meter begins to decline rapidly. Locate the
tools operating system relief pressure in the specifi-
cation section in the manual. Adjust attachment re-
lief to specification.
Record the stabilized oil temperature
Record the ambient temperature
°F.
°F.
The “heat rise” is calculated as the stabilized tempera-
ture minus the ambient temperature.
22 ► MBX15 User Manual
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SPECIFICATIONS
NOTE:
MBX15
Weights, dimensions and operating
specifications listed on this sheet
are subject to change without no-
tice. Where specifications are criti-
cal to your application, please con-
sult the factory.
Impact Energy Class
ft lb
1500
2030
J
Blows Per Minute
Flow Range
bpm
400-800
gpm
lpm
15-25
56-95
Hydraulic Operating Pres-
sure
psi
bar
1885-2200
130-152
System Relief Pressure
(minimum cracking)
psi
bar
3000
206
Oil Temperature (max)
Hose Diameter (min)
Adapter Fitting Size & Type
Weight (w/Tool Bit)
F
176 °F
80 °C
C
inch
mm
3/4
19
Male JIC 37° Flare
1-1/16 × 12 UNF
lb
kg
1168
531
Length
inch
mm
69
1760
(w/Tool Bit)
Tool Diameter
inch
mm
3.3
85
Tool Working Length
inch
mm
16.6
426
Main Accumulator Charge
Pressure
psi
bar
247 +/- 7
17 +/- 0.5
Sound Power Level (LW)
dBA
126
Carrier Size
lb
kg
14000-26000
6300-11800
ACCESSORIES
Attaching Kits.................................................................................................................................................................................... Consult Dealer
Charge Hose Assy (Valve, Hose, for nitrogen tank & charge valve connections) ........................................................................................ 505232
Adapter Assy (Required to charge main accumulator)................................................................................................................................... 33300
Adapter (Short) (Required to Charge Main Accumulator on MBX15)............................................................................................................. 33464
Charge Adapter Kit (Includes 33300 & 33464)............................................................................................................................................... 33465
Charge Kit Assembly (Includes 505232 hose, 28257 Tester, and 372047 Box)............................................................................................. 34892
Accumulator Tester......................................................................................................................................................................................... 28257
MBX15 User Manual ◄ 23
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MBX15 POWER CELL ILLUSTRATION
When installing the tool
retainer pin (item 28)
make sure the rubber plug
(item 35) is fully seated.
The rubber plug MUST be
installed BELOW FLUSH
to properly secure the pin.
72330 Tie
Rod Kit
24 ► MBX15 User Manual
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MBX15 POWER CELL PARTS LIST
ITEM P/N
QTY DESCRIPTION
MAIN ACCUMULATOR
ITEM P/N
71624
QTY DESCRIPTION
1
71592
1
3
2
2
2
1
1
3
1
3
2
2
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
2
2
3
1
2
2
2
4
1
4
4
4
4
1
1
1
1
1
TOOL BIT MBX15 CROSS CUT CHISEL
2
71593
68679
68680
68681
71594
71595
71596
71597
71598
68688
68689
68690
71599
71600
71601
71602
71603
71604
71605
71606
71607
71608
71609
71610
71611
71612
71613
71614
71615
68711
71616
71617
71618
68687
69102
72330
71619
71620
71621
71622
71623
O-RING
71625
71626
71627
TOOL BIT MBX15 LINE CUT CHISEL
TOOL BIT MBX15 BLUNT
3
CHARGE VALVE
PLUG
4
TOOL BIT MBX15 MOIL
5
O-RING
6
CYLINDER
71628
1
SEAL KIT
7
PISTON
8
PLUG
9A
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27A
28
29
30
32
33
34
35
36
37A
PLUG
O-RING
ADAPTER
O-RING
ADAPTER CAP
BUFFER SEAL
SEAL, U-CUP
SEAL DUST
SEAL CARRIER
SEAL, STEP
SEAL, GAS
VALVE SLEEVE
VALVE
VALVE PLUG
O-RING
O-RING
LOWER BODY MBX15
TOOL STOP
LOWER BUSHING
RETAINER PIN
TOOL RETAINER PIN
RETAINER PIN
GREASE NIPPLE
SNAP RING
RUBBER PLUG
RUBBER PLUG
DOWEL PIN
PLUG
TIE ROD KIT (INCL ITEMS 38 THRU 41)
TIE ROD MBX15
LOWER TIE ROD NUT
TIE ROD WASHER
UPPER TIE ROD NUT
TOOL BIT MBX15 CONICAL
38
39
40
41
42
MBX15 User Manual ◄ 25
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MBX15 HOUSING PARTS
1A
72331 Tie
Rod Kit
ITEM P/N
QTY DESCRIPTION
1A
71160
1
MBX15 POWER CELL W/CROSS CUT
TOOL BIT
1
66680
1
1
UPPER BUMPER
72331
30949
HOUSING FLANGE BOLT KIT (INCL ONE
ITEM 2, TWO ITEM 3 & ONE ITEM 5)
2
8
CAPSCREW
3
17559 16
WASHER
4
32243
22181
70752
66660
73007
66723
66681
72074
47351
71494
66764
1
8
2
1
2
8
1
1
1
1
1
PRESSURE SPEC STICKER
NYLOCK NUT
5
6
STANLEY STICKER
HOUSING WELDMENT
MBX15 MODEL STICKER
SIDE BUMPER
7
8
10
11
12
14
15
16
LOWER BUMPER
GREASE STICKER
COMPOSITE WARNING STICKER
CE SPEC PLATE
MADE IN USA WITH GLOBAL
MATERIALS
17
66218
1
SOUND POWER STICKER 126 DBA
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DECLARATION OF CONFORMITY
Hydraulic Tools
DECLARATION OF CONFORMITY
ÜBEREINSTIMMUNGS-ERKLARUNG
DECLARATION DE CONFORMITE CEE
DECLARACION DE CONFORMIDAD
DICHIARAZIONE DI CONFORMITA
______________________________________________________________________
I, the undersigned:
Weisbeck, Andy
Ich, der Unterzeichnende:
Je soussigné:
Surname and First names/Familiennname und Vornamen/Nom et prénom/Nombre y apellido/Cognome e nome
El abajo firmante:
lo sottoscritto:
hereby declare that the equipment specified hereunder:
bestätige hiermit, daß erklaren Produkt genannten Werk oder Gerät:
déclare que l’équipement visé ci-dessous:
Por la presente declaro que el equipo se especifica a continuación:
Dichiaro che le apparecchiature specificate di seguito:
1. Category:
Kategorie:
Catégorie:
Categoria:
Categoria:
Mounted Hydraulic Breaker
2. Make/Marke/Marque/Marca/Marca
Stanley
MBX15
3. Type/Typ/Type/Tipo/Tipo:
4. Serial number of equipment:
Seriennummer des Geräts:
Numéro de série de l’équipement:
Numero de serie del equipo:
Matricola dell´attrezzatura:
All
Has been manufactured in conformity with
Wurde hergestellt in Übereinstimmung mit
Est fabriqué conformément
Ha sido fabricado de acuerdo con
E’ stata costruita in conformitá con
Directive/Standards
Richtlinie/Standards
Directives/Normes
Directriz/Los Normas
Direttiva/Norme
No.
Nr
Numéro
No
Approved body
Prüfung durch
Organisme agréé
Aprobado
n.
Collaudato
EN
12100-2:2009
TÜV
Machinery Directive
2006/42/EC:2006
Registered No.
K1508/M06
Test Report – K2510/M06
5. Special Provisions:
Spezielle Bestimmungen:
Dispositions particulières:
Provisiones especiales:
Disposizioni speciali:
None
6. Representative in the Union: Patrick Vervier, Stanley Dubuis 17-19, rue Jules Berthonneau-BP 3406 41034 Blois Cedex, France.
Vertreter in der Union/Représentant dans l’union/Representante en la Union/Rappresentante presso l’Unione
Done at/Ort/Fait à/Dado en/Fatto a Stanley Hydraulic Tools, Milwaukie, Oregon USA
Date/Datum/le/Fecha/Data
1-5-11
Signature/Unterschrift/Signature/Firma/Firma
Position/Position/Fonction/Cargo/Posizione
Engineering Manager
MBX15 User Manual ◄ 27
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Stanley Hydraulic Tools
3810 SE Naef Road
Milwaukie, Oregon 97267-5698 USA
(503) 659-5660
Fax (503) 652-1780
73048 7-2014 Ver. 3
Copyright© 2012 StanleyBlack&Decker
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