MB656
MOUNTED
HYDRAULIC
BREAKER
Safety, OperatiOn and Maintenance
USer ManUaL
© 2012 Stanley Black & Decker, Inc.
New Britain, CT 06053
U.S.A.
29169 1/2014 Ver. 7
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TABLE OF CONTENTS
DECLARATION OF CONFORMITY..........................................................................................................................2
SAFETY SYMBOLS ..................................................................................................................................................4
SAFETY PRECAUTIONS..........................................................................................................................................5
TOOL STICKERS & TAGS........................................................................................................................................8
OPERATION..............................................................................................................................................................9
TROUBLESHOOTING ............................................................................................................................................15
MAINTENANCE ......................................................................................................................................................16
CHARGING THE ACCUMULATOR.........................................................................................................................17
FLOW CONTROL KIT INSTRUCTIONS .................................................................................................................18
WEAR TOLERANCES ............................................................................................................................................19
PROPER USE & CARE OF TOOL BITS.................................................................................................................20
FLOW TEST PROCEDURES..................................................................................................................................24
DEFINITIONS..........................................................................................................................................................26
SPECIFICATIONS...................................................................................................................................................27
ACCESSORIES.......................................................................................................................................................28
MB656 POWER CELL ILLUSTRATION..................................................................................................................29
HOUSING PARTS ILLUSTRATION.........................................................................................................................30
MB656 PARTS LIST................................................................................................................................................31
MB656 MOUNTING BRACKETS ............................................................................................................................32
IMPORTANT
To fill out a Product Warranty Recording form, and for information on your warranty,
visit Stanleyhydraulic.com and select the Warranty tab.
(NOTE: The warranty recording form must be submitted to validate the warranty).
SERVICING THE STANLEY HYDRAULIC BREAKER. This manual contains safety, operation, and routine mainte-
nance instructions. Stanley Hydraulic Tools recommends that servicing of hydraulic tools, other than routine main-
tenance, must be performed by an authorized and certified dealer. Please read the following warning.
WARNING
SERIOUS INJURY OR DEATH COULD RESULT FROM THE IMPROPER REPAIR OR
SERVICE OF THIS TOOL.
REPAIRS AND / OR SERVICE TO THIS TOOL MUST ONLY BE DONE BY AN
AUTHORIZED AND CERTIFIED DEALER.
For the nearest authorized and certified dealer, call Stanley Hydraulic Tools at the number listed on the back of this
manual and ask for a Customer Service Representative.
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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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SAFETY PRECAUTIONS
WARNING
Do not operate the breaker unless the
following safety instructions have been
thoroughly read and understood! Read this
manual before installing, operating or
maintaining this equipment.
• A flying projectile from the breaker, breaker
tool, rock or other material may enter the
operator's compartment and cause serious
or fatal injury to the operator. Personal
protection equipment must be used.
• A flying projectile from the breaker, breaker
tool, rock or other material may cause
serious or fatal injury to bystanders. Never
operate the breaker when bystanders are in
the work area.
• On some machines/carriers, the breaker
can enter the operator's compartment if it
breaks loose and swings toward the
operator. Make sure that suitable impact
shields are used when operating the
breaker with this type of equipment.
• Do not operate the breaker unless all safety
decals described in this manual are in
place. The decals must be inspected
periodically to ensure that all wording is
legible. The decals must be replaced if
illegible. Replacement decals can be
obtained from your authorized Stanley
Distributor.
• When operating the breaker you must use
ear protection, eye protection, and
breathing protection.
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SAFETY PRECAUTIONS
Tool operators and maintenance personnel must always
comply with the safety precautions given in this manual
and on the stickers and tags attached to the tool and
hose.
OBEY SAFETY RULES
•
•
•
•
Operate the breaker in accordance with all laws and
regulations which affect you, your equipment, and
the work site.
These safety precautions are given for your safety. Re-
view them carefully before operating the tool and before
performing general maintenance or repairs.
Do not operate the breaker until you have read this
manual and thoroughly understand all safety, opera-
tion and maintenance instructions.
Supervising personnel should develop additional pre-
cautions relating to the specific work area and local
safety regulations. If so, place the added precautions in
the space provided in this manual.
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.
The MB656 Mounted Hy-
draulic Breaker will provide
safe and dependable ser-
vice if operated in accor-
dance with the instructions
given in this manual. Read
and understand this man-
ual and any stickers and
tags attached to the tool
and hoses before opera-
tion. Failure to do so could
result in personal injury or
equipment damage.
•
•
Ensure that all maintenance procedures recom-
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.
•
•
Know the limits of your equipment.
Check the rules and regulations at your location. The
rules might include an employer’s work safety program.
Regulations may identify hazards such as working
around utility supply lines or hazardous slopes.
Establish a training program for all operators to en-
sure safe operation.
•
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.
BE THOROUGHLY TRAINED BEFORE
OPERATING THE UNIT ALONE
•
Operator training must start in an area without by-
standers and use all the controls until he/she can
control the machine fully under the conditions of the
work area.
•
When learning to operate a machine, do so at a slow
pace.
KNOW THE WORK CONDITIONS
•
The operator must know any prohibited uses or
work areas for the machine. For example, exces-
sive slopes and poor or dangerous terrain condi-
tions must be avoided.
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SAFETY PRECAUTIONS
•
•
•
•
Do not operate the tool unless thoroughly trained or
under the supervision of an instructor.
•
Do not operate a damaged, leaking, improperly ad-
justed, or incompletely assembled breaker.
Become familiar with the carrier controls before op-
erating the carrier and the 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.
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.
•
•
To avoid personal injury or equipment damage, all
breaker repair, maintenance and service must only
be performed by authorized and properly trained
personnel.
•
•
•
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.
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.
•
•
Keep this manual with the breaker.
Do not operate this equipment if you are taking med-
ication which may affect your mental judgement or
physical performance.
•
•
Stop the engine before attempting to make any re-
pairs, adjustments or servicing to either the carrier
or the breaker.
•
Do not operate this equipment if you are under the
influence of drugs or alcohol.
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.
MB656 User Manual ◄ 7
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TOOL STICKERS & TAGS
Stanley Hydraulic Tools
Division of The Stanley Works
3810 SE Naef Road
Milwaukie, OR 97267 USA
MODEL NO:
SERIAL NO:
72074
Grease Sticker
OPERATING WEIGHT:
INPUT FLOW:
66219
CIRCUIT RELIEF PRESSURE:
Guaranteed Sound Power Level
Sticker
41740
CE Specification Plate
PN:73008
70752
Stanley Logo Sticker
47351
Composite Warning Sticker
NITROGEN ONLY
350 PSI
27711
Pressure Spec Sticker—350 psi
PN:73006
73006
MB656 Decal
66764
Made in USA Sticker
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OPERATION
PRE-INSTALLATION INSTRUCTIONS PRE-OPERATION PROCEDURES
SKIDSTEER, BACKHOE OR EXCAVATOR
SIZE
NITROGEN CHARGE
The breaker has been properly charged with nitrogen at
the factory and is ready to use.
Check the Specifications section of this manual to de-
termine correct carrier size, hydraulic flow and pressure
requirements.
TOOL BIT LUBRICATION
Grease the top 10 in. / 250 mm of the breaker tool bit be-
fore installing. During operation, the tool can be greased
through the grease fitting. Grease is required.
WARNING
Make sure the tool bit is against the piston by placing the
tool bit against the ground and then putting down pres-
sure on the breaker. See the illustrations below.
If hydraulic pressure, hydraulic back-pressure,
hydraulic flow or carrier weight class are exceeded,
the tool warranty is void.
Grease
This Area
of Bit
EXISTING EQUIPMENT HYDRAULICS VS.
APPLICATION ATTACHING KITS
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.
10 inches/250 mm
To o l Bi t
Stanley Hydraulic Tools has for many years developed
ATTACHING KITS for adapting to existing hydraulic sys-
tems of many popular carriers.
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.
Figure 1. Greasing the Top of the Tool Bit
WARNING
TEST THE HYDRAULIC SYSTEM
1. Have your Stanley dealer test the carrier hydraulic
system to make sure the system is operating at the
manufacturers specified capacity and pressure rat-
ings.
Greasing the tool bit without down pressure on the
breaker results in grease filling the space between
the piston and the tool bit. When the breaker is next
activated, the piston will strike the grease at a speed
which will pressurize the grease resulting in seal and
grease zerk failure.
2. Be sure the fluid in the hydraulic system is filtered
to at least 10 micro-meters. (Particles found in fluid
should not exceed 10 micro-meters in size.)
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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OPERATION
2. With the carrier at idle and the breaker suspended
in the air or with minimal down pressure, turn on the
breaker to gradually warm up its internal compo-
nents.
Piston in Down Position
Against Tool Bit
Tool Stop
3. When the hydraulic system and breaker are warm,
proceed with operation.
Lower Bushing
Tool Bit
LONG TERM STORAGE
1. Remove the tool bit, clean the tool stop and the low-
er bushing. Thoroughly coat the surfaces of the tool
stop and the lower bushing with grease.
2. 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.
Piston Not Against
Tool Bit Leaving Space
Between the Piston and
Bit
Grease Will Fill
This Space
3. Store the breaker in a vertical position. Do not store
the breaker horizontally for extended periods.
Tool Stop
Lower Bushing
OPERATING A BREAKER
PREPARATION FOR USE
Read the section in this manual titled Pre-Operation Pro-
cedures before operating a breaker. Failure to follow the
preparation instructions can result in severe damage to
the breaker and carrier and void the warranties of both.
Tool Bit
Figure 2. Positioning the Tool Bit with Lubrication
POSITIONING THE CARRIER
SECURING THE TOOL BIT
SKIDSTEER LOADERS
1. The tool retainer is shipped installed in the breaker
(see parts illustration).
With the breaker tool in place on the material to be
worked, position the skidsteer loader arms and the
breaker bracket so the breaker is almost vertical and the
front tires of the skidsteer are off of the ground.
2. Drive out the tool retainer using a punch and ham-
mer.
Keep lowering the loader arms as the tool penetrates
the work material so the skidsteer weight stays on the
tool. The breaker is more efficient when adequate down
force is applied.
3. Grease the top area of the tool bit as shown in Fig-
ure 1.
4. Install the tool bit making sure the notch is aligned
with the lower body retainer pin hole.
5. Install the tool retainer.
WARNING
Always wear eye protection when installing or
removing the tool retaining pin.
LOW TEMPERATURE WARM-UP
PROCEDURE
1. After starting the carrier, warm-up the hydraulic sys-
tem at engine idle until hydraulic lines are warm to
the touch.
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OPERATION
Apply down force.
Figure 5. Excavator
POSITIONING THE BREAKER TOOL ON
THE WORK MATERIAL
Figure 3. Skidsteer Loader
BACKHOES
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.
With the breaker tool in place on the material to be
worked, position the backhoe so the boom is halfway up
(45°) and the dipper holds the breaker almost vertical.
Lower the loader bucket until the weight is off the front
tires.
Apply down pressure.
Figure 4. Backhoe
Break near the edge.
Figure 6. Position the Tool Bit
Apply down force to the boom/dipper until the rear of the
backhoe is raised off the ground. Rear tires and stabiliz-
ers should be off the ground so the total rear weight of
the backhoe is on the breaker tool. The breaker is more
efficient when adequate down force is applied.
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
the edge, the energy will be absorbed into the material
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.
EXCAVATORS
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 the boom
and the breaker.
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OPERATION
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.
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.
Do not break continuously
in one place
Figure 7. Breaking
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.
CAUTION
Continuous penetration 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, mushrooming of the tip of the bit and may
lead to failure of the bit.
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-through” occurs or
if it is apparent that good solid blows are not occurring.
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.
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 breaker should be re-
positioned.
Continuous tool penetration usually does not do much
good. If the material does not break with 3–6 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.
Many materials do not respond well to continued ham-
mering in one place. The breaker tool should be repo-
sitioned on the work each time the tool penetrates but
does not crack the material.
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OPERATION
Always direct the down pressure force in a line toward
the point of tool contact with the work.
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 oxy-acetylene torch
Sorinwihe ake
BLANK FIRING
Figure 8. Scoring with the Breaker
To understand “Blank Firing”, the operator needs to be
aware that the tool bit is able to drop down in the lower
body cavity, far enough so that the piston cannot strike it,
when the tool bit is not in contact with the work surface.
“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 carrier components and
may result in failure of one or more components. Exces-
sive “Blank Firing” may be considered equipment abuse
and may result in voiding warranties.
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.
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 position, the
piston 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 carrier boom components. “Blank Firing” of this
type can be experienced in trench work where obtain-
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.
Figure 9. Breaker Tool Bit Binding
CAUTION
“Blank Firing” as a result of operator error occurs when
the tool bit is not in contact with the work surface to be
broken and is allowed to drop down in the lower body
cavity 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 ab-
sorbed by breaker components and excavator boom
components. “Blank Firing” of this type can be experi-
enced 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.
Do not pry with bit and breaker. The tool bit may
break causing injury.
Excessive side force cocks the tool in its bore, prevents
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 components.
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OPERATION
While “Blank Firing” cannot always be avoided, it can be
kept to a minimum by avoiding the above conditions as
much as possible.
CAUTION
UNDERWATER USAGE
No part of the breaker may be submerged in
water. Underwater usage of the breaker will cause
internal damage to the breaker. Consult Stanley for
modifications and specific warranty coverage if you
have an underwater requirement.
Underwater usage of the breaker will cause damage
to internal components. Even if the breaker is partially
submerged, water is introduced to an area between the
tool bit and piston. On the piston down cycle, the water
becomes compressed and damages adjacent compo-
nents.
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 chart shows the
air flow rate and pressure required for various depths of
operation.
Air Flow Rate/
Depth/Feet
Pressure/PSI
cfm
69
60
52
44
39
35
31
27
23
18
60
50
40
30
25
20
15
10
5
53
44
35
27
22
18
13
9
Do not use underwater without supplying air to breaker
Figure 10. Underwater Restrictions
4
0
0
GREASE THE BIT
Grease should be applied to the upper end of the break-
er tool bit each time it is installed. Thereafter, the tool
should be greased at the fitting to reduce wear in the
lower body and bushings of the tool. See Greasing The
Tool Bit in the sections titled Pre-Operation Procedures.
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TROUBLESHOOTING
This section describes how to find and resolve problems If symptoms of poor performance develop, the following
users may experience. If a situation occurs that is not chart can be used as a guide to correct the problem.
covered, call your Stanley Customer Service represen-
tative for assistance.
When diagnosing faults in operation of the tool, always
check that the hydraulic power source is supplying the
correct hydraulic flow and pressure to the tool as listed
in the table below. Use a flowmeter known to be accu-
rate. Check the flow with the hydraulic oil temperature at
WARNING
least 80 °F/27 °C.
Inspecting the tool or installing parts with the
hydraulic hoses connected can result in severe
personal injury or equipment damage. To prevent
accidental startup, disconnect the hydraulic power
before beginning any inspection or installation task.
PROBLEM
CAUSE
SOLUTION
Breaker will not fire.
Low hydraulic oil level.
No flow to breaker.
Main relief set low.
Fill reservoir.
Have hydraulic circuit tested by
authorized dealer/distributor per
approved procedure.
Internal damage.
Have unit serviced by an authorized
dealer/distributor.
Damaged quick couplers.
Low hydraulic flow
Replace.
Breaker runs slowly.
Have hydraulic circuit tested by an
authorized dealer/distributor per
approved procedure.
Excessive heat build up.
Excessive nitrogen pressure.
Internal leakage.
Have unit serviced by an authorized
dealer/distributor.
Breaker runs erratically.
Low or excessive back-pressure.
Damaged switch or connection.
Relief set too low.
Have carrier serviced by an authorized
dealer/distributor.
Internal damage.
Tool binding.
Add grease to tool shank. Do not pry
while operating.
Breaker runs but at reduced
power.
Low accumulator charge.
Excessive back-pressure.
Relief set too low.
Have unit serviced by an authorized
dealer/distributor.
Breaker leaks oil around tool bit
and tool bushing.
Lower seals failed.
Have unit serviced by an authorized
dealer/distributor.
Hydraulic system overheats.
Main relief set low.
Have unit serviced by an authorized
dealer/distributor.
Insufficient cooling capability in
hydraulic circuit.
Line/hose size too small.
Excessive back-pressure.
MB656 User Manual ◄ 15
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MAINTENANCE
DAILY MAINTENANCE CHECKS
•
Check for loose or missing fasteners. Tighten or re-
place as needed.
•
•
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.
15 inches
TOOL STOP AND 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 part must be replaced.
The extent of wear of the tool stop and lower bushings
and the tool bit can be checked by moving a NEW tool
bit back and forth and measuring the gap between the
tool bit and the lower bushing. If the gap is more than
.250 in./6 mm, the upper bushing, lower bushing and
tool bit should be replaced. A gap in excess of .250 in./6
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
recommended to replace ALL worn components.
Figure 11. Measuring Tool Bit Gap
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CHARGING THE ACCUMULATOR
The tools required to charge the breaker accumulator NOTE:
are the Charge Hose assembly (505232) and the Ac-
cumulator Tester (28257), which are used with other
Stanley model breakers. When charging the accumula-
tor, make sure the tools and charge valve is clean. Dirt
can contaminate the charge valve and cause leakage.
When disengaging the tester a “POP” of nitrogen is
normal.
6. 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.
7. 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.
2. Hold the chuck end of the tester and turn the gauge
fully counter clockwise to ensure the plunger inside
the chuck is completely retracted.
3. 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.
8. 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. Turn the gauge clockwise to advance the plunger
until a pressure is indicated on the gauge. Do not
overtighten.
5. If the pressure is correct, unscrew the gauge to re-
tract the plunger. Then, loosen and remove the tes-
ter from the charge valve. If the pressure is not cor-
rect, proceed to Step 6.
CHARGE PRESSURE SPECIFICATION
Main Accumulator:
350 PSI +/- 10 PSI
24 BAR +/- .7 BAR
Main Accumulator
P/N 28257 Tester
P/N 505232 Charge Hose Assy
MB656 User Manual ◄ 17
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FLOW CONTROL KIT INSTRUCTIONS
The Flow Control Kit is an option for Skid Steer Models.
HOSE ROUTINGS
The Flow Control Kit regulates the flow from the skid
steer hydraulics to the breaker to prevent over-speeding
of the breaker. Follow the instructions below to install
the kit.
R = Return. Route to the breaker OUT port.
S = Supply. Route to the breaker IN port.
P = Pressure. Route to the tractor’s hydraulic pressure.
T = Tank. Route to the tractor’s hydraulic reservoir.
•
Install the flow control block between the breaker and
the loader’s hydraulics using the 7/16 in. capscrews,
washers, and nuts provided. (Torque to 41 ft-lbs)
•
Connect the hoses.
The parts list for the Flow Control Kit is shown below.
S
5
4
3
R
2
P
T
1
6
8
7
Figure 13. Flow Control Kit
ITEM
NO.
PART
NO.
QTY DESCRIPTION
1
2
3
4
5
34621
34839
371516
02773
58653
1
6
3
4
1
FLOW CONTROL BLOCK
WASHER
NYLOCK NUT
ADAPTER
ORIFICE LOCATED UNDER
FITTING DESIGNATED AS "S"
6
7
8
58652
58654
58655
3
2
2
CAPSCREW
HOSE
HOSE
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WEAR TOLERANCES
NEW
REJECT LIMIT
LOWER BUSHING (ITEM 48)
3.015 in. / 76.6 mm
3.130 in. / 79.5 mm
FIGURE 14. LOWER BUSHING
B
Wear Areas
TOOL STOP (ITEM 42)
A
A) 3.015 in. / 76.6 mm
Inside Diameter
A) 3.130 in. / 79.5 mm
Inside Diameter
C
C=Measure at 1.2 in./30 mm
FIGURE 15. TOOL STOP
B) .60 in. / 15.2 mm
Depth
B) .48 in. / 12 mm Depth
RETAINER PIN (ITEM 20)
2.118 in. / 53.8 mm
Outside Diameter
2.033 in. / 51.6 mm
Outside Diameter
FIGURE 16. RETAINER PIN
RETAINER PIN (ITEM 43)
.75 in. / 19 mm
.67 in. / 17 mm
Outside Diameter
Outside Diameter
PISTON
Wear Limit
2.595 in. / 66 mm Depth
2.905 in. / 73.8 mm
New Part
FIGURE 17. PISTON
MB656 User Manual ◄ 19
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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 18. 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 19. 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 23. Fatigue Failures
Figure 20. 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 21. 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 24. 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 22. Extreme Down Pressure Breakage
MB656 User Manual ◄ 21
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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 25. 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 26. Diagram of Tool Bit Failures
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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.
MB656 User Manual ◄ 23
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FLOW TEST PROCEDURES
The correct performance of this procedure will verify if 5. Close the restrictor valve on the flow meter until the
the auxiliary circuit of the carrier is adequate to properly
operate a Stanley attachment.
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.
This procedure is generic in form. It is the end users
responsibility to ensure that this procedure will work with
his specific type of equipment.
If an adequate flow meter is not available contact your
Stanley Hydraulic Distributor for assistance.
NOTE:
The relief valve pressure must be greater than the
operating pressure of the attachment and three
times the back-pressure. Never use the relief valve
to control the flow rate in the circuit. Cracking pres-
sure means the loss of 4 or more GPM.
TEST PROCEDURE
1. With the auxiliary circuit (or kit) completely installed
connect the flow meter between the tool inlet and
outlet hoses.
Record the relief cracking pressure
Example:
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.
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.
2. With the machine setting at the mode that’s going to
be used to operate the attachment record the GPM
_____.
Operating Pressure
Back-pressure
2700 psi
450 psi
Locate the correct flow for the attachment in the
manual under the specification section. Adjust the
machine to the correct GPM.
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.
NOTE:
If possible, always set the machine to the highest
GPM output mode. This will prevent the operator
from over flowing the attachments.
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.
Excessive back-pressure will slow the attachments
operation and lead to premature seal failures and
over heating.
Record the back-pressure
psi.
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FLOW TEST PROCEDURES
TROUBLESHOOTING
HEAT LOAD TEST
If adequate pump flow is available from the carrier
pump(s) but is not getting to the attachment, consult
your service representative and review the following:
With the installation kit properly installed and adjusted
per the above procedure, conduct the heat load test as
follows.
3. Attachment valve(s) are not actuating. Review all
electrical connections that are part of the attach-
ment kit.
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.
4. Ensure proper voltage to the valve(s).
5. Ensure the REG port of the valve is not blocked.
6. Check to make sure the carriers main relief is set
to the manufacturers recommendation and that this
value is equal or greater than the attachment circuit
relief.
NOTE:
Closing of the restrictor may be required as the tem-
perature increases.
7. If the valve will not turn off, check the drain (tank)
line of the valve to ensure that the pressure is 50
psi or less.
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.
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.
Example:
Stabilized Temperature
Ambient Temperature
Heat Rise
160°
-80°
80°
The normal operating temperature range of this circuit
will be the typical ambient temperature range for the
geographical area plus the heat rise calculated above.
Ensure that the operating temperature range is lower
than 180° for optimum operation of the attachment.
MB656 User Manual ◄ 25
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DEFINITIONS
Tool:
The hydraulic attachment that the auxiliary circuit is intended to power. These
may include hydraulic breakers, compactors, shears, etc.
Operating Pressure:
That pressure at which the tool will naturally operate without influence of out-
side pressure relief mechanisms. This pressure is an operating characteristic
of the tool and cannot be altered by the end user without changing the tool
design.
Relief Pressure:
The relief pressure is that pressure at which the circuit will dump fluid in order
to protect itself from damage.
Back Pressure:
Flow Meter:
The pressure at the tool’s connection to the return circuit of the carrier.
Instrument for testing the operating characteristics of a hydraulic circuit. The
data usually available from this device are pressure (psi/bar), flow (gpm/lpm)
and temperature (°F/°C).
Restrictor Valve:
A valve on the flow meter which allows the user to simulate an operating tool
by adding a pressure load (through restriction) to the circuit. This feature is
used to evaluate relief settings and flow ratings at pressure.
V60/V65/V100 Valves:
A priority flow control valve manufactured by Stanley Hydraulic Tools. Allows
for optimum operation of any attachment by providing the proper amount of
flow for operation of the tool the “priority” aspect allows the attachment to func-
tion properly if another control function is activated.
Inlet Flow:
The hydraulic oil supplied to the IN port of the tool or valve.
Regulated Flow:
By-Pass Flow:
The flow of oil supplied to the tool by the V60/V100 valve.
The oil flow that is supplied by the carriers pump, but not used in the opera-
tion of the attachment. By-pass flow equals inlet flow (to the valve) minus the
regulated flow.
Pressure Line:
The hydraulic line(s) that supply pressurized oil from the pump to the valve or
tool.
Return Line:
The hydraulic line that connects the OUT port of the tool to the tank circuit of
the carrier.
Cracking Pressure:
Full Open Pressure:
The pressure at which the relief valve starts to open. Can be seen by a drop in
the flow rate as shown by the flow meter.
The pressure at which the relief valve is completely open dumping all system
flow to the tank.
Ambient Air Temperature:
Stabilized Temperature:
The temperature of the outside air.
The temperature at which the carrier hydraulic system temperature will stop
rising during testing or operation.
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SPECIFICATIONS
DIMENSIONS AND WEIGHTS
Weight w/Tool Bit, & Mounting Bracket.................................................................................................872 lbs/396 kg
Length w/Tool Bit & Mounting Bracket.............................................................................................66.5 in./1689 mm
Tool Working Length.............................................................................................................................18 in./457 mm
Tool Diameter ...........................................................................................................................................3 in./76 mm
Hydraulic Pressure (working) ......................................................................................... 1700–1900 psi/117–131 bar
Flow Range
Minimum...........................................................................................................................................16 gpm/60 lpm
Maximum..........................................................................................................................................24 gpm/91 lpm
System Relief (min. cracking)...........................................................................................................2500 psi/172 bar
Return Line Pressure (max.) ................................................................................................................350 psi/24 bar
Operating Oil Temperature (max.).......................................................................................................... 190 °F/88 °C
Adapter Fitting Size.............................................................................................................................-12 SAE O-ring
Recommended Min. Hose ID ............................................................................................................................3/4 in.
Blows Per Minute......................................................................................................................... 600 min./1000 max.
Impact Energy Class .......................................................................................................................... 875 ft lb/1200 J
Sound Power Level ....................................................................................................................................... 121 dBA
Carrier Size (Skidsteer) .............................................................................................12000-14400 lb / 5448-6538 kg
Carrier Size (Mini Excavator).......................................................................................9100-20000 lb / 4131-9000 kg
Carrier Size (Backhoe) ................................................................................................9100-20000 lb / 4131-9000 kg
TORQUE TABLE
Item No.
Illustration
Power Cell
Power Cell
Power Cell
Power Cell
Housing
Description
Hollow Hex Plug -12 SAE
Tie Rod Nut
Apply
Ft/Lb
150
650
80
Nm
203
881
108
115
617
617
271
46
32
6
Loctite™ 242
Kopr Kote™
Loctite™ 242
Loctite™ 242
Kopr Kote™
Kopr Kote ™
Anti-Seize
Charge Valve
Capscrew
13
60
58
11
85
Capscrew
455
455
200
Housing
Nut
Power Cell
Accumulator Cap
NOTES FOR ITEM 30 ASSEMBLY:
•
•
•
•
Tighten in a cross pattern.
Thread into nut by hand.
Thread tie rod into nut by hand.
Use Loctite™ to prevent plug from falling out. If plug falls out, the housing will fill with grease. The power cell
must be removed to repair.
NOTE: Weights, dimensions and operating specifications listed on this sheet are subject to change with-
out notice. Where specifications are critical to your application, please consult the dealer.
MB656 User Manual ◄ 27
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ACCESSORIES
Description
Tool Bits
Part No.
Conical...............................................................................................................................................................28123
Blunt ..................................................................................................................................................................28126
Chisel, Line-cut..................................................................................................................................................58124
Chisel, Cross-cut ...............................................................................................................................................28125
Tamping Pad Assy. ............................................................................................................................................18942
Miscellaneous
Attaching Kits.......................................................................................................................................Consult Dealer
Adapter Assembly..............................................................................................................................................33300
Charge Hose Assembly (Includes Valve and Hose for Nitrogen Tank & Charge Valve Connections).............505232
Charge Kit Assembly (Includes P/N 505232, 28257 and 372047 Charge Kit Box)...........................................34892
Accumulator Tester............................................................................................................................................28257
Service Kit (For Rebuild MB556, 656, 856, 956, 10).........................................................................................40373
Hose Guard Kit, 20 degree, Bolt on Skidsteer...................................................................................................59096
Conversion Kit to Adapt Breaker to Skidsteer ...................................................................................................56599
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MB656 POWER CELL ILLUSTRATION
MB656 User Manual ◄ 29
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HOUSING PARTS ILLUSTRATION
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MB656 PARTS LIST
PART
ITEM NO.
PART
ITEM NO.
QTY DESCRIPTION
POWER CELL BLANK FIRE
QTY DESCRIPTION
1
60730
27942
24488
32165
01605
32165
03709
24502
08104
24112
56553
00354
00701
16549
22398
24486
24487
24495
24500
24501
24508
24512
24518
27646
27647
27648
27649
28128
28129
28130
28222
24516
34371
350818
60711
24492
1
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
1
1
1
4
1
1
1
1
1
1
4
4
4
4
4
1
1
1
1
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
58
59
60
61
62
63
64
65
09728
09764
22980
24484
24494
65039
350041
350223
372003
60715
51255
27711
51264
70752
73006
72074
47351
41740
22181
17559
30949
24491
66219
02112
02773
66764
29391
2
2
2
1
2
4
2
3
1
1
1
1
1
2
2
1
1
1
8
16
8
1
1
1
1
1
1
PIN RETAINER SPRING
PIN RETAINER
2
MAIN BODY ASSY (INCL 3–11)
MAIN BODY
3
RETAINER SPRING
TOOL STOP
4
CHARGE VALVE ASSY (INCL 5–7)
O-RING
5
RETAINER PIN
6
CHARGE VALVE
PLUG
ROLL PIN
7
PLUG
8
VALVE SLEEVE
HOLLOW HEX PLUG -6 SAE
O-RING
PLUG
9
GREASE FITTING, 1/8 NPT
LOWER BUSHING
LOWER BUMPER
PRESSURE SPEC STICKER, 350 PSI
HOUSING WELDMENT
STICKER, STANLEY LOGO
STICKER, MB656
GREASE STICKER
STICKER, COMPOSITE WARNING
CE SPECIFICATION PLATE
NYLOCK NUT
10
11
12
13
14
15
16
18
19
20
21
22
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
PLUG
O-RING*
CAPSCREW
DOWEL PIN
O-RING*
PISTON SLEEVE
SEAL CARRIER
SPOOL
TOOL RETAINER PIN
VALVE CAP
WASHER
O-RING*
CAPSCREW
O-RING*
UPPER BUMPER
O-RING*
GUARANTEED SOUND PWR DECAL
ADAPTER 3/4 SAE
STD THD CONN 12
MADE IN USA DECAL
SEAL KIT
SYMMETRICAL SEAL*
ROD WIPER*
ROD SEAL*
MODIFIED QUAD RING*
TIE ROD
* Denotes Part in Seal Kit
LOCK PLATE
TIE ROD NUT
CAP, DIP MOLDED VINYL
TIE ROD NUT
PISTON
O-RING*
LOWER BODY ASSY (INCL 38–48)
LOWER BODY
MB656 User Manual ◄ 31
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MB656 MOUNTING BRACKETS
14" Pin Centers Mounting Bracket
P/N 30913 (MB65607)
Wain Roy Mounting Bracket
P/N 39056 (MB65609)
XChange Adapter
P/N 49309 (MB656XC)
Elbow
Skidsteer Mounting Bracket
P/N 56535
P/N 05967
Coupler
P/N 40092
40093
Adapter
P/N 02773
32 ► MB656 User Manual
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Stanley Hydraulic Tools
3810 SE Naef Road
Milwaukie, Oregon 97267
503-659-5660 / Fax 503-652-1780
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