Stanley MB256 User Manual Download Page 33

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MB256 User

Manual ◄ 33

Item

MB256

Qty

Description

65918

Hose Assy

65918

Hose Assy

28400

Boom Pin

372089

Lynch Pin

371053

Washer

32387

Adapter Weldment Bracket

380522

Hose Clamp

34839

Washer

34837

Capscrew

371516

Nut

380526

Grommet

Item

MB256

Qty

Description

02773

Adapter

74707

STANLEY Decal (not pic-

tured)

28393

Side Plate Bushing (see

note at top of page)

40092

Coupler, Male -Not pictured

65811

Coupler, Female -- Not

pictured

MB25600SS MODEL MOUNTING BRACKETS

NOTE: The MB25600SS Model

comes with 2 additional adapt-

ers P/N-02773 and one male

coupler P/N-40092 & one fe-

male coupler P/N-65811 that

are not pictured here.

NOTE: If you are trying to convert an MB25600 to use

on a skid steer bracket you will need to order item # 15

side plate bushings, these bushings require a press fit.

Summary of Contents for MB256

Page 1: ... 2015 STANLEY Black Decker Inc New Britain CT 06053 U S A 30341 3 2019 Ver 42 USER MANUAL Safety Operation and Maintenance MB256 MOUNTED HYDRAULIC BREAKER ...

Page 2: ......

Page 3: ...LD 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 certified dealer call STANLEY Infrastructure at 503 659 5660 and ask for a Customer Service Representative SAFETY SYMBOLS 4 SAFETY PRECAUTIONS 5 TOOL STICKERS TAGS 8 OPERATION 9 TROUBLESHOOTING 15 MAINTENANCE 16 CHARGING THE ACCUMULA...

Page 4: ... messages that follow this symbol to avoid possible injury or death This safety alert and signal word indicates an imminently hazardous situation which if not avoided will result in death or serious injury This safety alert and signal word indicates a potentially hazardous situation which if not avoided could result in death or serious injury This safety alert and signal word indicates a potential...

Page 5: ...r 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 t...

Page 6: ...operation and maintenance instructions The operator must be familiar with all prohibited work areas such as excessive slopes and dangerous terrain conditions Do not operate the breaker until you read the carrier equipment manual and thoroughly understand all safety operation and maintenance instructions The word carrier as used in this manual means a backhoe or excavator or similar equipment used ...

Page 7: ...nce Do not operate a damaged leaking improperly adjusted or incompletely assembled breaker Do not modify the breaker in any manner Use only tool bits supplied by STANLEY Use of tool bits supplied by another manufacturer may damage the breaker and will void the warranty To avoid personal injury or equipment damage all breaker repair maintenance and service must be performed by authorized and proper...

Page 8: ...TROGEN ONLY 1000 PSI 34522 Accumulator Pressure Sticker 1000 PSI 66218 Sound Power Level 126 dBA 73004 MB256 Decal NITROGEN ONLY 300 PSI 56595 Accumulator Pressure Sticker 300 PSI 66764 Made in USA Decal PN 73004 72074 Grease Sticker 74705 STANLEY Decal 74707 Used on Mb25600SS Only STANLEY Decal TOOL STICKERS TAGS ...

Page 9: ... 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 PRE OPERATION PROCE...

Page 10: ...the hydraulic system and breaker are warm proceed with operation LONG TERM STORAGE 1 Remove the tool bit clean the tool stop and the lower 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 I...

Page 11: ...NING 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 Break near the edge Figure 6 Position the Tool Bit On flat material or rock the br...

Page 12: ...ow means that solid blows are not occurring and breaker should be repositioned 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 penetration The time used for additional penetration could be better used to strike blows in another place Many materials do not respond well to continued hammerin...

Page 13: ...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 position the piston strikes the tool bit and the tool bit in turn is driven against the retai...

Page 14: ...e 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 UNDERWATER USE No part of the STANLEY MB256 Breaker may be submerged in water without first modifying the breaker for underwater use Use of the breaker underwater requires an underwater application kit and an air compressor capable of producin...

Page 15: ... shank Do not pry while operating Breaker runs but at reduced power Low accumulator charge Have unit serviced by an authorized dealer distributor Excessive back pressure Relief set too low 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 dea...

Page 16: ...ol 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 ...

Page 17: ...d 3 Screw the tester into the breaker charge valve by turning the chuck Do not use the gauge for turning as this will advance the plunger in the chuck Tighten the chuck lightly against the breaker charge valve 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 retract the plunger Then loo...

Page 18: ...rque to 41 ft lbs Connect the hoses The parts list for the Flow Control Kit is shown below HOSE ROUTINGS 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 4 R S P T 3 5 8 2 1 6 7 ITEM NO PART NO QTY DESCRIPTION 1 34621 1 FLOW CONTROL BLOCK 2 34839 6 WASHER 3 371516 3 NY...

Page 19: ...ter B 60 in 15 2 mm Depth B 48 in 12 mm Depth RETAINER PIN ITEM 17 1 745 in 44 mm Outside Diameter 1 66 in 42 mm Outside Diameter RETAINER PIN ITEM 16 25 in 6 mm Outside Diameter 18 in 4 6 mm Outside Diameter PISTON ITEM 44 1 80 in 46 mm Depth 1 76 in 45 mm LOWER BUSHING RETAINER PIN TOOL STOP Wear Areas C Measure at 1 2 in 30 mm A B C PISTON New Part Wear Limit WEAR TOLERANCES ...

Page 20: ...een 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 allowances Worn out retainer pins will cause uneven loading on the pins themselves causing failure of the tool or retainer pins This will also cause excessive wear to the front bushings METAL TO METAL CONTACT Extre...

Page 21: ...tigue failures take many forms but they all exhibit similar features Generally the broken surface is brittle and has a lip like that in the bending failure even though in some cases the lip has been broken Figure 23 Fatigue Failures CORROSION Tools should be greased and stored out of the weather Corrosion tends to accelerate the fatigue fractures of the tool MUSHROOMING Driving the tool into a har...

Page 22: ...heat Look for surface cracks galling or gouge marks Breaks 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 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 ...

Page 23: ...to hard rock Its pencil type point is used to fracture the material The tool is best where penetration speed is important CHISEL This style of point is used generally used for trench work where a controlled break is required 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 fract...

Page 24: ... 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 specification section in the manual Adjust attachment relief to specification 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 co...

Page 25: ...ING If adequate pump flow is available from the carrier pump but is not getting to the attachment consult your service representative and review the following 1 Attachment valve s are not actuating Review all electrical connections that are part of the attachment kit 2 Ensure proper voltage to the valves 3 Ensure the REG port of the valve is not blocked 4 Check to make sure the carriers main relie...

Page 26: ...sure V60 V65 V100 Valves A priority flow control valve manufactured by STANLEY 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 function properly if another control function is activated Inlet Flow The hydraulic oil supplied to the IN port of the tool or valve Regulated Flow The flow of oil ...

Page 27: ...ax 200 psi 13 8 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 700 min 1200 max Impact Energy Class 350 ft lb 475 J Sound Power Level 122 dBA Carrier Size Skidsteer 3000 7000 lbs 1362 3178 kg Carrier Size Mini Excavator 4000 10000 lbs 1816 4500 kg Carrier Size Backhoe 4000 10000 lbs 1816 4500 kg Note Weights dimension...

Page 28: ...ons 505232 Charge Kit Assembly Includes p n 505232 28257 and 372047 Charge Kit Box 34892 Accumulator Tester 28257 Puller 40374 Conversion Kit to Adapt Breaker to Skidsteer 56599 Seal Installation Tool 29560 Piston Sleeve Installation Tool 29564 O Ring Tool Kit 04337 Lifting Ring 372110 TORQUE TABLE Item No Illustration Description Apply Ft Lb Nm 61 Power Cell Tie Rod Kopr Kote 500 678 58 Power Cel...

Page 29: ...1 22 23 24 25 26 27 15 20 16 28 29 29 30 31 34 35 36 37 38 39 40 21 22 32 33 32 32 32 41 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 23 27 MB256 POWER CELL PARTS ILLUSTRATION 58 59 Valve Assembly Accumulator Assembly 57 Power Cell Assembly 60 Surge Accumulator Assembly ...

Page 30: ...R MANIFOLD 26 22966 1 VALVE CAP 27 350223 4 HOLLOW HEX PLUG 12 SAE 28 350237 2 HOLLOW HEX PLUG 29 350041 5 HOLLOW HEX PLUG 30 23012 2 O RING 31 34020 1 ACCUMULATOR SCREEN 32 23011 4 SPIROL PIN 33 372003 1 GREASE FITTING 34 32165 1 CHARGE VALVE ASSY 35 34101 1 LOCKPLATE 36 34113 1 LOCK TAB 37 34100 1 RETAINING RING 38 22999 1 ROD SEAL 39 23000 1 ROD WIPER 40 00961 1 PIPE PLUG 41 22978 2 DOWEL PIN 4...

Page 31: ...995 4 RETAINING RING EXTERNAL 8 34522 1 PRESSURE SPEC STICKER 1000 PSI 9 37916 4 SIDEPLATE NUT 10 38718 1 POWERCELL ASSY 11 47351 1 DECAL COMPOSITE WARNING 12 47352 2 DECAL LIFT POINT 13 56595 1 PRESSURE SPEC STICKER 300 PSI 14 62374 4 SIDEPLATE BOLT Item Part Qty Description 15 66218 1 GUARANTEED SOUND POWER LEVEL 16 66764 1 DECAL USA ORIGIN 3 17 69523 1 SIDEPLATE WELDMENT LH 18 69524 1 SIDEPLATE...

Page 32: ...3 4 LOCKPLATE 8 27711 1 PRESSURE SPEC STICKER 350 PSI 9 27995 4 RETAINING RING EXTERNAL 11 30949 6 HHCS 7 8 9UNC X 3 000 12 34522 1 PRESSURE SPEC STICKER 1000 PSI 13 37915 4 SIDEPLATE BOLT 14 37916 4 SIDEPLATE NUT 15 38718 1 POWERCELL ASSY Item Part Qty Description 16 47351 1 DECAL COMPOSITE WARNING 17 47352 2 DECAL LIFT POINT 18 56595 1 PRESSURE SPEC STICKER 300 PSI 19 59061 1 SIDEPLATE WELDMENT ...

Page 33: ...4 74707 1 STANLEY Decal not pic tured 15 28393 4 Side Plate Bushing see note at top of page 16 40092 1 Coupler Male Not pictured 17 65811 1 Coupler Female Not pictured MB25600SS MODEL MOUNTING BRACKETS NOTE The MB25600SS Model comes with 2 additional adapt ers P N 02773 and one male coupler P N 40092 one fe male coupler P N 65811 that are not pictured here NOTE If you are trying to convert an MB25...

Page 34: ...DESCRIPTION 2 11016 2 ADAPTER 10 12 F50X S 8 28393 4 SIDEPLATE BUSHING 9 28400 2 BOOM PIN 13 40092 1 COUPLER F F MALE 18 65811 1 COUPLER F F FEMALE 21 69520 1 Q TACH MTG BRKT 24 69525 1 HOSE 451TC 06 06 12 10 10 47 W SL 25 69525_ 1 HOSE 451TC 06 06 12 10 10 47 W SL 31 371053 4 WASHER 1 3 4 I D 32 372089 4 LYNCH PIN ...

Page 35: ......

Page 36: ...STANLEY Infrastructure 6430 SE Lake Road Portland Oregon 97222 USA 503 659 5660 Fax 503 652 1780 www stanleyinfrastructure com ...

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