New Holland MH2.6, Repair Manual

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Page 2: ...AIR MANUAL The complete Repair Manual consists of two vol umes MH2 6 MH3 6 Repair Manual Wheel Excavators MH2 6 MH3 6 Repair Manual Engine The Repair Manuals for Wheel Excavators and Engine contain the necessary technical informa tion to carry out service and repair on machine and on engine necessary tools to carry out those op erations and information on service standard on procedures for connect...

Page 3: ...complete observance of one simple rule would prevent many thousands of serious injuries each year This rule is never attempt to clean lubricate or adjust a machine while it is in motion WARNING Before carrying out any maintenance operation adjustment and or repair on machines equipped with attachments controlled hydraulically or mechanically make sure that the attachment is lowered and safely set ...

Page 4: ...R With specific warnings about potential dangers for the operator s or other persons integrity directly or indirectly involved The non compliance with the warning preceded by the above mentioned key words WARNING and DANGER can cause serious accidents or even the death of the persons involved Moreover in the present Manual have been given some instructions preceded by the words NOTE and CAUTION NO...

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Page 6: ... 4 TRANSPORT DIMENSIONS 20 5 5 BUCKET USEFULNESS DEPENDING ON ARM 24 6 FILLING CHART 26 SECTION 04 UPPER STRUCTURE 1 UPPER STRUCTURE 1 2 MAIN FRAME AND COUNTERWEIGHT 5 3 POWER UNIT 9 3 1 ENGINE 10 4 RADIATOR 12 5 HYDRAULIC PUMPS 14 5 1 MAIN PUMP 15 5 2 DOUBLE PUMP WITH GEARS 49 6 AIR CLEANER 61 7 EXHAUST SILENCER 62 8 HYDRAULIC OIL TANK 64 9 FUEL TANK 66 10 FUEL TRANSFER PUMP 67 11 GUARDS AND COVE...

Page 7: ...227 6 LATERAL STABILIZERS 228 SECTION 06 FRONT ATTACHMENT 1 INTRODUCTION 1 2 CYLINDER REMOVAL AND INSTALLATION 6 2 1 BUCKET CYLINDER 6 2 2 ARM CYLINDER 10 2 3 POSITIONING CYLINDER 14 2 4 BOOM CYLINDER 19 3 MH2 6 CYLINDERS 24 3 1 BUCKET CYLINDER 24 3 2 ARM CYLINDER 31 3 3 POSITIONING CYLINDER 38 3 4 BOOM CYLINDER 45 4 MH3 6 CYLINDERS 52 4 1 BUCKET CYLINDER 52 4 2 ARM CYLINDER 59 4 3 POSITIONING CYL...

Page 8: ... COMPONENTS LOCATION AND OPERATION 3 4 UNDERCARRIAGE ELECTRIC COMPONENTS 6 4 1 MACHINE WITH FOUR STEERING WHEELS 6 4 2 MACHINE WITH TWO STEERING WHEELS 7 5 CONTROL UNITS ELECTRIC SYSTEM 7 6 LIGHT AND BEAMS GROUP 8 7 GAUGES AND CONTROLS 9 7 1 DASHBOARDS 9 7 2 CONTROL LEVERS 11 7 3 SWITCHES AND CONTROL LIGHTS PANEL 12 7 4 SWITCHES AND WARNING LAMPS 13 7 5 MONITOR PANEL 14 7 6 KEY START SWITCH 26 7 7...

Page 9: ...3 6 7 3 1 TABLE OF EXCAVATOR STANDARD PERFORMANCES 7 3 2 HYDRAULIC COMPONENTS STANDARD PERFORMANCE 9 3 3 MAIN PUMP P Q CURVE 10 4 PREPARATION FOR PERFORMANCE TEST 11 5 EXCAVATOR PERFORMANCE TEST 13 5 1 ENGINE PERFORMANCE 13 5 2 SWING PERFORMANCE 14 5 3 FRONT ATTACHMENT PERFORMANCE 18 5 4 CONTROL LEVERS 21 6 BOOM SLEW PERFORMANCE 22 6 1 COMBINED SLEW BOOM TEST 22 6 2 STEERING 23 6 3 BRAKES SYSTEM 2...

Page 10: ...1 INTRODUCTION 1 1 1 FOREWORD 1 1 2 MANUAL HANDLING 1 SECTION 01 MAIN OPERATING RULES Find manuals at https best manuals com ...

Page 11: ...SECTION 01 MAIN OPERATING RULE S ...

Page 12: ... with a detriment of cost management The information quoted in this service manual are supplied also to be used for training aids Therefore it is advisable to be used in the training of new per sonnel that will be employed in the machine mainte nance All the information illustrations and specifications contained in this service manual are based on the latest product information available at the ti...

Page 13: ...mpliance with the warning preceded by the above mentioned key words WARNING and DANGER can cause serious accidents or even the death of the persons involved Moreover in the present Manual have been given some instructions preceded by the words NOTE and CAUTION with following meanings for machine pro tection NOTE it emphasizes and underlines to the operator the correct technique or correct procedur...

Page 14: ...1 SAFETY PRECAUTIONS 1 2 SAFETY DECALS 41 SECTION 02 SAFETY PRECAUTIONS ...

Page 15: ...SECTION 02 SAFETY PRECAUTIONS ...

Page 16: ...le parts and do not provide solid support Besides controls may be inadvertent ly moved and cause unexpected movement of the machine or its attachments Never operate the machine or its attachments from any position other than sitting in the driver s seat Keep head body limbs hands and feet inside the operator s compartment at all times to reduce expo sure to external hazards Be careful of possible ...

Page 17: ...d signs When backing always look to where the machine is to be moved Be alert of the position of bystanders Should some one enter the work area stop the machine Maintain a safe distance from other machines or ob stacles to ensure required visibility conditions Always give way to loaded machines Maintain a clear vision of the surroundings of the travel or work area at all times Keep cab windows cle...

Page 18: ...ally reduce ground speed and start crossing using also the attachment if necessary only after assessing that ground conditions allow the traverse safely and without risks The gradient you may attempt to overcome is limited by factors such as ground conditions load being handled machine type and speed and visibility There is no substitute for good judgement and expe rience when working on slopes Av...

Page 19: ...death Always ensure that slings and chains used for lifting are adequate to the load and in good condition All loading capacities are referred to the machine on a level surface and should be disregarded when working on a slope Avoid travelling across slopes Proceed from uphill downhill and vice versa If machine starts slipping sideways when on a slope lower the bucket and thrust bucket teeth into ...

Page 20: ...autions should be taken to guarantee work safety All electric lines should be considered as operative live lines even though it might be well known that the line in question is out of work and visibly con nected to the ground The Electric Power Company if previously advised and involved in the work as well as machine Oper ator Owner and or any natural person or legal en tity having rent or leased ...

Page 21: ...ls areas with overhead electric lines and slopes before stopping it at the end of the work ing day Align the upper structure to the tracks in order to al low to easily get on and off the driver s compart ment Move all controls to the position specified for ma chine stopping Refer the Operation and Mainte nance Instruction Manual Never park on an incline without accurately blocking the machine to p...

Page 22: ...l service or maintenance work with the greatest care and attention Shop and or field service platforms or ladders should be manufactured and maintained in accord ance with local or national safety regulations in force Disconnect batteries and label all controls to warn that service work is in progress according to local and national safety regulation requirements Block the machine and all attachme...

Page 23: ...e cannot be avoided securely block the machine and its attach ments Move the machine to level ground as soon as possible Do not twist chains and cables Never use a twisted chain or cable for lifting or pulling Always wear safe ty gloves to handle chains or cables Be sure chains and cables are firmly fastened and that the anchor point is strong enough to withstand the expected load Keep all bystand...

Page 24: ...r hinged covers before performing any mainte nance or repair work in the engine compartment Transfers and transportation Before moving or transporting the machine block upper structure swing to prevent accidental move ment Pay particular attention during transfer on inclines both uphill and downhill Keep the bucket in a posi tion to provide a possible anchor point into the ground in case of slippi...

Page 25: ... open during recharging to improve ventilation Never check battery charge by placing metal objects across the posts Keep sparks or open flames away from batteries Do not smoke near the battery to prevent explosion hazard Before any maintenance or repair make sure that there are no fuel or electrolyte leaks from the batter ies If any correct prior to proceeding with further work Do not recharge bat...

Page 26: ... operations on rims with tyres installed The spare tyre should be inflated only as far as needed to hold the ring parts together remember that when not installed on the disc a tyre inflated to maximum pressure can explode When working on tyres lock previously all wheels front and back ones After lifting machine with hy draulic jack prevent its falling down inserting sup ports according to the safe...

Page 27: ...see this symbol on your machine or in this Manual be alert of the potential for personal injury Follow recommended precautions and safe operat ing practices ENVIRONMENTAL PROTECTION This Manual also contains this symbol accompany ing instructions for correct behaviour as regards en vironmental protection ...

Page 28: ...odifications to the machine may im pair the function and or safety and affect machine life The safety messages in this SAFETY PRECAU TIONS chapter are intended to illustrate basic safety procedures of hydraulic excavators However it is im possible for these safety messages to cover every hazardous situation you may encounter If you have any questions you should first consult your supervi sor befor...

Page 29: ...arry out do not leave anything to the case avoid wearing loose clothing jewelry or other items that can catch on control levers or other parts of the machine To operate the machine in full safety the operator should be completely careful Do not wear radio or music headphones while operating machine Wear close fitting clothing and safety equipment appropri ate for the job PROTECT AGAINST NOISE Prol...

Page 30: ... main tain a three point contact with the steps and hand rails and face the machine Do not use any controls as hand holds Never jump on or off the machine Never mount or dismount a moving machine Be careful of slippery conditions on platforms steps and handrails when leaving the machine ADJUST THE SEAT A seat poorly adjusted for operator or work require ments may quickly fatigue the operator leadi...

Page 31: ...t start the engine by shorting across starter motor terminals before starting the engine ensure that all control levers are in the neutral position DON T CARRY RIDERS ON THE MACHINE Riders on the machine are subject to injuries such as being struck by foreign objects and being thrown off the machine only machine operator is allowed on the machine Riders are not allowed riders also obstruct the ope...

Page 32: ...near electric lines NEVER MOVE any part of the machine or loads at a distance lower than 3 meters 9 84 ft plus twice the length L of line insulators perform all checks and behave in compliance with any applicable local regulation wet ground will expand the area that could cause any person on it to be affected by electric shock keep all people and or assistants away from the working area ...

Page 33: ...NALS TO WARN BYSTANDERS BEFORE START ING MACHINE TAKE ADVANTAGE OF A PERSON THAT WATCHES THE REVERSE GEAR IF VISIBILITY IS PREVENTED ALWAYS KEEP VISUAL CONTACT WITH BYSTANDERS Use manual signals according to local rules if work ing condition require a flagman No motions shall be made unless signals are clearly understood by both signalman and operator Learn the meaning of all flags signs and marki...

Page 34: ...ter Telecommunications etc Ask for information about underground utility lines MOVE AND OPERATE MACHINE SAFELY Bystanders are in danger of being run over Confirm the location of bystanders before moving slewing or operating the machine Always keep the travel alarm in good working condi tion if equipped It warns people when the ma chine starts to move Use a signal person when moving slewing or oper...

Page 35: ...connect front axle lock INVESTIGATE JOB SITE BEFORE HAND Clear all persons from area of operation and ma chine movement Make sure worksite footing has sufficient strength to firmly support the machine When working close to an excavation operate the machine with chassis frame positioned perpendicu lar to the cliff face so that the machine can more easily evacuate if the cliff face collapses Confirm...

Page 36: ... in great dan ger the incolumity of the operator and of the downhill bystanders If the engine stops suddenly apply brakes and lower immediately the bucket to the ground A Wrong B Correct DRIVE MACHINE SAFELY Before starting the machine read carefully the use and instructions manual to get familiar with pedals and levers Before moving the machine confirm which way to move travel pedals levers for t...

Page 37: ...working on frozen ground Temperature increases will cause the ground to be come soft and make ground travel unstable AVOID INJURY FROM UNEXPECTED MACHINE MOVEMENT Death or serious injury may result if you attempt to get on or off a moving machine To avoid roll aways select level ground when possible to park machine do not park the machine on a grade lower the bucket and or other work tools to the ...

Page 38: ...nt nature that could endanger the operator it is necessary to install a FOPS Falling Object Pro tective Structure to protect the cab OPERATE WITH CAUTION If the front attachment or any other part of the ma chine hits against an overhead obstacle such as a bridge both the machine and the overhead obstacle will be damaged and personal injury may results as well Take care to avoid hitting overhead ob...

Page 39: ... position run engine at slow idle speed without load for 5 minutes turn key switch to O to stop engine Remove key from switch pull the safety lever to LOCK position allow engine to cool close windows roof window and cab door lock all access doors and compartments NEVER UNDERCUT A HIGH BANK The edges could collapse or a land slide could occur causing serious injury or death ...

Page 40: ...ite Make sure that all personnel obey the signal per son s directions CONFIRM DIRECTION WHERE THE MACHINE IS TO BE DRIVEN Instinctive travel pedal operation may result in seri ous injury and even death Before driving the machine be aware of the under carriage position relative to the operator s seat If swinging steering axle is located behind towards the counterweight the machine will move reverse...

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