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MH 6.6 MH 8.6 HYDRAULIC EXCAVATOR Workshop Manual Print No. 604.13.562 English III-2005 T HIS ALERT SYMBOL SIGNALS IMPORTANT MESSAGES INVOLVING YOUR SAFETY . Read and heed carefully the safety instructions listed and follow the precautions recommended to avoid potential risks and to safeguard your health and your safety. You will find this symbol in the text of this Manual referred to the following key words: WARNING - Cautions directed to avoid improper repair interventions involving potential consequences for the safety of the personnel performing the repairs.
DANGER - These warnings qualify specifically potential dangers for the safety of the operator or other persons directly or indirectly involved. IMPORTANT NOTICE All maintenance and repair interventions explained in this Manual must be performed exclusively by the Service Organisation of the Manufacturer , observing strictly the instructions explained using, whenever necessary, the recommended specific tools. Whoever performs the operations reported without following exactly the precautions is responsible on his own, for the damages that may result.
Neither the Factory nor any Organisations in its Distribution Network, including but not limited to national, regional or local distributors, are responsible for any liability arising from any damage resulting from defects caused by parts and/or components not approved by the Factory for use in maintaining and/or repairing prod- ucts manufactured or merchandised by the Factory. In any case, no warranty of any kind is made or shall be imposed with respect to products manufactured or merchandised by the Factory, when failures are caused by the use of parts and/or components not approved by the Factory.
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AVOID ACCIDENTS Most accidents, whether they occur in industry, on the farm, at home or on the road, are caused by the fail- ure of some individuals to follow simple and funda- mental safety rules and precautions. For this reason MOST ACCIDENTS CAN BE PREVENTED by recog- nising the real cause and doing something aboiut it before the accident occurs. Regardless of the care used in the design and con- struction of any type of equipment, there are many conditions that cannot be completely safeguarded against without interfering in the reasonable accessi- bility and efficient operation. A carefull operator is the best insurance against an accident.
The complete observance of one simple rule would prevent many serious accidents. The rule is simple: never attempt to clean, lubricate or maintain a machine while it is in motion. WARNING Prior to engaging in any maintenance, adjustment or repair operation on machines having hydrauli- cally, mechanically, and/or cable controlled equip- ment (such as shovels, loaders, dozers, excavators etc.) be certain the equipment is lowered to the ground. If it is necessary to have the equipment partially or fully raised to gain access to certain items, be sure the equipment is suitably supported by means other than the devices used for controlling the equipment.
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INTRODUCTION MH6.6 / MH8.6 PREFACE To the reader This Workshop Manual is written for the Repair- Technician . It provides important information on how to perform skilful repairs. We recommend to consult the Workshop Manual and also the Hydraulic Excavator Operation and Maintenance Instruction Manual before initiating any repair-work operation. Utilize the Workshop Manual as well as the Operation and Mainte- nance Instruction Manual and the Parts Cata- log as a prompt-book and adviser, even if the Hydraulic Excavator technique is become familiar. By means of the Workshop Manual the expert technician will be able to carry out a skilful repair- work operation.
- information for carrying out the performance tests on the machine; - troubleshooting, information concerning the rec- ognition and correction of failures on the ma- chine, - technical information necessary for carrying out the Service and Repair operations on the Ma- chine, the equipment necessary for the mainte- nance operations, the information concerning the Standards to be applied in the Maintenance operations, the Procedures for the Removal and Installation operations as well as for Disas- sembly and Assembly operations. By means of the index contents a desired informa- tion can be easily achieved. For a better understanding the illustration of the part will be displayed.
Therefore differences in arrangement of the Hy- draulic Excavator are possible, whenever the lat- ter involves the univocal capability of the informa- tion. Use The Workshop Manual refers to the initial Machine configuration. Structural changes or rebuilding operations are not described in this Handbook. In this Workshop Manual the following information can be found: - Safety Instructions; - Technical Data and Special Tools; - Functional Description; - Performance Testing; - Troubleshooting and Failure Correction; - Repair Instructions.
In the Section Safety Instructions the recom- mended procedures are described, so that through the relevant compliance with, a risk of accident for the User and for the personnel re- sponsible of the maintenance operations on the machine can be avoided. In the Section Technical Data the Service Data, the change tables and lists of the needed Special Tools and Maintenance materials are indicated. In other Sections, for each mechanical group, when available can be found: - a functional description with information con- cerning the operation of the essential devices and equipments; Repair operations Carry out the necessary repair works as soon as possible.
This procedure will avoid the mainte- nance costs while increasing the availability of your Hydraulic Excavator. Pay always attention during all works to the Work- shop Manual warnings and cautions and to the Operation and Maintenance Instruction Manual. The Service Assistance will gladly carry out for you the works not described in the Workshop Manual. Always utilize the Original Spare Parts only. Further information material Please notice the supplementary information con- sulting the following Handbooks: - Operation and Maintenance Instruction Manual ; - Parts Catalog . Carefully read personal and machine SAFETY INSTRUCTIONS (at the beginning of this manual
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MH6.6 / MH8.6 INTRODUCTION Warnings and symbols Risks resulting from failure to observe the safety instructions The following signs are used in the Workshop Manual to designate exceptionally important in- formation: Precautionary rules and measures designed to protect the operator and other persons from life- threatening hazards or injury and to prevent extensive damage to prop- erty. This hydraulic excavator has been built in accordance with state-of- the-art standards and recognized safety regulations. Nevertheless, its use may constitute a risk if it continues to be operated despite damage being suspected or having occurred, or if it is inexpertly repaired.
Information and precautionary measures designed to prevent dam- age to the machine and other prop- erty. There is then a risk of - life-threatening injury - irreparable damage to the machine and other assets. The hydraulic excavator must be stopped immediately if suspected damage or damage that has oc- curred affects the safety of the op- erator, other persons at the excava- tor deployment site, or other assets. All components are carefully coor- dinated. Trouble-free operation and a long service life are assured only if original spare parts are used. Carefully read personal and machine SAFETY INSTRUCTIONS (at the beginning of this manual)
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