Hitachi ZX 870-5G Workshop Manual Download Page 11 | Manualshive

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Group 1 Precautions for Disassembling and Assembling

SECTION 1 GENERAL

W1-1-1-6

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Summary of Contents for ZX 870-5G

Page 1: ...RL http www hitachi c m com Service Manual consists of the following separate Part No Technical Manual Operational Principle Vol No TOJBE EN Technical Manual Troubleshooting Vol No TTJBE EN Workshop Manual Vol No WJBE EN WJBE EN 00 PART NO Hydraulic Excavator Workshop Manual 870 5G 870LC 5G 870H 5G 870LCH 5G 870LCR 5G ZX ...

Page 2: ...eparation SECTION 2 MAINTENANCE STANDARD Group 1 Upperstructure Group 2 Undercarriage Group 3 Front Attachment SECTION 3 UPPERSTRUCTURE Group 1 Cab Group 2 Counterweight Group 3 Main Frame Group 4 Engine Group 5 Radiator Assembly Group 6 Hydraulic Oil Tank Group 7 Fuel Tank Group 8 Pump Device Group 9 Control Valve Group 10 Swing Device Group 11 Pilot Valve Group 12 Solenoid Valve Group 13 Signal ...

Page 3: ... 5 Travel Device Group 6 Signal Control Valve Group 7 Others Upperstructure Group 8 Others Undercarriage TECHNICAL MANUAL Operational Principle TECHNICAL MANUAL Troubleshooting SECTION 4 OPERATIONAL PERFORMANCE TEST Group 1 Introduction Group 2 Standard Group 3 Engine Test Group 4 Excavator Test Group 5 Component Test Group 6 Adjustment SECTION 5 TROUBLESHOOTING Group 1 Diagnosing Procedure Group ...

Page 4: ...ification W1 3 1 1 Final painted color W1 3 1 1 Group 4 Bleeding Air Bleeding Air from Hydraulic Oil Tank W1 4 1 1 Bleeding Air from Hydraulic System W1 4 1 2 Bleeding Air from Fuel System W1 4 1 3 Bleeding Air from Radiator W1 4 1 4 Group 5 Pressure Release Procedure Hydraulic Circuit Pressure Release Procedure W1 5 1 1 Group 6 Preparation Preparation before Inspection and Maintenance W1 6 1 1 SE...

Page 5: ...JBEW 1 2 Blank ...

Page 6: ...ainers for draining fluids Use matching marks for easier reassembling if necessary Be sure to use the specified special tools when instructed If a part or component cannot be removed after removing its securing nuts and bolts do not attempt to remove it forcibly Find the cause s then take the appropriate measures to remove it Orderly arrange disassembled parts Mark and tag them if necessary Store ...

Page 7: ...an the floating seal and seal mounting bores with cleaning solvent Use a wire brush to remove mud rust or dirt from seal mounting bores After cleaning thoroughly dry parts with compressed air Clean seal ring 1 and O ring 2 mounting bores Check the bore surface for scuffing or scoring by touching the surface with finger After installing the floating seal check that O ring 2 is not twisted and that ...

Page 8: ...eep the lifted load balanced When lifting a load using an eyehole be sure to eliminate any gaps between the sling and load Refer to the right illustration Reduce the load weight so that it is less than 80 of the sling breaking force Avoid using twisted bound connected or hitched slings Do not place any object on twisted or bent slings Refer to the right illustration When removing the slings from u...

Page 9: ...sling for any damage corresponding to examples shown to the right If any damage is found cut and discard the sling Even if no damage is found do not use slings older than 7 years Damaged Appearance a a a e f b b c c g d a Broken Sewing Thread a Broken Sewing Thread e Separation of Belt b Scuffing f Scoring b Scuffing c Fuzz d Broken Sewing Thread c Fuzz g Broken Warp a Broken Sewing Thread W162 01...

Page 10: ...ation Allowable errors will be indicated if necessary Allowable Limit 1 Normal machine performance cannot be accomplished after exceeding this limit 2 Repair or adjustment is difficult after exceeding this limit 3 Repair or adjustment is impossible after exceeding this limit Therefore in consideration of operation efficiency and maintenance expense proper maintenance shall be carried out before re...

Page 11: ...Group 1 Precautions for Disassembling and Assembling SECTION 1 GENERAL W1 1 1 6 Blank ...

Page 12: ...ghten the correct bolts correctly when assembling the machine or components Specified Tightening Torque Chart Bolt Dia Wrench Size Hexagon Wrench Size Socket Bolt N m kgf m lbf ft N m kgf m lbf ft N m kgf m lbf ft M6 10 5 3 to 4 0 3 to 0 4 2 2 to 3 M8 13 6 30 3 22 20 2 15 10 1 7 4 M10 17 8 65 6 5 48 50 5 37 20 2 15 M12 19 10 110 11 81 90 9 66 35 3 5 26 M14 22 12 180 18 133 140 14 103 55 5 5 41 M16...

Page 13: ...ttom of bolt hole Also the bolts that are too short cannot develop sufficient tightening force The torque given in the chart on the previous page are for general use only however a different torque is given for a specific application Use the specified torque Clean the nut and bolt threads and remove dirt or corrosion before installing Tightening Order When tightening two or more bolts tighten them...

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