Hitachi LX70-7 LX80-7 Wheel Loader Technical Manual (T077E-01)
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Hitachi LX70-7 LX80-7 Wheel Loader Technical Manual (T077E-01)
- Manual Language:English
- Downloadable:Yes
- Pages: 184
- Size: 21.6 MB
- Format:PDF
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DESCRIPTION:
Hitachi LX70-7 LX80-7 Wheel Loader Technical Manual (T077E-01)
- We offer a wide variety of wheel loaders which have been enthusiastically welcomed by users all over the world.
- Models LX70-7 and LX80-7, articulated type wheel loaders, are the latest products developed from years of research and experience. To get the most of the loader, it is required that you become familiar with its features, construction, operating and maintenance procedures.
- This Service Manual explains the structure of the above loaders for service personnel and shop workers. We hope it will be your reference guide during servicing jobs.
- The descriptions and specifications described in this manual are subject to change without notice.
TABLE OF CONTENTS:
Hitachi LX70-7 LX80-7 Wheel Loader Technical Manual (T077E-01)
INDEX(LX70-7_80-7).......................................................................... 1 FOREWORD.................................................................................... 3 TABLE OF CONTENTS........................................................................... 5 0. SPECIFICATIONS........................................................................... 9 0.1 OUTER VIEWS......................................................................... 9 0.2 SPECIFICATIONS...................................................................... 12 1. ENGINE AND RELATED COMPONENTS............................................................ 15 1.1 ENGINE.............................................................................. 15 1.2 LUBRICATING SYSTEM.................................................................. 19 1.3 COOLING SYSTEM...................................................................... 20 1.4 FUEL SYSTEM......................................................................... 22 1.5 INTAKE AND EXHAUST SYSTEM........................................................... 24 1.6 ELECTRICAL SYSTEM................................................................... 26 1.7 ENGINE CONTROL UNIT................................................................. 28 2. POWER TRAIN.............................................................................. 31 2.1 HST UNIT............................................................................ 33 2.1.1 HYDRAULIC DRIVE............................................................... 33 2.1.2 HST AND HST CHARGE CIRCUIT.................................................... 36 2.1.3 HST CONTROL................................................................... 39 2.2 HST PUMP............................................................................ 41 2.2.1 GENERAL DESCRIPTION........................................................... 42 2.2.2 PUMP CONTROL.................................................................. 48 2.2.3 FNR SOLENOID VALVE............................................................ 57 2.3 HST MOTOR........................................................................... 59 2.3.1 GENERAL DESCRIPTION........................................................... 60 2.3.2 REGULA REGULATOR.............................................................. 65 2.3.3 DIRECTION CONTROL SOLENOID VALVE.............................................. 67 2.3.4 FLUSH AND BOOST VALVES........................................................ 67 2.3.5 MOTOR TIL-ROLLING SPEED CONTROL VALVE ........................................ 69 2.4 TRANSMISSION........................................................................ 70 2.4.1 CLUTCH SHAFT.................................................................. 74 2.4.2 TRANSMISSION CONTROL VALVE.................................................... 76 2.4.3 TRANSMISSION CIRCUIT.......................................................... 77 2.4.4 QUICK SHIFT SWITCH (QSS)...................................................... 81 2.5 PROPELLER SHAFT..................................................................... 83 2.6 DRIVE AXLES (FRONT AND REAR)........................................................ 85 2.6.1 AXLE.......................................................................... 85 2.6.2 DIFFERENTIAL.................................................................. 89 2.6.3 FINAL REDUCTION GEAR.......................................................... 91 2.7 WHEEL ASSEMBLY (TIRE AND WHEEL)..................................................... 93 2.7.1 TIRE.......................................................................... 93 2.7.2 WHEEL......................................................................... 93 3. BRAKE SYSTEM............................................................................. 95 3.1 SERVICE BRAKE....................................................................... 96 3.1.1 GENERAL DESCRIPTION (BRAKE LINE).............................................. 96 3.1.2 BRAKE VALVE...................................................................101 3.1.3 DISK BRAKE....................................................................105 3.1.4 BRAKE OIL TANK................................................................106 3.2 P PARKING BRAKE.....................................................................107 3.2.1 GENERAL DESCRIPTION (BRAKE LINE)..............................................108 3.2.2 PARKING BRAKE ELECTRIC CIRCUIT...............................................110 3.2.3 PARKING BRAKE SOLENOID VALVE..................................................113 3.2.4 DISK BRAKE....................................................................114 4. STEERING SYSTEM..........................................................................115 4.1 GENERAL DESCRIPTION.................................................................115 4.2 OIL CIRCULA CIRCULATION ROUTES......................................................117 4.3 STEERING WHEEL UNIT.................................................................118 4.4 STEERING VALVE (ORBITROL)...........................................................119 4.5 PRIORITY VALVE......................................................................124 4.6 STEERING CYLINDER...................................................................129 5. FRAME AND COCKPIT........................................................................131 5.1 FRAME...............................................................................131 5.2 CENTER HINGE PIN....................................................................134 6. HYDRAULIC SYSTEM.........................................................................137 6.1 OIL CIRCULATION ROUTES..............................................................137 6.2 PUMP................................................................................141 6.3 CONTROL VALVE.......................................................................145 6.3.1 GENERAL DESCRIPTION...........................................................145 6.3.2 OPERATION.....................................................................148 6.3.3 RELIEF VALVE..................................................................152 6.4 VALVE CONTROLS......................................................................155 6.5 OIL TANK............................................................................157 7. LOAD HANDLING SYSTEM.....................................................................159 7.1 BOOM, BELLCRANK, AND BUCKET.........................................................160 7.1.1 GENERAL DESCRIPTION...........................................................160 7.1.2 BUCKET........................................................................163 7.1.3 BUCKET LEVELER................................................................164 7.1.4 BOOM KICKOUT (OPTION).........................................................165 7.2 CYLINDERS...........................................................................166 7.2.1 BOOM CYLINDER.................................................................166 7.2.2 BUCKET CYLINDER...............................................................166 7.3 ANTI-PITCHING SYSTEM (APS) [OPTION].................................................171 8. ELECTRIC SYSTEM..........................................................................177 8.1 LIGHTING UNIT.......................................................................177 8.2 METERS AND SWITCHES.................................................................178 8.2.1 OPERA OPERATING TING ST STATUS TUS MONIT MONITORS ORS (CLUSTER METER UNIT)....178 8.2.2 LIGHTING SWITCH AND TURN SIGNAL SWITCH........................................180 8.3 LOCATION OF RELAYS..................................................................181 8.4 ELECTRIC CIRCUIT DIAGRAM............................................................182 SERVICE MANUAL REVISION REQUEST FORM........................................................183
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