Complete workshop repair service manual with electrical wiring diagrams for Hitachi ZX300LC-6, ZX300LCN-6 Excavator. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

Hitachi ZX300LC-6, ZX300LCN-6 Excavator service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

MANUAL LIST:
TODDN50-EN-00 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Technical Manual (Operational Principle).pdf
TTDDN50-EN-00 (attach to ) - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Electrical Circuit Diagram.pdf
TTDDN50-EN-00 (attach to ) - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Electrical Circuit Diagram (Optional).pdf
TTDDN50-EN-00 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Technical Manual (Troubleshooting).pdf
WDDN50-EN-00 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Workshop Manual.pdf
WDDN50-EN-01 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Workshop Manual.pdf

FORMAT: PDF
LANGUAGE: ENGLISH
PAGES: 2,299
...

TODDN50-EN-00 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Technical Manual (Operational Principle)...2
  TODDN50-EN-00...2
  CONTENTS...4
  INTRODUCTION...10
  SYMBOL AND ABBREVIATION...12
  SECTION AND GROUP CONTENTS...14
  SECTION 1 GENERAL...16
    Group 1 Specifications...18
      Specifications...18
      Working Ranges...19
    Group 2 Component Layout...20
      Main Component...20
      Electrical System (Overview)...22
      Electrical System (Rear Tray)...23
      Electrical System (Switch Panel)...24
      Electrical System (Utility Space)...25
      Electrical System (Relays)...26
      Engine...27
      Aftertreatment Device...28
      Pump Device...29
      Around Pump Device...30
      Control Valve...31
      Signal Control Valve...31
      Swing Device...33
      Travel Device...33
      5-Spool Solenoid Valve Unit...34
      2-Spool Solenoid Valve Unit (AftertreatmentDevice Regeneration Control)...34
      DEF Tank...35
      DEF Supply Module...35
      Layout of Attachment Spec. Parts...37
    Group 3 Component Specifications...42
      Engine...42
      Engine Accessories...46
      Hydraulic Component...47
      Electrical Component...51
  SECTION 2 SYSTEM...54
    Group 1 Controller...56
      Outline...56
      CAN Circuit...57
    Group 2 Control System...60
      Outline...60
      Engine Control...63
      Pump Control...95
      Valve Control (Standard)...119
      Valve Control (Optional)...137
      Other Control...147
    Group 3 Engine System...158
      ECM System...158
      Fuel Injection Control...159
      Fuel Injection Amount Correction Control...167
      EGR Control...169
      Preheating Control...171
      Variable Turbocharger Control...172
      Alarm Control...173
      Urea SCR System...174
      Engine Output Restriction Control (INDUCEMENT)...185
      Aftertreatment Device...189
      Aftertreatment Device Regeneration Control...191
    Group 4 Hydraulic System...194
      Outline...194
      Pilot Circuit...195
      Main Circuit...207
      Breaker/Pulverizer/Crusher Circuit (Optional)...229
    Group 5 Electrical System...240
      Outline...240
      Main Circuit...241
      Electric Power Circuit (Key Switch: OFF)...243
      CAN Circuit...245
      Accessory Circuit (Key Switch: ACC)...247
      Starting Circuit (Key Switch: START)...249
      Charging Circuit (Key Switch: ON)...251
      Surge Voltage Prevention Circuit...255
      Pilot Shut-Off Circuit (Key Switch: ON)...257
      Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature...259
      Engine Stop Circuit...261
      Monitor Circuit...264
      Security Circuit...265
      Radio Circuit...267
      Air Conditioner Circuit...267
      Accessory Circuit...270
      Work Light Circuit...271
      Wiper/Washer Circuit...273
      Wiper Circuit...273
      Cab Light Circuit...275
  SECTION 3 COMPONENT OPERATION...280
    Group 1 Pump Device...282
      Outline...282
      Main Pump...283
      Regulator...287
      Solenoid Valve...311
      Pilot Pump...313
      Pump Delivery Pressure Sensor...313
      Pump Control Pressure Sensor...313
    Group 2 Swing Device...314
      Outline...314
      Swing Reduction Gear...315
      Swing Motor...316
      Swing Parking Brake...317
      Valve Unit...319
    Group 3 Control Valve...332
      Outline...332
      Hydraulic Circuit...355
      Flow Combiner Valve...361
      Main Relief Valve...363
      Overload Relief Valve (with Make-Up Function)...367
      Regenerative Valve...371
      Anti-Drift Valve...381
      Flow Rate Control Valve...385
      Digging Regenerative Valve...389
      Boom Lower Meter-In Cut Valve...391
      Auxiliary Flow Combiner Valve and Bypass Shut-Out Valve...393
    Group 4 Pilot Valve...398
      Outline...398
      Operation (Front Attachment/Swing and Travel Pilot Valves)...400
      Operation (Auxiliary, Positioning Pilot Valves)...408
      Shockless Function (Only for Travel Pilot Valve)...413
    Group 5 Travel Device...414
      Outline...414
      Travel Reduction Gear...415
      Travel Motor...417
      Parking Brake...419
      Travel Brake Valve...421
      Overload Relief Valve...425
      Travel Mode Control...427
    Group 6 Signal Control Valve...432
      Outline...432
      Pilot Port...433
      Shuttle Valve...438
      Shockless Valve...441
      Pump 1 Flow Rate Control Valve, Pump 2 Flow Rate Control Valve, Pump 3 Flow Rate Control Valve...445
      Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool...447
    Group 7 Others (Upperstructure)...448
      Pilot Shut-Off Solenoid Valve...448
      Solenoid Valve...450
      Hose Rupture Valve...455
      Pilot Relief Valve...461
      Recirculation Valve ...462
    Group 8 Others (Undercarriage)...464
      Swing Bearing...464
      Centerjoint...465
      Track Adjuster (Front Idler Integrated Type)...466
  SERVICE MANUAL REVISION REQUEST FORM...470
TTDDN50-EN-00 (attach to ) - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Electrical Circuit Diagram (Optional)...472
  ELECTRICAL CIRCUIT DIAGRAM (OPTIONAL) ...472
  ATTACHMENT HARNESS...473
  AUXILIARY FLOW COMBINER HARNESS...474
  AIR SUSPENSION, HEATER SEAT HARNESS...475
  OVERLOAD ALARM HARNESS...476
  OVERLOAD ALARM SUB HARNESS...477
  BOOM BOTTOM PRESSURE SENSOR HARNESS...478
  ELECTRICAL CIRCUIT DIAGRAM (QUICK HITCH)...479
  QUICK HITCH HARNESS...480
  QUICK HITCH SWITCH HARNESS...481
TTDDN50-EN-00 (attach to ) - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Electrical Circuit Diagram...482
  ELECTRICAL CIRCUIT DIAGRAM...482
  CONNECTORS...483
  CAB HARNESS...484
  ENGINE HARNESS...485
  PUMP HARNESS...486
  NOx HARNESS...487
  MONITOR HARNESS...488
  GSM (MOBILE COMMUNICATION TERMINAL) HARNESS...489
  SATELLITE COMMUNICATION HARNESS...490
  KEY SWITCH HARNESS...491
  PILOT SHUT-OFF SOLENOID VALVE HARNESS...492
  REARVIEW CAMERA HARNESS...493
  HYDRAULIC CIRCUIT DIAGRAM (MONOBLOCK BOOM) (STANDARD)...494
  HYDRAULIC CIRCUIT DIAGRAM (2-PIECE BOOM) (OPTIONAL)...495
  HYDRAULIC CIRCUIT DIAGRAM (AFL)...496
TTDDN50-EN-00 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Technical Manual (Troubleshooting)...497
  TTDDN50-EN-00...497
  CONTENTS...499
  INTRODUCTION...503
  SYMBOL AND ABBREVIATION...505
  SAFETY...507
  SECTION AND GROUP CONTENTS...549
  SECTION 4...551
    Group 1 Introduction...553
      Operational Performance Tests...553
      Preparation for Performance Tests...554
    Group 2 Standard...555
      Operational Performance Standard Table...555
      Main Pump P-Q Diagram (P1, P2)...565
      Main Pump P-Q Diagram (P3)...566
      Sensor Activating Range...568
      MPDr. Monitor Indicating Values...570
    Group 3 Engine Test...583
      Engine Speed...583
      Lubricant Consumption...586
    Group 4 Machine Performance Test...587
      Travel Speed...587
      Track Revolution Speed...588
      Mistrack Check...589
      Travel Parking Leakage...590
      Swing Speed...591
      Swing Function Drift Check...592
      Swing Motor Leakage...594
      Maximum Swingable Slant Angle...596
      Swing Bearing Play...598
      Hydraulic Cylinder Cycle Time...600
      Dig Function Drift Check...602
      Control Lever Operating Force...605
      Control Lever Stroke...606
      Combined Operation of Boom Raise and Swing Function Check...607
      Combined Operation of Boom Raise and Arm Roll-In Function Check...608
      Clearance of Front Attachment Connecting Part...609
    Group 5 Component Test...611
      Primary Pilot Pressure...611
      Secondary Pilot Pressure...613
      5-Spool Solenoid Valve Set Pressure...614
      2-Spool Solenoid Valve (Aftertreatment Device Regeneration Control) Set Pressure...615
      Main Pump Delivery Pressure...617
      Main Relief Set Pressure...618
      Relief pressure (when relieving swing)...622
      Overload Relief Valve Set Pressure...624
      Main Pump Flow Rate Measurement...626
      Swing Motor Drainage...636
      Travel Motor Drainage...638
    Group 6 Adjustment...641
      Rewrite of Aftertreatment Device Serial No...641
      How to Clear Fault Code...642
      Procedure after Replacing DCU and ECM...643
      Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping...644
      How to Check Manual Regeneration Switch...645
      Remedy at DEF Pressure Decrease...646
      Remedy at DEF Abnormal Quality...648
      Clean DEF Tank...650
      Remedy when Mixing Oil in DEF Tank...651
  SECTION 5...655
    Group 1 Diagnosing Procedure...657
      Introduction...657
      Diagnosis Procedure...658
      Electrical System Inspection...661
      Precautions for Inspection and Maintenance...662
      Instructions for Disconnecting Connectors...664
      Fuse Inspection...666
      Fusible Link Inspection...669
      Battery Voltage Check...670
      Alternator Check...671
      Continuity Check...672
      Voltage and Current Measurement...674
      Check by False Signal...681
      Test Wire Harness...682
    Group 2 Monitor...685
      Outline...685
      Operating Procedures of Service Menu...686
      Setting Menu...727
      Inspection of Engine Oil Level, Coolant Level, Hour Meter, and Fuel Gauge...732
      Fuel Gauge, Coolant Temperature Gauge, DEF/AdBlue Gauge...733
    Group 3 e-Service...735
      Outline...735
      List of Operation Data...736
      Communication System...738
    Group 4 Component Layout...739
      Main Component...739
      Electrical System (Overview)...741
      Electrical System (Rear Tray)...742
      Electrical System (Switch Panel)...743
      Electrical System (Utility Space)...744
      Electrical System (Relays)...745
      Engine...746
      Aftertreatment Device...747
      Pump Device...748
      Around Pump Device...749
      Control Valve...750
      Signal Control Valve...750
      Swing Device...752
      Travel Device...752
      5-Spool Solenoid Valve Unit...753
      2-Spool Solenoid Valve Unit (Aftertreatment Device Regeneration Control)...753
      DEF Tank...754
      DEF Supply Module...754
      Layout of Attachment Spec. Parts...756
      Pilot Port...784
      Port Layout of Control Valve (Main Circuit)...788
      Port Layout of Control Valve (Pilot Circuit)...790
    Group 5 Troubleshooting A...793
      Troubleshooting A (Base Machine Diagnosis By Using Fault Codes) Procedure...793
      MC Fault Code List...795
      ECM Fault Code List...816
      DCU Fault Code List...830
      Monitor Controller (Monitor) Fault Code List...837
      Monitor Controller (Information) Fault Code List...838
      Air Conditioner Controller Fault Code List...841
      Communication Terminal Fault Code List...842
      MC Fault Codes 11000 to 11002...843
      MC Fault Code 11003...844
      MC Fault Codes 11006, 11007,11009...847
      CAN0 Harness Check...848
      ISO-CAN (Engine) Harness Check...852
      MC Fault Codes 11008, 11010...855
      CAN1 Harness Check...856
      MC Fault Code 11100...859
      MC Fault Code 11101...860
      MC Fault Codes 11200 to 11202...861
      MC Fault Code 11203...862
      MC Fault Codes 11206 to 11208...863
      MC Fault Codes 11301 to 11303...864
      MC Fault Codes 11304, 11307, 11325...865
      MC Fault Codes 11995, 11997...866
      MC Fault Code 11400...867
      MC Fault Code 11401...868
      MC Fault Code 11402...869
      MC Fault Code 11403...870
      MC Fault Code 11406...871
      MC Fault Code 11407...872
      MC Fault Code 11408...873
      MC Fault Code 11409...874
      MC Fault Code 11410...875
      MC Fault Code 11411...876
      MC Fault Codes 11434, 11435...877
      MC Fault Code 11436...878
      MC Fault Codes 11458, 11459...879
      MC Fault Code 11427...880
      MC Fault Code 11428...881
      MC Fault Code 11901...882
      MC Fault Codes 20010 to 20012...883
      Monitor Controller (Information) Fault Codes 13304, 13310...884
      Monitor Controller (Information) Fault Code 13311...885
      Monitor Controller (Information) Fault Codes 20100 to 20114...886
      Monitor Controller (Information) Fault Codes 20109 to 20149...887
      Air Conditioner Controller Fault Codes 11 to 22...888
      Air Conditioner Controller Fault Codes 43 to 92...889
    Group 6 Troubleshooting B...891
      Troubleshooting B (Machine Diagnosis by Using Trouble Symptom) Procedure...891
      Relationship between Machine Trouble Symptoms and Related Parts...893
      Correlation between Trouble Symptoms and Part Failures...920
      Engine System Troubleshooting...940
      All Actuator System Troubleshooting...950
      Front Attachment System Troubleshooting...958
      Swing System Troubleshooting...974
      Travel System Troubleshooting...976
      Other System Troubleshooting...982
      Exchange Inspection...987
      How to Lowering Boom When Emergency and When Engine Stops without Hose Rupture Valve...990
      How to Lowering Boom When Emergency and When Engine Stops with Hose Rupture Valve...991
      Attachment Circuit Pressure Release Procedure...992
    Group 7 Air Conditioner...993
      Outline...993
      Functions of Main Parts...996
      Troubleshooting...1001
      Air Conditioner Controller Fault Code List...1002
      Air Conditioner Controller Fault Codes 11 to 22...1003
      Air Conditioner Controller Fault Codes 43 to 92...1004
      Work after Replacing Components...1026
      Refill Compressor Oil...1027
      Charge Air Conditioner with Refrigerant...1028
      Hose and Pipe Tightening Torque...1036
  SERVICE MANUAL REVISION REQUEST FORM...1039
  The Attached Diagram List...1040
WDDN50-EN-00 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Workshop Manual...1041
  WDDN50-EN-00...1041
    CONTENTS...1043
      SECTION 1GENERAL...1043
      SECTION 2MAINTENANCE STANDARD...1045
      SECTION 3UPPERSTRUCTURE...1047
      SECTION 4UNDERCARRIAGE...1049
      SECTION 5 FRONTATTACHMENT...1051
    INTRODUCTION...1053
      To The Reader...1053
      Additional References...1053
      Manual Composition...1053
      Page Number...1053
      Trademark...1053
      Safety Alert Symbol and Headline Notations...1054
      Units Used...1054
    SYMBOL AND ABBREVIATION...1055
    SAFETY...1057
      Recognize Safety Information...1057
      Understand Signal Words...1057
      Follow Safety Instructions...1058
      Prepare for Emergencies...1059
      Wear Protective Clothing...1059
      Protect Against Noise...1060
      Inspect Machine...1060
      General Precautions for the Cab...1061
      Use Handholds and Steps...1062
      Adjust the Operator's Seat...1062
      Ensure Safety Before Rising from or Leaving Operator’s Seat...1063
      Fasten Your Seat Belt...1063
      Move and Operate Machine Safely...1064
      Operate Only from Operator's Seat...1064
      Jump Starting...1065
      Keep Riders off Machine...1065
      Precautions for Operations...1066
      Investigate Job Site Beforehand...1067
      Install OPG Guard...1068
      Restriction of Attachment Installation...1068
      Provide Signals for Jobs Involving Multiple Machines...1069
      Confirm Direction of Machine to Be Driven...1069
      Drive Machine Safely...1070
      Avoid Injury from Rollaway Accidents...1072
      Avoid Injury from Back-Over and Swing Accidents...1073
      Keep People Clear from Working Area...1074
      Never Position the Bucket Over Anyone...1074
      Avoid Undercutting...1075
      Avoid Tipping...1075
      Never Undercut a High Bank...1076
      Dig with Caution...1076
      Operate with Caution...1076
      Avoid Power Lines...1077
      Precautions for Lightning...1077
      Object Handling...1078
      Protect Against Flying Debris...1078
      Park Machine Safely...1079
      Handle Fluids Safely−Avoid Fires...1079
      Transport Safely...1080
      Practice Safe Maintenance...1081
      Warn Others of Service Work...1082
      Support Machine Properly...1082
      Stay Clear of Moving Parts...1083
      Prevent Parts from Flying...1083
      Avoid Injury from Attachment Falling Accident...1084
      Prevent Burns...1084
      Replace Rubber Hoses Periodically...1085
      Avoid High-Pressure Fluids...1085
      Prevent Fires...1086
      Evacuating in Case of Fire...1088
      Beware of Exhaust Fumes...1088
      Precautions for Welding and Grinding...1089
      Avoid Heating Near Pressurized Fluid Lines...1090
      Avoid Applying Heat to Lines Containing Flammable Fluids...1090
      Precautions for Handling Accumulator and Gas Damper...1090
      Remove Paint Before Welding or Heating...1091
      Beware of Asbestos and Silica Dust and Other Contamination...1091
      Prevent Battery Explosions...1092
      Service Air Conditioning System Safely...1092
      Handle Chemical Products Safely...1093
      Dispose of Waste Properly...1093
      Never Ride Attachment...1094
      Notes on Aftertreatment Device...1094
      Precautions for Communication Terminal...1094
      Precautions for Communication Terminal Equipment...1095
      Notes on Protection of Operator’s Station whenthe Machine Rolls Over...1097
      Before Returning the Machine to the Customer...1098
    SECTION AND GROUP CONTENTS...1099
    SECTION 1GENERAL...1103
      Group 1 Precautions for Disassembling and Assembling...1105
        Precautions for Disassembling and Assembling...1105
      Group 2 Tightening...1111
        Tightening Bolts and Nuts...1111
        Piping Joint...1114
      Group 3 Painting...1121
        Painting...1121
      Group 4 Bleeding Air...1123
        Bleeding Air from Hydraulic System...1123
        Bleeding Air from Fuel System...1124
        Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping...1126
      Group 5 Preparation...1127
        Preparation before Inspection and Maintenance...1127
        Hydraulic Circuit Pressure Release Procedure...1129
        Pressure Release from Hydraulic Oil Tank...1130
        Pressure Release from Expansion Tank...1131
    SECTION 2 MAINTENANCE STANDARD...1135
      Group 1 Upperstructure...1137
        Pump Device...1137
        Swing Motor...1141
      Group 2 Undercarriage...1145
        Travel Motor...1145
        Sprocket...1147
        Front Idler...1149
        Upper Roller...1151
        Lower Roller...1152
        Track...1153
      Group 3 Front Attachment...1157
        Pin and Bushing...1157
        Side Cutter (2021232, 2021233)...1159
        Point (4512365)...1160
        Standard Dimensions for Arm and Bucket Connection...1161
        Standard Dimensions for Arm and Boom Connection...1162
        Cylinder...1163
    SECTION 3 UPPERSTRUCTURE...1167
      Group 1 Cab...1169
        Removal and Installation of Cab...1169
      Group 2 Counterweight...1195
      Group 3 Main Frame...1197
        Removal and Installation of Main Frame...1197
      Group 4 Engine...1205
        Removal and Installation of Engine...1205
      Group 8 Pump Device...1239
        Removal and Installation of Pump Device...1239
        Removal and Installation of Coupling...1251
        Disassembly of Pump Device...1253
        Assembly of Pump Device...1261
        Disassembly of Regulator...1273
        Assembly of Regulator...1275
        Disassembly of Solenoid Valve Unit...1277
        Assembly of Solenoid Valve Unit...1279
        Structure of Pilot Pump...1281
      Group 9 Control Valve...1283
        Removal and Installation of Control Valve...1283
      Group 10 Swing Device...1307
        Removal and Installation of Swing Device...1307
        Disassembly of Swing Reduction Gear...1311
        Assembly of Swing Reduction Gear...1316
        Disassembly of Swing Motor...1323
        Assembly of Swing Motor...1326
      Group 11 Pilot Valve...1329
        Removal and Installation of Pilot Valve (Left)...1329
        Removal and Installation of Pilot Valve (Right)...1341
        Removal and Installation of Travel Pilot Valve...1357
        Disassembly of Pilot Valves (Right and Left)...1361
        Assembly of Pilot Valves (Right and Left)...1364
        Disassembly of Travel Pilot Valve...1367
        Assembly of Travel Pilot Valve...1371
      Group 12 Solenoid Valve...1377
        Removal and Installation of Pilot Shut-Off Solenoid Valve...1377
        Removal and Installation of 5-Spool Solenoid Valve Unit...1381
        Removal and Installation of 2-Spool Solenoid Valve Unit...1385
        Disassembly of Pilot Shut-Off Solenoid Valve...1389
        Assembly of Pilot Shut-Off Solenoid Valve...1391
        Structure of 5-Spool Solenoid Valve Unit...1393
        Structure of 2-Spool Solenoid Valve Unit...1395
      Group 13 Signal Control Valve...1397
        Removal and Installation of Signal Control Valve...1397
        Structure of Signal Control Valve...1401
      Group 14 Aftertreatment Device...1405
        Removal and Installation of Aftertreatment Device...1405
      Group 15 DEF Tank...1429
        Removal and Installation of DEF Tank...1429
      Group 16 Coolant Control Valve...1443
        Removal and Installation of Coolant Control Valve...1443
      Group 17 DEF Supply Module...1445
        Removal and Installation of DEF Supply Module...1445
    SECTION 4 UNDERCARRIAGE...1453
      Group 1 Swing Bearing...1455
        Removal and Installation of Swing Bearing...1455
        Disassembly of Swing Bearing...1461
        Assembly of Swing Bearing...1464
      Group 2 Travel Device...1467
        Removal and Installation of Travel Device...1467
        Disassembly of Travel Device...1471
        Assembly of Travel Device...1475
        Disassembly of Travel Motor...1483
        Assembly of Travel Motor...1486
        Disassembly of Brake Valve...1491
        Assembly of Brake Valve...1493
        Precautions for Using Floating Seal...1495
      Group 3 Center Joint...1497
        Removal and Installation of Center Joint...1497
        Disassembly of Center Joint...1501
        Assembly of Center Joint...1503
        Replacement of Body and Spindle...1506
      Group 4 Track Adjuster...1507
        Removal and Installation of Track Adjuster...1507
        Disassembly of Front Idler...1511
        Assembly of Front Idler...1514
        Disassembly of Track Adjuster...1517
        Assembly of Track Adjuster...1521
        Precautions for Using Floating Seal...1525
      Group 6 Upper and Lower Rollers...1527
        Removal and Installation of Upper Roller...1527
        Removal and Installation of Lower Roller...1533
        Disassembly of Lower Roller...1539
        Assembly of Lower Roller...1541
        Precautions for Using Floating Seal...1543
      Group 7 Track...1545
        Removal and Installation of Track...1545
    SECTION 5 FRONTATTACHMENT...1555
      Group 1 Front Attachment...1557
        Removal and Installation of Front Attachment...1557
      Group 2 Cylinder...1567
        Removal and Installation of Boom Cylinder...1567
        Removal and Installation of Arm Cylinder...1575
        Removal and Installation of Bucket Cylinder...1583
        Removal and Installation of Positioning Cylinder...1587
        Disassembly of Boom, Arm, and Bucket Cylinders...1593
        Assembly of Boom, Arm, and Bucket Cylinders...1600
        Disassembly of Positioning Cylinder...1609
        Assembly of Positioning Cylinder...1612
      Group 3 Hose Rupture Valve...1615
        Removal and Installation of Hose Rupture Valve for Boom Cylinder...1615
        Removal and Installation of Hose Rupture Valve for Arm Cylinder...1619
        Removal and Installation of Hose Rupture Valve for Positioning Cylinder...1623
        Structure of Hose Rupture Valve for Boom Cylinder (Right)...1627
        Structure of Hose Rupture Valve for Boom Cylinder (Left)...1629
        Structure of Hose Rupture Valve for Arm Cylinder...1631
        Structure of Hose Rupture Valve for Positioning Cylinder...1633
    SERVICE MANUAL REVISION REQUEST FORM...1637
WDDN50-EN-01 - Hitachi ZX300LC-6, ZX300LCN-6 Hydraulic Excavator Workshop Manual...1638
  WDDN50-EN-01...1638
    CONTENTS...1640
      SECTION 1 GENERAL...1640
      SECTION 2 MAINTENANCE STANDARD...1642
      SECTION 3 UPPERSTRUCTURE...1644
      SECTION 4 UNDERCARRIAGE...1646
      SECTION 5  FRONTATTACHMENT...1648
    INTRODUCTION...1650
      To The Reader...1650
      Additional References...1650
      Manual Composition...1650
      Page Number...1650
      Trademark...1650
      Safety Alert Symbol and Headline Notations...1651
      Units Used...1651
    SYMBOL AND ABBREVIATION...1652
    SAFETY...1654
      Recognize Safety Information...1654
      Understand Signal Words...1654
      Follow Safety Instructions...1655
      Prepare for Emergencies...1656
      Wear Protective Clothing...1656
      Protect Against Noise...1657
      Inspect Machine...1657
      General Precautions for the Cab...1658
      Use Handholds and Steps...1659
      Adjust the Operator's Seat...1659
      Ensure Safety Before Rising from or Leaving Operator’s Seat...1660
      Fasten Your Seat Belt...1660
      Move and Operate Machine Safely...1661
      Operate Only from Operator's Seat...1661
      Jump Starting...1662
      Keep Riders off Machine...1662
      Precautions for Operations...1663
      Investigate Job Site Beforehand...1664
      Install OPG Guard...1665
      Restriction of Attachment Installation...1665
      Provide Signals for Jobs Involving Multiple Machines...1666
      Confirm Direction of Machine to Be Driven...1666
      Drive Machine Safely...1667
      Avoid Injury from Rollaway Accidents...1669
      Avoid Injury from Back-Over and Swing Accidents...1670
      Keep People Clear from Working Area...1671
      Never Position the Bucket Over Anyone...1671
      Avoid Undercutting...1672
      Avoid Tipping...1672
      Never Undercut a High Bank...1673
      Dig with Caution...1673
      Operate with Caution...1673
      Avoid Power Lines...1674
      Precautions for Lightning...1674
      Object Handling...1675
      Protect Against Flying Debris...1675
      Park Machine Safely...1676
      Handle Fluids Safely−Avoid Fires...1676
      Transport Safely...1677
      Practice Safe Maintenance...1678
      Warn Others of Service Work...1679
      Support Machine Properly...1679
      Stay Clear of Moving Parts...1680
      Prevent Parts from Flying...1680
      Avoid Injury from Attachment Falling Accident...1681
      Prevent Burns...1681
      Replace Rubber Hoses Periodically...1682
      Avoid High-Pressure Fluids...1682
      Prevent Fires...1683
      Evacuating in Case of Fire...1685
      Beware of Exhaust Fumes...1685
      Precautions for Welding and Grinding...1686
      Avoid Heating Near Pressurized Fluid Lines...1687
      Avoid Applying Heat to Lines Containing Flammable Fluids...1687
      Precautions for Handling Accumulator and Gas Damper...1687
      Remove Paint Before Welding or Heating...1688
      Beware of Asbestos and Silica Dust and Other Contamination...1688
      Prevent Battery Explosions...1689
      Service Air Conditioning System Safely...1689
      Handle Chemical Products Safely...1690
      Dispose of Waste Properly...1690
      Never Ride Attachment...1691
      Notes on Aftertreatment Device...1691
      Precautions for Communication Terminal...1691
      Precautions for Communication Terminal Equipment...1692
      Notes on Protection of Operator’s Station when the Machine Rolls Over...1694
      Before Returning the Machine to the Customer...1695
    SECTION AND GROUP CONTENTS...1696
    SECTION 1 GENERAL...1700
      Group 1 Precautions for Disassembling and Assembling...1702
        Precautions for Disassembling and Assembling...1702
      Group 2 Tightening...1708
        Tightening Bolts and Nuts...1708
        Piping Joint...1711
      Group 3 Painting...1718
        Painting...1718
      Group 4 ...1720
        Bleeding Air from Hydraulic System...1720
        Bleeding Air from Fuel System...1721
        Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping...1723
      Group 5 Preparation...1724
        Preparation before Inspection and Maintenance...1724
        Hydraulic Circuit Pressure Release Procedure...1726
        Pressure Release from Hydraulic Oil Tank...1727
        Pressure Release from Expansion Tank...1728
    SECTION 2 MAINTENANCE STANDARD...1732
      Group 1 Upperstructure...1734
        Pump Device...1734
        Swing Motor...1738
      Group 2 Undercarriage...1742
        Travel Motor...1742
        Sprocket...1744
        Front Idler...1746
        Upper Roller...1748
        Lower Roller...1749
        Track...1750
      Group 3 Front Attachment...1754
        Pin and Bushing...1754
        Side Cutter (2021232, 2021233)...1756
        Point (4512365)...1757
        Standard Dimensions for Arm and Bucket Connection...1758
        Standard Dimensions for Arm and Boom Connection...1759
        Cylinder...1760
    SECTION 3 UPPERSTRUCTURE...1764
      Group 1 Cab...1766
        Removal and Installation of Cab...1766
        Dimensions of Cab Glass...1792
      Group 2 Counterweight...1812
      Group 3 Main Frame...1814
        Removal and Installation of Main Frame...1814
      Group 4 Engine...1822
        Removal and Installation of Engine...1822
      Group 8 Pump Device...1856
        Removal and Installation of Pump Device...1856
        Removal and Installation of Coupling...1868
        Disassembly of Pump Device...1870
        Assembly of Pump Device...1878
        Disassembly of Regulator...1890
        Assembly of Regulator...1892
        Disassembly of Solenoid Valve Unit...1894
        Assembly of Solenoid Valve Unit...1896
        Structure of Pilot Pump...1898
      Group 9 Control Valve...1900
        Removal and Installation of Control Valve...1900
        Disassembly of Housing...1924
        Assembly of Housing...1926
        Disassembly of Control Valve (A Side)...1928
        Assembly of Control Valve (A Side)...1936
        Disassembly of Control Valve (B Side)...1948
        Assembly of Control Valve (B Side)...1957
      Group 10 Swing Device...1970
        Removal and Installation of Swing Device...1970
        Disassembly of Swing Reduction Gear...1974
        Assembly of Swing Reduction Gear...1979
        Disassembly of Swing Motor...1986
        Assembly of Swing Motor...1989
      Group 11 Pilot Valve...1992
        Removal and Installation of Pilot Valve (Left)...1992
        Removal and Installation of Pilot Valve (Right)...2004
        Removal and Installation of Travel Pilot Valve...2020
        Disassembly of Pilot Valves (Right and Left)...2024
        Assembly of Pilot Valves (Right and Left)...2027
        Disassembly of Travel Pilot Valve...2030
        Assembly of Travel Pilot Valve...2034
      Group 12 Solenoid Valve...2040
        Removal and Installation of Pilot Shut-Off Solenoid Valve...2040
        Removal and Installation of 5-Spool Solenoid Valve Unit...2044
        Removal and Installation of 2-Spool Solenoid Valve Unit...2048
        Disassembly of Pilot Shut-Off Solenoid Valve...2052
        Assembly of Pilot Shut-Off Solenoid Valve...2054
        Structure of 5-Spool Solenoid Valve Unit...2056
        Structure of 2-Spool Solenoid Valve Unit...2058
      Group 13 Signal Control Valve...2060
        Removal and Installation of Signal Control Valve...2060
        Structure of Signal Control Valve...2064
      Group 14 Aftertreatment Device...2068
        Removal and Installation of Aftertreatment Device...2068
      Group 15 DEF Tank...2092
        Removal and Installation of DEF Tank...2092
      Group 16 Coolant Control Valve...2106
        Removal and Installation of Coolant Control Valve...2106
      Group 17 DEF Supply Module...2108
        Removal and Installation of DEF Supply Module...2108
    SECTION 4 UNDERCARRIAGE...2116
      Group 1 Swing Bearing...2118
        Removal and Installation of Swing Bearing...2118
        Disassembly of Swing Bearing...2124
        Assembly of Swing Bearing...2127
      Group 2 Travel Device...2130
        Removal and Installation of Travel Device...2130
        Disassembly of Travel Device...2134
        Assembly of Travel Device...2138
        Disassembly of Travel Motor...2146
        Assembly of Travel Motor...2149
        Disassembly of Brake Valve...2154
        Assembly of Brake Valve...2156
        Precautions for Using Floating Seal...2158
      Group 3 Center Joint...2160
        Removal and Installation of Center Joint...2160
        Disassembly of Center Joint...2164
        Assembly of Center Joint...2166
        Replacement of Body and Spindle...2169
      Group 4 Track Adjuster...2170
        Removal and Installation of Track Adjuster...2170
        Disassembly of Front Idler...2174
        Assembly of Front Idler...2177
        Disassembly of Track Adjuster...2180
        Assembly of Track Adjuster...2184
        Precautions for Using Floating Seal...2188
      Group 6 Upper and Lower Rollers...2190
        Removal and Installation of Upper Roller...2190
        Removal and Installation of Lower Roller...2196
        Disassembly of Lower Roller...2202
        Assembly of Lower Roller...2204
        Precautions for Using Floating Seal...2206
      Group 7 Track...2208
        Removal and Installation of Track...2208
    SECTION 5 FRONT ATTACHMENT...2218
      Group 1 Front Attachment...2220
        Removal and Installation of Front Attachment...2220
      Group 2 Cylinder...2230
        Removal and Installation of Boom Cylinder...2230
        Removal and Installation of Arm Cylinder...2238
        Removal and Installation of Bucket Cylinder...2246
        Removal and Installation of Positioning Cylinder...2250
        Disassembly of Boom, Arm, and Bucket Cylinders...2256
        Assembly of Boom, Arm, and Bucket Cylinders...2263
        Disassembly of Positioning Cylinder...2272
        Assembly of Positioning Cylinder...2275
      Group 3 Hose Rupture Valve...2278
        Removal and Installation of Hose Rupture Valve for Boom Cylinder...2278
        Removal and Installation of Hose Rupture Valve for Arm Cylinder...2282
        Removal and Installation of Hose Rupture Valve for Positioning Cylinder...2286
        Structure of Hose Rupture Valve for Boom Cylinder (Right)...2290
        Structure of Hose Rupture Valve for Boom Cylinder (Left)...2292
        Structure of Hose Rupture Valve for Arm Cylinder...2294
        Structure of Hose Rupture Valve for Positioning Cylinder...2296
    SERVICE MANUAL REVISION REQUEST FORM...2300