Doosan DX420LC Manuals

Doosan DX420LC Manuals

Manuals and User Guides for Doosan DX420LC. We have 3 Doosan DX420LC manuals available for free PDF download: Instructions Manual, Shop Manual

Doosan DX420LC Instructions Manual

Doosan DX420LC Instructions Manual (894 pages)

Brand: Doosan | Category: Excavators | Size: 59.69 MB

Table of Contents

Table of Contents

11
- Safety Precautions
  13
- Applicable Models
  13
- To the Operator of a DOOSAN Daewoo Excavator
  14
- General Safety Essentials
  18
- Location of Safety Labels
  19
- Summary of Safety Precautions for Lifting in Digging Mode
  20
- Unauthorized Modifications
  21
- General Hazard Information
  21
- Before Starting Engine
  30
- Machine Operation
  34
- Maintenance
  41
- Battery
  50
- Towing
  52
- Shipping and Transportation
  53
- Lifting with Sling
  53
Table of Contents

59
- Applicable Models
  61
- Safety Precautions
  61
- Specification for DX420LC
  61
- General Description
  63
- Component Locations
  64
- General Dimensions (DX420LC)
  66
- Working Range
  68
- General Specifications
  70
- Engine Performance Curves (Per DIN 6270 Standard)
  72
- Approximate Weight of Workload Materials
  74
- Performance Tests
  76
- Excavator Performance Standards
  77
- Test Conditions
  77
- Travel Speed and Travel Motor Balance (Steering Deviation) Tests
  77
- Swing Speed and Deceleration Force Test
  79
- Cylinder Performance Tests
  81
Table of Contents

87
Table of Contents

107
- Applicable Models
  109
- Safety Precautions
  109
- Standard Torques
  109
- Torque Values for Standard Metric Fasteners
  110
- Torque Values for Standard U.S. Fasteners
  111
- Type 8 Phosphate Coated Hardware
  113
- Torque Values for Hose Clamps
  114
- Torque Values for Split Flanges
  115
- Torque Multiplication
  116
- Torque Wrench Extension Tools
  116
- Other Uses for Torque Wrench Extension Tools
  117
- Tightening Torque Specifications (Metric)
  117
Table of Contents

125
- Applicable Models
  127
- Cabin
  127
- Safety Precautions
  127
- Removal
  128
- Installation
  130
Table of Contents

135
- Applicable Models
  137
- Safety Precautions
  137
- General
  138
- Warning for Counterweight and Front Attachment Removal
  138
- Removal
  152
Table of Contents

161
- Applicable Models
  163
- Safety Precautions
  163
- Swing Bearing
  163
- Measuring Bearing Lateral Play
  164
- Measuring Swing Bearing Axial Play
  164
- Operating Recommendation
  164
- Swing Bearing Maintenance
  164
- Disassembly
  165
- Swing Bearing Basic Operation
  165
- Assembly
  167
Table of Contents

171
- Applicable Models
  173
- Safety Precautions
  173
- Swing Reduction Gear
  173
- General Description
  175
- Theory of Operation
  175
- Parts List
  176
- Specifications
  178
- Troubleshooting, Testing and Adjustment
  179
- Removal
  180
- Disassembly
  181
- Assembly
  185
- Shaft and S/R Bearing Shrinkage Fitting
  185
- Assembly of the Carrier Subassembly
  187
- Assembly of Main Case
  195
- Test
  211
- Assembly of the Motor
  213
- Installation
  219
Table of Contents

225
- Track Assembly
  226
- Applicable Models
  227
- Safety Precautions
  227
- General Description
  228
- Track Tension
  228
- Cleaning and Inspection
  231
- Tolerances)
  231
- Track Shoe
  232
- Lower Roller
  234
- Upper Roller
  235
- Front Idler
  236
- Track Removal
  237
- Track Shoes and Links
  237
- Track Installation
  238
- Front Idler Roller
  240
- Parts List
  240
- Front Idler Roller Disassembly
  241
- Front Idler Roller Reassembly
  242
- Lower Roller
  244
- Parts List
  244
- Lower Roller Disassembly
  245
- Lower Roller Removal
  245
- Lower Roller Reassembly
  246
- Lower Roller Installation
  247
- Parts List
  248
- Upper Roller
  248
- Upper Roller Disassembly
  249
- Upper Roller Removal
  249
- Upper Roller Reassembly
  252
- Track Spring and Track Adjusting Cylinder
  254
Table of Contents

265
- Applicable Models
  267
- Safety Precautions
  267
- Air Conditioner System
  268
- Outline
  268
- Internal and External Filters
  269
- Air-Conditioning System Layout
  271
- Air Conditioner/Heater Circuit Diagram
  272
- Air Conditioner/Heater Unit
  273
- Duct Sensor
  277
- Relay - A/C
  277
- Relay - Blower
  277
- Internal Air Temp Sensor
  280
- Water Temp Sensor
  280
- Compressor
  287
- Receiver Dryer
  287
- Troubleshooting
  288
- Weight of R134A Gas Used in Machines
  290
- Refrigerant Safe Handling Procedures
  291
- Refrigerant System Repairs
  291
- Repair and Replacement Procedure
  292
- Refrigerant Recovery
  294
- Vacuuming Refrigerant System
  294
- Leakage Check
  296
- Refrigerant Charging
  296
- Inspecting System for Leakage
  298
Table of Contents

303
- Applicable Models
  305
- Drive Coupling (Main Pump)
  305
- Safety Precautions
  305
- Drive Coupling
  306
- Installation of Drive Coupling
  307
- Installation Procedure
  307
Table of Contents

313
- General Notes
  318
- Hydraulic Schematic
  318
- Boom Operating Circuit
  320
- Operation of Working Components
  320
- Arm Operating Circuit
  321
- Boom down Circuit
  321
- Arm Crowd Circuit
  322
- Arm Dump Circuit
  322
- Bucket Crowd Circuit
  323
- Bucket Dump Circuit
  323
- Bucket Operating Circuit
  323
- Swing Operating Circuit
  323
- Left Swing Operating Circuit
  324
- Right Swing Operating Circuit
  324
- Swing Relief Valve and Makeup Valve
  324
- Travel Operating Circuit
  324
- Forward Travel Circuit
  325
- Reverse Travel Circuit
  325
- Initial Checks and Tests to Establish Operating
  326
- Procedural Troubleshooting Baseline Recommendations
  326
- Adjustment and Testing
  328
- Pilot Pressure
  328
- Current Signal and Hydraulic Pressure Adjustments
  329
- Power Mode Valve
  329
- Boom/Front Priority Valve
  331
- Control Valve Pressure and Current Adjustments
  331
- Pressure up Valve
  332
- Pump Input Power Control
  334
- Pump Regulator Adjustment
  334
- Flow Meter and Flow Meter Kit Installation and Testing
  337
- Precautions/Initial Checks
  339
- Swing Relief Valve Checking and Adjustment
  339
- Swing System Troubleshooting
  339
- Troubleshooting - Swing Gearbox
  342
- Troubleshooting - Hydraulic Problems
  343
- Troubleshooting - Control Valve
  344
- Troubleshooting - Joystick Control Valve
  346
- Troubleshooting - Travel Control Valve
  346
Table of Contents

351
- Applicable Models
  353
- Safety Precautions
  353
- General Description
  354
- Specifications
  356
Table of Contents

359
- Applicable Models
  361
- Safety Precautions
  361
- General Description
  362
- Center Joint Disassembly Diagram
  363
- Disassembly
  364
- Reassembly
  367
Table of Contents

373
- Applicable Models
  375
- Safety Precautions
  375
- General Description
  376
- Theory of Operation
  376
- Parts List
  378
- Piston Nut
  380
- Special Tools and Materials
  380
- Piston Jig
  382
- Steel Bushing Jig
  384
- Dust Wiper Jig
  386
- Slipper Seal Jig
  388
- Slipper Seal Straightening Jig
  390
- Disassembly
  392
- Reassembly
  397
Table of Contents

403
- Applicable Models
  405
- Safety Precautions
  405
- General Description
  406
- Parts List
  406
- Specifications
  408
- Torques
  408
- Theory of Operation
  409
- Makeup Check Valve
  412
- Operation of Swing Reactionless Valve
  412
- Operation of Time Delay Valve
  412
- Tools
  413
- Tools and Materials
  413
- General Precautions
  414
- How to Check Faults of Hydraulic Motor
  414
- Troubleshooting
  414
- Troubleshooting, Testing and Adjustment
  414
- Disassembly
  416
- Disassembly of Drive Shaft Subassembly
  416
- General Cautions
  416
- Disassembly of the Cylinder Block Subassembly
  419
- Disassembly of the Rear Cover Subassembly
  420
- Cleaning and Inspection (Wear Limits and Tolerances)
  423
- General Cautions
  423
- Reassembly
  423
- Reassembly of Drive Shaft Subassembly
  423
- Assembly of Cylinder Block Assembly Subassembly
  426
- Assembly of Rear Cover Assembly Subassembly
  430
- Air Pressure Test
  434
- Oil Leakage Check
  434
- Installation of Test Bench
  435
Table of Contents

439
- Applicable Models
  441
- Safety Precautions
  441
- Travel Motor (with Gearbox)
  441
- Specifications
  442
- Travel Motor (M3V270/160A)
  442
- Structure and Function
  444
- Disassembly and Assembly
  451
- Disassembly
  452
- Reassembly
  456
- Maintenance Standard
  459
- Troubleshooting
  461
- Reduction Gear (M3V270 / 160A-RG7.5)
  463
- Specifications
  463
- Structure and Operation
  464
- Disassembly and Assembly
  466
- Disassembling Reduction Unit
  467
- Assembling
  472
- Maintenance
  479
- Inspection after Assembling
  481
- Brake Valve (RBV - 24DL4)
  482
- Specification
  482
- Structure and Operation
  483
- Disassembling and Reassembling
  489
- Disassembling Procedure
  489
- Reassembling
  490
- Troubleshooting
  492
Table of Contents

495
- Main Pump
  496
- Applicable Models
  497
- Safety Precautions
  497
- A8Vo200La1Kh1/63
  498
- Ectional View
  498
- General Repair Guidelines
  500
- Seal Kits and Sub-Assemblies
  502
- Sealing the Drive Shaft
  506
- Gear Pump Sealing
  508
- Remove the Control Housing
  510
- Control Module
  514
- Control Module LR
  514
- Control Module H
  515
- Removing the Controller
  516
- Valve Plate with Valves
  518
- Remove the Rotary Groups
  519
- Remove the Intermediate Wheel
  522
- Remove Auxiliary Drive
  524
- Inspection
  527
- Re-Fitting the Rotary Group
  532
- Pump Assembly
  534
- Hydraulic Component - Measurement "D
  537
- Measuring Device - Hydraulic Component 452 269
  537
- Mounting Position
  538
- Measuring Procedure
  540
- Installation of Control Housing
  541
- Assembly of Intermediate Wheel
  544
- Installation of Gear Pump
  545
- Installation of Cover / Auxiliary Drive
  546
- Assembly Guidelines for Tightening Torques
  547
Table of Contents

553
- Applicable Models
  555
- Safety Precautions
  555
- General Description
  556
- When All Spools Are in Neutral
  556
- Single Operation
  560
- Combined Operation
  572
- Anti Drift Valve
  575
- Main Relief Valve
  576
- Overload Relief Valve
  577
- Low Pressure Relief Valve
  579
- Parts List
  580
- Specifications
  589
- General
  590
- Troubleshooting, Testing and Adjustment
  590
- Adjustment of Relief Valve
  591
- Hydraulic System
  591
- Relief Valve
  591
- Disassembly
  593
- General Instructions for Disassembly
  593
- Disassembly of Main Spool (3) - (11)
  594
- Disassembly of Anti Drift Valve of Boom and Arm
  595
- Disassembly of Subspool (20)
  595
- Disassembly of Subspool (24)
  595
- Disassembly of Load Check
  596
- Disassembly of Swing Load Check
  596
- Disassembly of Flange
  597
- Disassembly of Other Check Valves
  597
- Disassembly of Relief Valve
  597
- Disassembly of Other Flange
  598
- Disassembly of Main Relief Valve
  599
- Disassembly of Low Pressure Relief Valve
  600
- Disassembly of Overload Relief Valve
  600
- Cleaning
  601
- Cleaning and Inspection
  601
- Inspection
  601
- Tolerances)
  601
- Reassembly
  602
- Subassembly
  602
- Reassembly of Control Valve
  604
- Installation
  610
- Start-Up Procedures
  610
Remote Control Valve (Work Lever / Joystick)/Remote Control Valve (Work Lever / Joystick)

613
- Applicable Models
  615
- Remote Control Valve (Work Lever / Joystick)
  615
- Safety Precautions
  615
- Function
  617
- General Description
  617
- Parts List
  618
- Specifications
  620
- Tools and Materials
  620
- Torques
  620
- Disassembly
  621
- Cleaning and Inspection (Wear Limits and Tolerances)
  625
- Reassembly
  625
- Start-Up Procedures
  631
Table of Contents

635
- Applicable Models
  637
- Safety Precautions
  637
- Travel Control Valve (with Damper)
  637
- General Description
  639
- Theory of Operation
  639
- Deceleration Valve
  640
- Dampening Parts of the Control Section
  641
- Causes of Faults and Measures
  643
- Parts List
  644
- Specifications
  645
- Torques
  645
- Removal
  646
- Disassembly
  647
- Cleaning and Inspection (Wear Limits and Tolerances)
  650
- Assembly
  651
- Installation
  657
- Start-Up Procedures
  658
Table of Contents

661
- Applicable Models
  663
- Safety Precautions
  663
- Solenoid Valve Assembly
  663
- Parts List
  664
- Functions of 5-Solenoid Valve Assembly Package
  665
- Functions of Solenoid Valve Assembly Package
  665
- Assembly Diagram and Tools Required
  667
- Solenoid Valve Diagram
  669
- Check Points and Solutions for Problems
  670
Table of Contents

675
- Applicable Models
  677
- Breaker EPPR Valve (Opt)
  677
- Safety Precautions
  677
- Numbers and Names of Parts
  678
- Structure
  678
- Cautions for Operation
  679
- Functions and Operation
  679
- Maintenance
  680
- Maintenance Instructions
  680
- Disassembly
  681
- Assembly
  682
Table of Contents

687
- Applicable Models
  689
- Fan Motor (Vane Type)
  689
- Safety Precautions
  689
- Parts List
  690
- Applications
  691
- Description
  691
- General
  691
- Introduction and Description
  691
- Operation
  692
- Operating Characteristics - Typical
  693
- Performance Data
  693
- Loads on Shaft
  694
- Loads on Shaft
  695
- Misalignment
  695
- Mounting Flange
  695
- Mounting Flange and Coupling
  695
- Splined Shafts
  695
- Pipe
  696
- Pipe Connection
  696
- Shafts
  696
- Taper Shafts
  696
- External Drain
  697
- Flange Connections
  697
- Cleanliness and Seals
  698
- Fluid Cleanliness
  698
- Seals S1 : Nbr (Nitrile Base Polymere)
  698
- Seals S4 : Epr (Ethylene Propylene Polymere)
  698
- Seals S5 : Fpm (Fluorocarbon)
  698
- Disassembly
  699
- General
  699
- Maintenance
  699
- Reassembly
  701
- Changing Porting Position
  703
- Cold Starting
  703
- Priming
  703
- Cartridge Replacement
  704
- End Cap Replacement
  704
- Shaft Replacement
  704
- Shaft Seal Replacement
  704
- Couping Dimensions
  705
- Seal Driver
  705
- Taper Keyed Shafts
  705
Table of Contents

709
- Applicable Models
  711
- Safety Precautions
  711
- Disassembling Single Gear Pump
  712
- Reassembling Single Gear Pump
  715
- Disassembling Double Gear Pump(Opt)
  718
- Reassembling Double Gear Pump(Opt)
  721

Advertisement

Doosan DX420LC Instructions Manual

Doosan DX420LC Instructions Manual (810 pages)

Track Excavator

Brand: Doosan | Category: Excavators | Size: 49.93 MB

Table of Contents

Table of Contents

11
- Track Excavator Safety
  13
- Safety Precautions
  13
- Applicable Models
  13
- To the Operator of a DOOSAN Excavator
  14
- General Safety Essentials
  17
- Location of Safety Labels
  18
- Summary of Safety Precautions for Lifting in Digging Mode
  18
- Unauthorized Modifications
  19
- General Hazard Information
  19
- Before Starting Engine
  28
- Machine Operation
  32
- Maintenance
  39
- Battery
  47
- Towing
  49
- Shipping and Transportation
  50
- Lifting with Sling
  50
Table of Contents

55
- Applicable Models
  57
- Safety Precautions
  57
- General Description
  59
- Component Locations
  60
- General Dimensions
  62
- Working Range
  64
- General Specifications
  66
- Engine Performance Curves (Per DIN 6270 Standard)
  68
- Approximate Weight of Workload Materials
  70
- Performance Tests
  72
- Excavator Performance Standards
  73
- Test Conditions
  73
- Travel Speed and Travel Motor Balance (Steering Deviation) Tests
  73
- Swing Speed and Deceleration Force Test
  75
- Cylinder Performance Tests
  77
Table of Contents

83
Table of Contents

103
- Applicable Models
  105
- Safety Precautions
  105
- Torque Values for Standard Metric Fasteners
  106
- Torque Values for Standard U.S. Fasteners
  107
- Type 8 Phosphate Coated Hardware
  109
- Torque Values for Hose Clamps
  110
- Torque Values for Split Flanges
  111
- Torque Multiplication
  112
- Torque Wrench Extension Tools
  112
- Other Uses for Torque Wrench Extension Tools
  113
- Tightening Torque Specifications (Metric)
  114
Table of Contents

121
- Applicable Models
  123
- Cabin
  123
- Safety Precautions
  123
- Removal
  124
- Installation
  128
Table of Contents

133
- Applicable Models
  135
- Safety Precautions
  135
- General
  136
- Warning for Counterweight and Front Attachment Removal6
  136
- Removal
  138
- Installation
  139
Table of Contents

143
- Applicable Models
  145
- Safety Precautions
  145
- General Description
  146
- Parts List
  146
- Specifications
  147
- Removal
  148
- Installation
  152
- Start-Up Procedures
  155
Table of Contents

159
- Applicable Models
  161
- Safety Precautions
  161
- General Description
  162
- Theory of Operation
  162
- Replacement of Rotor and Vane
  163
- Troubleshooting
  163
- Replacement of Armature
  164
- Replacement of Rear Cover
  164
Table of Contents

167
- Applicable Models
  169
- Safety Precautions
  169
- Measuring Bearing Lateral Play
  170
- Measuring Swing Bearing Axial Play
  170
- Operating Recommendation
  170
- Swing Bearing Maintenance
  170
- Disassembly
  171
- Swing Bearing Basic Operation
  171
- Assembly
  173
Table of Contents

177
- Applicable Models
  179
- Safety Precautions
  179
- General Description
  181
- Theory of Operation
  181
- Parts List
  182
- Specifications
  183
- Troubleshooting, Testing and Adjustment
  184
- Removal
  185
- Disassembly
  186
- Cleaning and Inspection (Wear Limits and Tolerances)
  195
- Assembly of Carrier Subassemblies
  196
- Reassembly
  196
- Shaft and S/R Bearing Heat-Fit
  196
- Assembly of Main Case
  202
- Assembly of Motor
  218
- Installation
  222
- Start-Up Procedures
  223
Table of Contents

229
- Applicable Models
  231
- Safety Precautions
  231
- General Description
  232
- Track Tension
  233
- Cleaning and Inspection
  235
- Track Shoe
  236
- Lower Roller
  238
- Upper Roller
  239
- Front Idler
  240
- Track Removal
  241
- Track Shoes and Links
  241
- Track Installation
  242
- Front Idler Roller
  244
- Parts List
  244
- Front Idler Roller Disassembly
  245
- Front Idler Roller Reassembly
  247
- Lower Roller
  248
- Parts List
  248
- Lower Roller Disassembly
  249
- Lower Roller Removal
  249
- Lower Roller Reassembly
  250
- Lower Roller Installation
  251
- Parts List
  252
- Upper Roller
  252
- Upper Roller Disassembly
  253
- Upper Roller Removal
  253
- Upper Roller Reassembly
  255
- Parts List
  256
- Track Spring and Track Adjusting Cylinder
  256
Table of Contents

261
- Applicable Models
  263
- Safety Precautions
  263
- Drive Coupling
  264
- Special Tools
  265
- Drive Coupling Installation
  266
- Installation Procedure
  268
Hydraulic System Troubleshooting, Testing and Adjustment/Hydraulic System Troubleshooting, Testing and Adjustment

273
- Hydraulic System Troubleshooting, Testing and Adjustment
  274
- Applicable Models
  275
- Safety Precautions
  275
- General Notes
  276
- Hydraulic System - General Notes
  276
- Boom down Circuit
  279
- Boom Operating Circuit
  279
- Boom up Circuit
  279
- Operation of Working Components
  279
- Arm Crowd Circuit
  280
- Arm Dump Circuit
  280
- Arm Operating Circuit
  280
- Bucket Crowd Circuit
  281
- Bucket Dump Circuit
  281
- Bucket Operating Circuit
  281
- Swing Operating Circuit
  281
- Left Swing Operating Circuit
  282
- Right Swing Operating Circuit
  282
- Swing Relief Valve and Makeup Valve
  282
- Travel Operating Circuit
  282
- Forward Travel Circuit
  283
- Reverse Travel Circuit
  283
- Initial Checks and Tests to Establish Operating Condition of the Excavator
  284
- Procedural Troubleshooting Baseline Recommendations
  284
- Adjustment and Testing
  286
- Pilot Pressure
  286
- Current Signal and Hydraulic Pressure Adjustments
  287
- Power Mode Valve
  287
- Checks and Adjustments
  288
- Pressure up Valve
  288
- Pump Input Power Control
  290
- Pump Regulator Adjustment
  290
- Flow Meter and Flow Meter Kit Installation and Testing
  293
- Precautions/Initial Checks
  295
- Swing System Troubleshooting
  295
- Swing Relief Valve Checking and Adjustment
  296
- Troubleshooting - Swing Gearbox
  298
- Troubleshooting - Hydraulic Problems
  299
- Troubleshooting - Control Valve
  301
- Troubleshooting - Travel Control Valve
  302
- Troubleshooting - Joystick Control Valve
  303
Table of Contents

307
- Applicable Models
  309
- Safety Precautions
  309
- General Description
  310
- Specifications
  312
Table of Contents

315
- Applicable Models
  317
- Safety Precautions
  317
- General Description
  318
- Parts List
  319
- Inspection
  320
- Testing
  320
- Troubleshooting, Testing and Adjustment
  320
- Disassembly
  321
- Reassembly
  324
Table of Contents

329
- Applicable Models
  331
- Safety Precautions
  331
- General Description
  332
- Theory of Operation
  332
- Parts List
  334
- Piston Nut
  336
- Special Tools and Materials
  336
- Piston Jig
  338
- Steel Bushing Jig
  340
- Dust Wiper Jig
  342
- Slipper Seal Jig
  344
- Slipper Seal Straightening Jig
  346
- Disassembly
  348
- Reassembly
  353
Table of Contents

359
- Applicable Models
  361
- Safety Precautions
  361
- General Description
  362
- Theory of Operation
  362
- Makeup Check Valve
  365
- Operation of Swing Reactionless Valve
  365
- Operation of Time Delay Valve
  365
- Parts List
  366
- Specifications
  368
- Torques
  368
- Tools
  369
- Tools and Materials
  369
- General Precautions
  370
- How to Check Faults of Hydraulic Motor
  370
- Troubleshooting
  370
- Troubleshooting, Testing and Adjustment
  370
- Disassembly
  372
- General Cautions
  372
- Cleaning and Inspection (Wear Limits and Tolerances)
  379
- Assembly
  380
- General Cautions
  380
- Reassembly
  380
- Assembly of Cylinder Block Assembly Subassembly
  383
- Assembly of Rear Cover Assembly Subassembly
  387
- Air Pressure Test
  393
- Oil Leakage Check
  393
Table of Contents

397
- Applicable Models
  399
- Safety Precautions
  399
- General Description
  401
- Structure
  401
- Operation Basics
  402
- Parts List
  408
- Connection Torque
  410
- Specifications
  410
- General Precautions
  412
- How to Check Faults of Hydraulic Motor
  412
- Troubleshooting
  412
- Troubleshooting, Testing and Adjustment
  412
- Disassembly
  414
- General Cautions
  414
- Disassembly of Cylinder Subassembly
  420
- Cleaning and Inspection
  422
- Maintenance Standard
  422
- Tolerances)
  422
- General Cautions
  426
- Reassembly
  426
- Reassembly of Drive Shaft Subassembly
  426
- Assembly of Valve Casing Subassembly
  427
- Assembly of Cylinder Subassembly
  431
- Assembly of Motor Body
  433
Table of Contents

441
- Applicable Models
  443
- Safety Precautions
  443
- Axial Piston Pump
  444
- General Description
  444
- Model Number Designation
  444
- Theory of Operation
  445
- Parts List
  446
- Torques
  448
- Tools
  449
- Troubleshooting, Testing and Adjustment
  451
- Disassembly
  453
- Cleaning and Inspection (Wear Limits and Tolerances)
  456
- Worn Part Replacement Criteria
  456
- Correction Criteria for Cylinder, Valve Plate and
  457
- Plate (Shoe Plate)
  457
- Reassembly
  458
- Cautions During Starting Operation
  462
- Oil Filling and Air Venting
  462
- Start-Up Procedures
  462
- General Description
  463
- Model Number Designation
  463
- Regulator for Axial Piston Pump
  463
- Parts List
  464
- Outline
  465
- Functional Explanations
  467
- Specifications
  467
Table of Contents

487
- Applicable Models
  489
- Gear Pump
  489
- Safety Precautions
  489
- Disassembly
  490
- Single Gear Pump
  490
- Reassembly
  492
- Disassembly
  496
- Double Gear Pump
  496
- Reassembly
  498
Table of Contents

505
- Parts List
  540
- Specifications
  545
- Troubleshooting
  546
- Troubleshooting, Testing and Adjustment
  546
- Adjustment of Valves
  547
- Disassembly
  549
- Cleaning
  559
- Cleaning and Inspection (Wear Limits and Tolerances)
  559
- Inspection
  559
- Caution on Assembly
  560
- Reassembly
  560
- Sequence of Subassembly
  561
- Maintenance of Relief Valves
  567
- Installation
  570
- Start-Up Procedures
  570
Table of Contents

573
- Applicable Models
  575
- Safety Precautions
  575
- General Description
  577
- Theory of Operation
  577
- Parts List
  578
- Specifications
  580
- Tools and Materials
  580
- Torques
  580
- Disassembly
  581
- Cleaning and Inspection
  585
- Reassembly
  585
- Tolerances)
  585
- Start-Up Procedures
  592
Table of Contents

621
- Applicable Models
  623
- Safety Precautions
  623
- 5-Solenoid Valve
  624
- Parts List
  624
- Functions of 5-Solenoid Valve Assembly
  625
- Assembly Diagram and Tools Required
  628
- Cautions During Disassembly and Reassembly
  629
- Solenoid Valve Diagram
  630
- Check Points and Solutions for Problems
  631
- 2-Solenoid Valve
  632
- Parts List
  632
- Assembly Diagram and Tools Required
  633
- Cautions During Disassembly and Reassembly
  634
- Solenoid Valve Diagram
  635
Table of Contents

639
- Applicable Models
  641
- Breaker EPPR Valve (Opt)
  641
- Safety Precautions
  641
- Numbers and Names of Parts
  642
- Structure
  642
- Cautions for Operation
  643
- Functions and Operation
  643
- Maintenance
  644
- Maintenance Instructions
  644
- Disassembly
  645
- Assembly
  646

Doosan DX420LC Shop Manual

Doosan DX420LC Shop Manual (110 pages)

Serial Number 5001 and Up

Brand: Doosan | Category: Excavators | Size: 9.64 MB

Table of Contents

Table of Contents

8
- Specifications
  3
- Track Excavator Safety
  6
- Safety Precautions
  9
- Applicable Models
  9
- To the Operator of a DOOSAN Excavator
  10
- General Safety Essentials
  10
  - Specifications
    11
- Location of Safety Labels
  15
- Summary of Safety Precautions for Lifting in Digging Mode
  16
- Unauthorized Modifications
  17
- General Hazard Information
  17
  - Cabin
    18
  - Emergency Exit
    25
- Before Starting Engine
  26
- Machine Operation
  30
  - Traveling on Slopes
    32
  - Prohibited Operations
    32
  - Parking Machine
    36
- Maintenance
  37
  - Specifications
    38
- Battery
  46
- Towing
  48
- Shipping and Transportation
  49
- Lifting with Sling
  49
  - Specifications
    50
Specification

52
- Specifications
  52
- Applicable Models
  53
- Safety Precautions
  53
- General Description
  54
- Component Locations
  55
  - Swing Bearing
    56
- General Dimensions
  57
- Working Range
  58
- General Specifications
  60
- Engine Performance Curves (Per DIN 6270 Standard)
  62
- Approximate Weight of Workload Materials
  64
- Performance Tests
  66
- Excavator Performance Standards
  67
General Maintenance Procedures

75
- Applicable Models
  76
- Safety Precautions
  76
- Welding Precautions and Guidelines
  77
- Hydraulic System - General Precautions
  78
  - Cylinders
    78
- Maintenance Service and Repair Procedure
  80
  - General Precautions
    80
  - Swing Motor
    80
- Hydraulic System Cleanliness and Oil Leaks
  81
  - Maintenance Precautions for Hydraulic System Service
    81
  - Oil Leakage Precautions
    82
- Cleaning and Inspection
  83
  - General Guidelines
    83
  - Bearing Inspection
    84

Advertisement

Advertisement

Related Products

Doosan Categories

Air Compressor Excavators Engine Forklifts Compact Loader

More Doosan Manuals