Complete workshop & service manual with electrical wiring diagrams for Doosan DX420LC Crawler Excavator. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Doosan DX420LC Crawler 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.

“K1009096E.pdf”
Doosan DX420LC Crawler Excavator Shop Manual
Serial Number 5001 and Up; K1009096E; 900 pages

TABLE OF CONTENTS
Safety
Track Excavator Safety....................... SP000256
Specifications
Specification for DX420LC.................. SP000257
General Maintenance
General Maintenance Procedures............................... SP000016
Standard Torques............................... SP000017
Upper Structure
Cabin ......................... SP000018
Counterweight............ SP000265
Fuel Tank................... SP000264
Swing Bearing............ SP000262
Swing Reduction Gear........................ SP000249
Lower Structure and Chassis
Track Assembly ......... SP000263
Air Conditioner ........... SP000025
Engine and Drive Train
Drive Coupling (Main Pump)............... SP000026
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment ............... SP000273
Accumulator............... SP000028
Center Joint (Swivel)........................... SP000181
Cylinders.................... SP000030
Swing Motor............... SP000261
Travel Motor (With Gearbox) .............. SP000266
Main Pump................. SP000186
Control Valve (KVMG-400-DA)........... SP000187
Remote Control Valve (Work Lever / Joystick) ............ SP000189
Travel Control Valve (With Damper)............................ SP000070
Solenoid Valve Assembly ................... SP000191
Breaker EPPR Valve (Opt) ................. SP000192
Fan Motor (Vane Type)....................... SP000209
Gear Pump (Fan Cooling Drive) ......... SP000208
Fan Cooling Flow In-Out Change Valve ...................... SP000207
Hydraulic Schematic (DX420LC)........ SP000274
Electrical System
Electrical System ................................ SP000269
Electrical Schematic (DX420LC) ........ SP000275
Attachments
Boom and Arm........... SP000040
Bucket........................ SP000041
…
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“K1009096AE.pdf”
Doosan DX420LC Crawler Excavator Shop Manual
Serial Number 5327 and Up; K1009096AE; 862 pages

1Table of Contents
Safety
Track Excavator Safety....................... SP000907
Specifications
Specification for DX420LC.................. SP001755
General Maintenance
General Maintenance Procedures............................... SP000016
Standard Torques............................... SP000813
Upper Structure
Cabin ......................... SP001737
Counterweight............ SP001756
Fuel Tank................... SP001757
Fuel Transfer Pump (Opt)................... SP000021
Swing Bearing............ SP001856
Swing Reduction Gear........................ SP001740
Lower Structure and Chassis
Track Assembly ......... SP000263
Engine and Drive Train
Drive Coupling (Main Pump)............... SP000026
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment ............... SP001758
Accumulator............... SP000028
Center Joint (Swivel)........................... SP000181
Cylinders.................... SP000030
Swing Motor............... SP000261
Travel Motor (With Gearbox) .............. SP000266
Main Pump................. SP000186
Gear Pump (Fan Cooling Drive) ......... SP000208
Main Control Valve ............................. SP000187
Remote Control Valve (Work Lever / Joystick) ............ SP000189
Travel Control Valve (With Damper)............................ SP001743
Fan Motor (Vane Type)....................... SP000209
Fan Cooling Flow In-Out Change Valve ...................... SP000207
Solenoid Valve Assembly ................... SP001622
Breaker EPPR Valve (Opt) ................. SP000192
Hydraulic Schematic (DX420LC)........ SP001769
Electrical System
Electrical System................................ SP001759
Electrical Schematic DX420LC........... SP001857
Attachments
Boom and Arm........... SP001851
Bucket........................ SP001852
…

EXCERPT:
REMOVAL
1. Look at fuel level display (Figure 2) on instrument panel in operator's cabin to see what it displays. The display is divided into ten separated segments, each representing 10
percent of total fuel supply. Also, look at level gauge on side of tank to estimate volume of fuel left in tank.
NOTE: If possible, work excavator until available fuel supply in tank has been run down as far as possible.
2. Park on firm and level ground and swing turntable to approximately a 90° with respect to tracks. See Figure 3.
3. Lower front attachment (bucket) to ground.
4. Shut down engine.
5. Set safety lever on "RELEASED" position.
6. Turn starter switch to "I" (ON) position.
…