Complete workshop & service manual with electrical wiring diagrams for Doosan DX235LCR, DX235NLC 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 DX235LCR, DX235NLC 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.

“950106-00303.pdf”
Doosan DX235LCR, DX235NLC Crawler Excavator Shop Manual
950106-00303; Serial Number 50001 and Up; 808 pages

TABLE OF CONTENTS
Safety
Track Excavator Safety ...................................... SP000014
Specifications
Specification for DX235NLC .............................. SP002177
General Maintenance
General Maintenance Procedures ..................... SP000016
Standard Torques .............. SP000813
Upper Structure
Cabin .................................. SP000943
Counterweight..................... SP000940
Fuel Tank........................... SP001014
Fuel Transfer Pump .......... SP000021
Swing Bearing.................... SP001109
Swing Reduction Gear ....................................... SP000915
Lower Structure and
Chassis
Track Assembly ................. SP000911
Engine and Drive Train
Drive Coupling (Main Pump) ............................. SP001069
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment ........... SP002178
Accumulator........................ SP000028
Center Joint (Swivel) ......... SP001620
Cylinders............................. SP000030
Swing Motor ....................... SP001013
Travel Motor....................... SP001621
Gear Pump......................... SP000931
Main Control Valve............ SP001024
Axial Piston Pump............. SP001008
PTO Server ........................ SP000933
Remote Control Valve (Work Lever / Joystick) ................................ SP001646
Travel Control Valve (with Damper) ................. SP001647
Solenoid Valve Assembly................................... SP001622
Breaker EPPR Valve (Opt)................................ SP000192
Hydraulic Schematic (DX225NLC/DX235NLC)................................... SP001057
Electrical System
Electrica System................ SP002182
Electrical Schematic (DX180LC/DX225LC/DX225NLC/DX235NLC).. SP000936
Attachments
Boom and Arm.................. SP000937
Bucket................................. SP000939
…

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“950106-00081E.pdf”
Doosan DX235LCR Crawler Excavator Shop Manual
950106-00081E; Serial Number 5001 and Up; 784 pages

TABLE OF CONTENTS
Safety
Track Excavator Safety....... SP002112
Specifications
Specification for DX235LCR................................ SP002113
General Maintenance
General Maintenance Procedures....................... SP000016
Standard Torques............... SP000813
Upper Structure
Cabin .................................. SP001938
Counterweight..................... SP002114
Fuel Tank............................ SP002115
Fuel Transfer Pump............ SP000021
Swing Bearing..................... SP000022
Lower Structure and
Chassis
Track Assembly .................. SP002116
Engine and Drive Train
Drive Coupling (Main Pump)................................ SP002117
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment ............... SP002118
Accumulator........................ SP000028
Center Joint (Swivel)........... SP001620
Cylinders............................. SP002119
Swing Device...................... SP002120
Travel Motor........................ SP001621
Main Pump and PTO .......... SP000988
Gear Pump ......................... SP000931
Main Control Valve ............. SP001024
Remote Control Valve (Work Lever / Joystick) ..................................... SP000069
Travel Control Valve (with Damper)..................... SP002130
Solenoid Valve Assembly .................................... SP001944
Breaker EPPR Valve (Opt) .................................. SP000192
Hydraulic Schematic (DX235LCR) ...................... SP002121
Electrical System
Electrical System ................ SP002122
Electrical Schematic (DX235LCR)....................... SP002123
Attachments
Boom and Arm.................... SP002124
Bucket................................. SP000939
…

EXCERPT:
GENERAL DESCRIPTION
Theory of Operation
When All Spools are in Neutral
Neutral Passage
The oil supplied from the port (P1) enters into the tank passage (Ta) through the orifice (Lc 1) of negative relief from the neutral passage (L1) and returns to ports (T1, T2 and T3).
The oil supplied from the port (P2) passes the tank passage (Ta) through orifice (Rc 1) of negative relief from the neutral passage (R1) and returns to port (T1, T2 and T3).
The pressure of chambers (L2 and R2) flowing over the negative relief, flows into pump from ports (ps1 and ps2), to control the volume of pump P1 and P2.
In addition, when excessive oil flows excessive into the neutral passage, the negative relief operates to prevent the abnormally high-pressure on ports (ps1 and ps2).
…