Part of the Doosan Repair Manuals.
The N in DX235NLC-5 means narrow undercarriage: 2,540 mm (8' 4") wide with 500 mm (1' 8") shoes, built to travel on a lowboy and squeeze into tight rights of way where a standard car body will not fit. This 2015 factory shop manual (publication 950106-01115E, 1st Edition) covers the Tier 4 Final machine with the Doosan DL 06P engine rated 167 HP (169 PS) @ 1,800 rpm. Inside: full teardown and rebuild procedures for the main pump, main control valve, swing device, travel valve and joystick valves, boom and arm removal for both one-piece and two-piece booms, the electrical supply and starting circuits, and oversize foldout hydraulic and electrical schematics at the back.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-74 | Track Excavator Maintenance Safety, Safety Messages, Safe Operation Is Operator's Responsibility, Know Your Machine, Proper Work Tools and Attachments, Pressurized Fluids |
| Specifications | 75-108 | General Description, Component Locations, Overall Dimensions, One - Piece Boom, Two - Piece Boom |
| General Maintenance | 109-146 | General Maintenance Instructions, Welding Precautions and Instructions, Hydraulic System - General Precautions, Maintenance Service and Repair Procedure, General Precautions, Hydraulic System Cleanliness and Oil Leaks |
| Engine | 147-328 | Overview, General Information, General Description, Engine Maintenance, Inspection and Repair of the Engine |
| Upper Structure - Cabin | 329-356 | Cabin, Cabin Identification, Roll-Over Protective Structure (ROPS), Removal, Installation, Completing Work |
| Upper Structure - Counterweight and Hydraulic Oil Tank | 357-384 | Counterweight, Warning for Counterweight and Front Attachment Removal, Removal, Installation, Hydraulic Oil Tank, Specification |
| Upper Structure - Fuel Tank | 385-398 | Fuel Tank, Specification, Parts List, Removal, Installation, Completing Work |
| Upper Structure - Main Pump | 399-464 | Main Pump, Axial Piston Pump, Specifications, Overview, Parts List, Theory of Operation |
| Upper Structure - Drive Coupling (Main Pump) | 465-476 | Drive Coupling (Main Pump), Specification, Parts List, Section View, Tools, Disassembly |
| Upper Structure - Main Control Valve | 477-568 | Main Control Valve, Specification, Overview, Parts List, Theory of Operation, Cautions for Operation |
| Upper Structure - Swing Device | 569-630 | Swing Device, Specification, Overview, Parts List, Theory of Operation, Cautions for Operation |
| Upper Structure - Joystick Valve (Work Lever) | 631-662 | Joystick Valve (Work Lever), Specifications, Overview, Parts List, Theory of Operation, Tools and Torques |
| Upper Structure - Travel Control Valve (with Damper) | 663-690 | Travel Control Valve (with Damper), Specification, Overview, Parts List, Theory of Operation, Tools and Torques |
| Upper Structure - Solenoid Valve to Accumulator | 691-718 | Solenoid Valve, Specification, Overview, Parts List, Theory of Operation, Disassembly and Reassembly |
| Upper Structure - Gear Pump (Rotating) | 719-732 | Gear Pump (Rotating), Specification, Overview, Location, Parts List, Single Gear Pump |
| Upper Structure - One Spool Valve(Rotating) | 733-748 | One Spool Valve(Rotating), Specification, Overview, Theory of Operation, Disassembly and Assembly, General Cautions |
| Lower Structure and Chassis | 749-886 | Swing Bearing, General Description, Parts List, Maintenance Guidelines, Disassembly, Reassembly |
| Front | 887-948 | Boom and Arm, Specifications, One - Piece Boom, Two - Piece Boom, Removal, Arm Removal |
| Hydraulic System | 949-1030 | General Description, Hydraulic Schematic, Hydraulic Component and Oil Flow, Hydraulic Components, Main Oil Circuit |
| Electrical System | 1031-1222 | Electrical Supply System, Engine Starting Circuit, Start Operation, After Start, Engine Preheating System |
| Options | 1223-1314 | One Way, General Description, Theory of Operation, Hydraulic Circuit, Caution for Installation, Installation Procedure |
| Schematic | 1315-1320 | Hydraulic Schematic / Electrical Schematic |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine model | Doosan DL 06P, US EPA Tier 4 Final (EU Stage IV) | p. 166 |
| Rated net power | 167 HP (169 PS) @ 1,800 rpm (SAE J1995) | p. 166 |
| Main relief pressure | high 348 bar (355 kg/cm², 5,047 psi) at 136 L/min; low 328 bar | p. 481 |
| Main pump rated flow | 250 L/min (50 L/min in neutral) | p. 481 |
| Tail swing radius | 2,755 mm (9' 0") | p. 86 |
| Counterweight clearance | 1,090 mm (3' 7") | p. 86 |
| Track length | 4,445 mm (14' 7") | p. 86 |
| Undercarriage width | 2,540 mm (8' 4") | p. 86 |
| Shoe width | 500 mm (1' 8") | p. 86 |
| Shipping length | 8,925 mm (29' 3") | p. 86 |
| Height over cabin | 2,985 mm (9' 10") | p. 86 |
| Car body clearance | 475 mm (1' 7") | p. 86 |
