Part of the Doosan Repair Manuals.
Within the hour you could have a gauge on the DX140LCR-3's hydraulics, checking main relief against 330 kg/cm2 (4,689 psi) instead of guessing. This Doosan shop manual, publication 950106-01021E from December 2012, covers serial number 1001 and up.
It covers the cabin and counterweight, the swing bearing and swing reduction gear, and the undercarriage from track tension to the idler and rollers. The hydraulics section takes in the main pump, travel device, swing motor and cylinders, and the electrical section covers the EPOS-controlled machine. A full Cummins QSB4.5 engine service section is bound in, along with fold-out hydraulic and electrical schematics.
Every hour the excavator sits, an operator and a truck are waiting on you. Find the fault, set it to spec and get the bucket back in the dirt.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Cover & Table of Contents | 1-4 | Cover, Publication 950106-01021E, Table of Contents |
| Safety | 5-74 | Track Excavator Maintenance Safety, Safety Messages, Safety Decals, General, Transportation, Operation, Maintenance, Environment and Circumstances |
| Specifications | 75-104 | Specifications for DX140LCR-3, Component Locations, General Dimensions, Working Range, General Specifications, Engine Performance Curves (per DIN 6271 Standard), Approximate Weight of Workload Materials, Performance Tests |
| General Maintenance | 105-142 | General Maintenance Instructions, Standard Torques, Welding Precautions and Instructions, Hydraulic System - General Precautions, Maintenance Service and Repair Procedure, Hydraulic System Cleanliness and Oil Leaks, Cleaning and Inspection, Torque Values for Standard Metric Fasteners |
| Upper Structure | 143-242 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump (Option), Swing Bearing, Swing Reduction Gear, Cabin Identification, General |
| Lower Structure and Chassis | 243-274 | Track Assembly, Track Tension, Track Shoes and Links, Front Idler Roller, Lower Roller, Upper Roller, Track Spring and Track Adjusting Cylinder |
| QSB4.5 Engine (Cummins Service Section) | 275-572 | QSB4.5 Engine, General Information, Engine Identification, Operating Instructions, Maintenance Guidelines, Maintenance Procedures at Daily Interval, Maintenance Procedures at 250 Hours or 3 Months, Maintenance Procedures at 500 Hours or 6 Months |
| Drive Coupling (Main Pump) | 573-582 | Drive Coupling, Installation of Drive Coupling |
| Hydraulics | 583-946 | Hydraulic System Troubleshooting, Testing and Adjustment, Accumulator, Center Joint (Swivel), Cylinders, Swing Motor, Travel Device, Main Pump, Gear Pump |
| Hydraulic Schematic | 947-954 | Hydraulic Schematic (DX140LCR-3) |
| Electrical System | 955-1076 | Introduction, Electrical Supply System, Engine Starting Circuit, Engine Preheating System, Engine Stop, Charging System, Monitoring System, Operation |
| Electrical Schematic | 1077-1084 | Fold-Out Electrical Schematic (DX140LCR-3) |
| Attachments | 1085-1114 | Boom and Arm, Bucket, Front Attachment Pin Specifications, Front Attachment - Removal and Installation, Start-Up Procedures, Bucket Tooth Inspection and Replacement, Bucket O-Ring Replacement |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine model | QSB4.5 | p. 95 |
| Engine power (DIN 6271) | 110 ps @ 2,200 rpm (81 kW @ 2,200 rpm) | p. 95 |
| Engine max. torque | 489 Nm @ 1,500 rpm (49.8 kg•m @ 1,500 rpm) | p. 95 |
| Fuel consumption (rated) | 165 g/kw•hr | p. 95 |
| Alternator | 24V x 70A | p. 95 |
| Shipping weight | 15.1 tons (33,289 lb) | p. 92 |
| Counterweight | 3,500 kg (7,716 lb) | p. 92 |
| Fuel tank capacity | 220 liters (58 U.S. gal) | p. 92 |
| Hydraulic system capacity | Full: 131 liters (34.6 U.S. gal), System: 161 liters (42.5 U.S. gal) | p. 92 |
| Hydraulic reservoir capacity | 85 liters (22.4 U.S. gal) | p. 92 |
| Main relief pressure | 330 kg/cm2 (4,689 psi) normal operation; 350 kg/cm2 (4,970 psi) with "Pressure Up" | p. 98 |
| Travel speed 20 m (66 ft), Standard Mode | High 16.0 ±1.0 sec; Low 25.0 ±1.5 sec | p. 98 |
| Swing (3 revolutions), Standard Mode | 17.6 ±1.5 sec | p. 98 |
| Swing relief valve | 270 kg/cm2 (3,840 psi) | p. 596 |
