Doosan DX490LC-3 and DX530LC-3 Excavator Service Manual Workshop Guide

Manual Included: Shop Manual: 1992 Pages Specifications: Brand: Doosan Model: DX490LC-3, DX530LC-3 Serial Number: 10001 and Up Type: Excavator Manuals: Shop Manual Publication Numbers: 950106-00259E (May 2012) Language: English Format: PDF Description Table of Contents Safety Track Excavator Maintenance Safety …………………………………………… SP002618 Specifications Specification for DX490LC-3/DX530LC-3……………………………………… SP002557 General Maintenance General Maintenance Instructions……………………………………………….. SP002454 Standard Torques……………………………………………………………………… SP002404 Upper Structure Cabin ………………………………………………………………………………………. SP002324 Counterweight…………………………………………………………………………… SP002558 Fuel Tank…………………………………………………………………………………. SP002559 Fuel Transfer Pump (Option) ………………………………………………………. SP002560 Swing Bearing…………………………………………………………………………… SP002329 Lower Structure and Chassis Track Assembly ………………………………………………………………………… SP002561 Engine and Drivetrain Engine……………………………………………………………………………………… SP002540 Engine Coolant Heater (Option) ………………………………………………….. SP002328 Drive Coupling (Main Pump)……………………………………………………….. SP002562 Hydraulics Hydraulic System Troubleshooting, Testing and Adjustment …………… SP002563 Accumulator……………………………………………………………………………… SP002455 Center Joint (Swivel)………………………………………………………………….. SP002545 Cylinders………………………………………………………………………………….. SP002564 Swing Device……………………………………………………………………………. SP002565 Travel Device……………………………………………………………………………. SP002566 Main Pump……………………………………………………………………………….. SP002567 Gear Pump ………………………………………………………………………………. SP002568 Main Control Valve ……………………………………………………………………. SP002569 Fan Motor for Oil Cooler …………………………………………………………….. SP002576 Fan Motor for Radiator……………………………………………………………….. SP002577 Fan Pump ………………………………………………………………………………… SP002583 Remote Control Valve (Work Lever / Joystick) ………………………………. SP002578 Travel Control Valve (with Damper)……………………………………………… SP002381 Solenoid Valve Assembly …………………………………………………………… SP002406 Breaker EPPR Valve (Option) …………………………………………………….. SP002458 Hydraulic Schematic………………………………………………………………….. SP002570 Electrical System Electrical System ………………………………………………………………………. SP002571 Electrical Schematic ………………………………………………………………….. SP002572 Attachments Boom and Arm………………………………………………………………………….. SP002573 Bucket……………………………………………………………………………………… SP002574 How to Use The Guide Manual This manual provides information for servicing the Excavator. All service procedures are broken down into detailed steps, listed in their recommended sequence. The manual uses both photographs and drawings to help locate and itemize components. The table of Contents on the preceding pages is your best tool for finding the service procedure you need. Be certain to observe all Safety information included in these pages. A schematic of each of the major engine systems is provided at the beginning of the section of the manual devoted to troubleshooting and repairing that particular system. Basic safety precautions are list in the Safety section of the Service Manual. Additional safety precautions are list in the Safety section of the owner/operation/maintenance publication. Specific safety warnings for all these publications are provided in the description of operations where hazards exist. WARNING labels have also been put on the product to provide instructions and to identify specific hazards. Instruction Extracts IAT and MAF Sensors The IAT and MAF sensors are installed on the intake duct. The IAT sensor detects the intake air temperature, and the MAF sensor detects the intake airflow amount. In the IAT sensor, the thermistor changes the resistance value according to temperature changes. The resistance characteristics are comprised of a low resistance value when the intake air temperature is high and a high resistance value when the intake air temperature is low. The ECM applies 5 V to the IAT sensor through the pull-up resistor and calculates the intake air temperature from changes in the voltage. This value is used in various control mechanisms, such as fuel injection control. The MAF sensor detects the intake airflow amount that is sent to the engine. Based on this information from the MAF sensor, the ECM monitors the operation conditions of the engine to calculate the fuel supply. The ECM recognizes information such as a large amount of air entry indicating acceleration or high-load state, and a small amount of air entry indicating deceleration or an idling state. Intake Throttle Valve The intake throttle valve is installed on the intake duct. It is driven by the intake throttle motor, and the intake throttle position sensor detects the valve position. Since the intake throttle valve raises the engine exhaust temperature during DPD regeneration, it controls the intake air amount.