Doosan DX300LC Crawler Excavator Factory Service & Shop Manual


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Complete workshop & service manual with electrical wiring diagrams for Doosan DX300LC 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 DX300LC 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.

“K1006408E – DX300LC Operation & Maintenance Manual.pdf”
“DX300 – Electrical Schematic.pdf”
“K1006409E – DX300LC Shop Manual.pdf”
“DX300 – Hydraulic Schematic.pdf”
Doosan DX300LC Crawler Excavator Shop Manual
K1006409E; Serial Number 5001 and Up; 818 pages

TABLE OF CONTENTS
Safety
Track Excavator Safety
Specifications
Specification for DX300LC
General Maintenance
General Maintenance Procedures
Standard Torques
Upper Structure
Cabin
Counterweight
Fuel Tank
Fuel Transfer Pump
Swing Bearing
Swing Reduction Gear
Lower Structure and Chassis
Track Assembly
Air Conditioner
Engine and Drive Train
Drive Coupling (Main Pump)
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment
Accumulator
Center Joint (Swivel)
Cylinders
Swing Motor
Travel Motor
Gear Pump
Main Control Valve
Hydraulic Schematic (DX300LC)
Axial Piston Pump
Remote Control Valve (Work Lever / Joystick)
Travel Control Valve (With Damper)
Electrical System
Electrical System
Electrical Schematic (DX300LC)
Attachments
Boom and Arm
Bucket

EXCERPT:
“Compound Operation”
“Travel Compound Operation”
“In the event of operating another function when the traveling left or right (when advancing, backing, or pivot turning) or operating for travel operation during the operation other than traveling, the oil supplied from the port (PP) is cut off from the tank passage (Ta) in the signal land part of the section other than the travel shifted from the land (Lc4), (Lc7), (Rc3), and (Rc5), and the pressure of the signal passage is increased to the relief set pressure of the oil origin for signal.”
“Due to the increase of the signal pressure, the spool before traveling is shifted to cause an increase of pressure in ports (PT and PA).”
“When the straight travel spool is shifted, the oil supplied from port (P1) flows to travel (section1) from neutral passage (L1) while oil supplied to port (P2) flows into travel (section 6) after passing through passage (2), straight travel spool head, and neutral passage (R1) flowing into the parallel passage (L3) after passing the straight travel spool head, and passage (1).”
“In the event that load pressure of section other than traveling is higher than the travel (Section 6) load pressure, some of the oil supplied from port (P2) pushes and opens poppet (S6-2), and it merged into the passage (S6-1) after passing the orifice of the poppet.”
“The operation is made by oil supplied from travel (Section 1 and”
“6) port (P1), and work device other than traveling is operated by the oil supplied from the port (P2), and projection is prevented”
“when operating with travel operation and other work device.”