Complete workshop & service manual with electrical wiring diagrams for Doosan DX480LC, DX520LC 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 DX480LC, DX520LC 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.

“K1008703E.pdf”
Doosan DX480LC, DX520LC Crawler Excavator Shop Manual
K1008703E; Serial Number 5001 and Up; 878 pages

TABLE OF CONTENTS
Safety
Track Excavator Safety ................ SP000142
Specifications
Specification for DX480LC/ 520LC......... SP000143
General Maintenance
General Maintenance Procedures ............ SP000016
Standard Torques................... SP000017
Upper Structure
Cabin ............ SP000018
Counterweight......................... SP000153
Fuel Tank............................ SP000155
Swing Bearing......................... SP000158
Swing Reduction Gear.................... SP000160
Lower Structure and Chassis
Track Assembly ...................... SP000171
Air Conditioner ........................ SP000025
Engine and Drive Train
Drive Coupling (Main Pump)............... SP000026
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment ........... SP000179
Accumulator............................ SP000028
Center Joint (Swivel)................... SP000181
Cylinders........... SP000193
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EXCERPT:
Single Operation
Travel Spool Shifting (Figure 3 and Figure 4)
1. When shifting travel spool by increasing pressure of travel (section 1) pilot port (Pb1 (Pa1)), oil supplied to port (P1) flows through neutral passage (L1), to spool, and flows to port (B1 (A1)). Return oil flows through port (A1 (B1)) to spool and returns to tank passage (Ta).
2. When shifting travel spool by increasing pressure of travel (section 6) pilot port (Pb6 (Pa6)), oil supplied to port (P2) flows through neutral passage (R1), and spool, to passage (S6-1) and flows to port (B6 (A6)). At this time poppet (S6-2) is not opened because parallel passage (R3) pressure equals passage pressure (S6-1). Return oil flows through port (A6 (b6)) to spool and returns to tank passage (Ta).
3. When shifting either spool (section 1 or 6), land (Lc4) or (Rc3) is closed. Oil supplied from port (PP) does not flow into tank passage, so that pressure at port (PT) rises.
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