Description

Doosan DX170W Excavator Service Manual

Doosan Excavator DX170W
Format: PDF
Language: English
Publication No: K1042891E
Serial Number: 5001 and Up

Doosan DX170W Excavator Service Manual – 1275 Pages

How to Use The Doosan DX170W Excavator Guide Manual:

This manual provides information for servicing the DX170W Doosan 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 Doosan DX170W Excavator 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.

DOOSAN DX170W Instruction Table of Content:

Safety
Wheel Excavator Safety …………………………………………………………….. SP002195
Specifications
Specification for DX170W…………………………………………………………… SP001864
General Maintenance
General Maintenance Procedures……………………………………………….. SP000016
Standard Torques……………………………………………………………………… SP000813
Upper Structure
Cabin (Non-ROPS) ……………………………………………………………………. SP002194
Cabin (ROPS)…………………………………………………………………………… SP002191
Counterweight…………………………………………………………………………… SP001866
Fuel Tank…………………………………………………………………………………. SP001867
Fuel Transfer Pump…………………………………………………………………… SP001868
Swing Bearing…………………………………………………………………………… SP001869
Swing Reduction Gear……………………………………………………………….. SP000921
Lower Structure and Chassis
Ram Lock Valve………………………………………………………………………… SP000923
Selector Valve…………………………………………………………………………… SP000926
Double Pilot Check Valve …………………………………………………………… SP000927
Solenoid Valve………………………………………………………………………….. SP000928
Front Axle ………………………………………………………………………………… SP000929
Rear Axle …………………………………………………………………………………. SP000930
Engine and Drivetrain
Transmission ……………………………………………………………………………. SP000962
Drive Coupling (Main Pump)……………………………………………………….. SP000963
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment …………… SP002229
Accumulator……………………………………………………………………………… SP000984
Center Joint (Swivel)………………………………………………………………….. SP000919
Cylinders………………………………………………………………………………….. SP001870
Main Control Valve ……………………………………………………………………. SP001990
Swing Motor……………………………………………………………………………… SP001871
Travel Motor……………………………………………………………………………… SP001872
Counterbalance Valve ……………………………………………………………….. SP000991
Main Pump & PTO…………………………………………………………………….. SP001873
Gear Pump ………………………………………………………………………………. SP000989
Service Brake Supply Valve ……………………………………………………….. SP000990
Dozer Control Valve…………………………………………………………………… SP000992
Steering Valve ………………………………………………………………………….. SP000993
Accelerator Pedal Valve (Hydraulic) …………………………………………….. SP001515
Remote Control Valve (Work Lever / Joystick) ………………………………. SP000189
Breaker EPPR Valve (Opt) …………………………………………………………. SP001874
Service Brake Pedal Valve …………………………………………………………. SP001006
Solenoid Valve Assembly …………………………………………………………… SP000997
Hydraulic Schematic (DX170W) ………………………………………………….. SP001875

Electrical System
Electrical System (Non-ROPS)……………………………………………………. SP002212
Electrical System (ROPS)…………………………………………………………… SP002213
Electrical Schematic DX140W/160W/170W/190W/210W ……………….. SP002201
Attachments
Boom and Arm………………………………………………………………………….. SP001876
Bucket……………………………………………………………………………………… SP001001

Doosan DX170W Manual Instruction Extract:

Detailed Functions and Application of Brake Supply Valve Assembly Package
1. Prevents overload on brake pump saving energy.
The pressure and oil flows discharged by the brake pump is supplied to the brake control device through valves. As the engine revolution (RPM) of the vehicle goes up, the revolution of the brake pump goes up increasing the amount of pressure and oil discharge. This valve package prevents energy loss by reducing loss in sources of power and fluid energy.

In case the pressure of the brake control system exceeds the set pressure value of the Unloading Valve (QPABLAN: C6), the pilot spool in the Unloading Valve is operated to bypass oil flows on the drain line of the Logic Valve (LRDA-XDN:C1) to the “T” line. This releases the spool in the Logic Valve to bypass the pressure and oil discharged by the pump to the tank, allowing the pump to move under no load.

If the pressure value of the brake control system goes below a set pressure value, the pilot spool of the Unloading Valve closes. This will make the drain line have oil flows and the spool in the Logic valve closes. Then, the pressure and oil flows discharged by the pump are supplied into the brake control device.
Cut-out is when the pressure and oil flows discharged by the pump are bypassed, and cut-in is when they are supplied to the brake control device.