Doosan DL420A Install guide

Original InstructionsCopyright DOOSAN 2012
Serial Number 10001 and Up
Shop Manual
DL420A Wheel Loader
950106-00817E
June 2012
DOOSAN and the DOOSAN logo are registered
trademarks of DOOSAN Corporation in the United
States and various other countries around the
world.

Table of Contents
Page I
1Table of Contents
Safety
Wheel Loader Safety............................................................................ SP002667
Specifications
Specification for DL420A...................................................................... SP002704
General Maintenance
General Maintenance Instructions........................................................ SP002454
Standard Torques................................................................................. SP002404
Drivetrain
Transmission and Torque Converter....................................................SP002705
Transmission Error Codes (ZF)............................................................ SP002673
Front Axle (ZF-MT-L 3105 II)................................................................ SP002402
Rear Axle (ZF-MT-L 3095 II)................................................................. SP002474
Driveshaft..............................................................................................SP002674
Brake
Service Brake .......................................................................................SP002727
Brake Supply Valve .............................................................................. SP002728
Parking Brake.......................................................................................SP002729
Brake Pedal Valve................................................................................SP000123
Accumulator.......................................................................................... SP002677
Steering
Power Steering System........................................................................ SP002730
Steering Unit......................................................................................... SP002731
Flow Amplifier.......................................................................................SP002434
Emergency Steering............................................................................. SP002018

Table of Contents
Page II
Frame
Articulation Center................................................................................SP002467
Counterweight.......................................................................................SP000130
Tank
Oil Tank ................................................................................................ SP002732
Fuel Tank..............................................................................................SP002733
Hydraulics
Cylinders............................................................................................... SP001027
Main Pump............................................................................................ SP002734
Main Control Valve ............................................................................... SP002735
Load Isolation System .......................................................................... SP002736
Fan Drive Hydraulic Motor.................................................................... SP002737
Unloader Valve..................................................................................... SP002738
Pilot System.......................................................................................... SP002739
Hydraulic Schematic DL420A............................................................... SP002740
Electrical System
Air Conditioner...................................................................................... SP000172
Electrical System.................................................................................. SP002712
Electrical Schematic (DL420A)............................................................. SP002742

1Safety

SP002667
Page 1
Wheel Loader Safety
SP002667
WHEEL LOADER SAFETYSP002667
Wheel Loader
Safety
Edition 1

SP002667
Wheel Loader Safety
Page 2
MEMO

SP002667
Page 3
Wheel Loader Safety
Table of Contents
Wheel Loader Safety
Safety Instructions................................................5
Applicable Models ................................................5
Safety Messages..................................................6
Safety Decals .......................................................7
General.................................................................7
Transportation ....................................................17
Operation............................................................19
Maintenance.......................................................37
Environment and Circumstances........................52

SP002667
Wheel Loader Safety
Page 4
MEMO