Shop Manual
K1009096AE
Serial Number 5327 and Up
DX420LC
Doosan reserves the right to improve our products in a continuing process to provide the best possible
product to the market place. These improvements can be implemented at any time with no obligation to
change materials on previously sold products. It is recommended that consumers periodically contact their
distributors for recent documentation on purchased equipment.
This documentation may include attachments and optional equipment that is not available in your
machine's package. Please call your distributor for additional items that you may require.
Illustrations used throughout this manual are used only as a representation of the actual piece of
equipment, and may vary from the actual item.
K1009096AE Shop Manual
Copyright 2008 Doosan
1Table of Contents
Safety
Track Excavator Safety......................................................................... SP000907
Specifications
Specification for DX420LC.................................................................... SP001755
General Maintenance
General Maintenance Procedures ........................................................ SP000016
Standard Torques ................................................................................. SP000813
Upper Structure
Cabin .................................................................................................... SP001737
Counterweight....................................................................................... SP001756
Fuel Tank.............................................................................................. SP001757
Fuel Transfer Pump (Opt)..................................................................... SP000021
Swing Bearing....................................................................................... SP001856
Swing Reduction Gear.......................................................................... SP001740
Lower Structure and Chassis
Track Assembly .....................................................