Copyright Doosan 2009
950106-00008E Operation and Maintenance Manual
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.
Operation and Maintenance Manual
Serial Number 5001 and Up
The machine is intended to be used under normal conditions
for the applications described in the Operator's Manual. If it
is used for other purposes or in potentially dangerous
environments, for example explosive atmosphere or areas
with dust containing asbestos, etc., special safety regulations
must be followed and the machine must be equipped for
such use. Contact the manufacturer/dealer for further
The machine is designed for a maximum machine weight
(includes equipment and attachments) of 22,300 kg
(49,163 lb) for DL420. If the maximum weight is exceeded,
no warranties on the part of the manufacturer will apply.
However, always pay attention to national regulations for
traveling on public roads.
DL420 has a Cummins QSM11 10.8 liter engine. The engine
has intercooling and is fitted with common rail system. The
common rail system is positioned at an angle above the
pistons and are controlled via the camshaft and a electronic
control module (ECM).
The cylinder head covers all cylinders.
The engine has four valves per c