Doosan A2300 Service Manual page 226

A Series Diesel Engine
Disconnect all electrical connections. Put tags on the
connections to identify their locations.
Disconnect all lines including fuel lines to the lift pump
and fuel return. Use tags to identify the lines.
Put a cover or tape over all engine openings.
Use the lifting eyes to lift the engine. Apply tension to
the hoist to hold the engine while you disconnect the
engine mounts from the chassis.
Lift the engine from the equipment.
Dry Engine Weight: 169 kg
Note : Remove all accessories and brackets not
previously removed to use with the
replacement engine.
224 Engine Replacement and Testing