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Accumulator
The pilot control system is equipped with an accumulator. For a
brief period of time after the engine has been shut down, the
accumulator will store a pressure charge that may enable
hydraulic controls to be activated. Activation of any controls may
enable the selected function to operate under force of gravity.
When performing maintenance on the pilot control system, the
hydraulic pressure in the system must be released as described
in "Handling of Accumulator" in the Operation and Maintenance
Manual.
The accumulator is charged with high-pressure nitrogen gas, so
it is extremely dangerous if it is handled in the wrong way.
Always observe the following precautions:
•
Do not drill or make any holes in the accumulator or
expose it to any flames, fire or heat source.
•
Do not weld on the accumulator, or try attaching anything
to it.
•
When carrying out disassembly or maintenance of the
accumulator, or when disposing of the accumulator, the
charged gas must be properly released. Contact your
DOOSAN distributor.
•
Wear safety goggles and protective gloves when working on an
accumulator. Hydraulic oil under pressure can penetrate
the skin and cause serious injuries.
Indoor Ventilation
Engine exhaust gases can cause fatal accidents, and
unconsciousness, loss of alertness, judgment and motor control
and serious injury.
Make sure there is adequate ventilation before starting the
engine in any enclosed area.
You should also be aware of open windows, doors or ductwork
where exhaust may be carried, or blown by the wind, exposing
others to danger.
Track Excavator Safety
Page 20
Figure 11
ARO1770L
SP002984
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