OP000753
1-21
Safety
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 describe
in “Handling of Accumulator” on page 4-74.
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 any flame, 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.
Engine Ventilation
Engine exhaust gases can cause loss of judgment, loss of
alertness, and loss of motor control. These gases can also
cause unconsciousness, serious injury, fatal accidents and
death.
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
into which exhaust may be carried, or blown by the wind,
exposing others to danger.
ARO1770L
Figure 12
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