OP000530
Inspection, Maintenance and Adjustment
4-84
HANDLING OF ACCUMULATOR
Pilot Accumulator
Release pilot accumulator pressure using the following
procedure;
1.
Position the machine on firm, level ground. Lower the front
attachment to the ground and shut down engine.
2.
Set safety lever and stand on "RELEASED" position.
3.
Turn starter switch to the "I" (ON) position.
4.
Fully stroke work in all directions.
5.
Set safety lever and stand on "LOCK" position.
6.
Turn key to "O" (OFF) position and remove from starter
switch.
7.
Remove accumulator by unscrewing it slowly.
WARNING!
Even though the engine or pump is stopped, the hydraulic
accumulators for the pilot and brake system are still
charged. Do not disconnect any pilot and brake system
hoses until accumulator pressure has been released from
the circuit. To release pressure, turn the starter switch to
the "I" (ON) position and operate all hydraulic control levers
and press the service brake pedal. Even though the engine
is shutdown hydraulic actuated components may move
while releasing pilot pressure and emergency brake is
applied during pressing service brake pedal. Keep all
personnel away from excavator while performing this
operation.
•
Set safety lever and stand on "LOCK" position
after stopping engine.
•
DO NOT mishandle accumulator(s). They are very
dangerous because they contain high-pressure
nitrogen gas.
•
DO NOT punch a hole or apply heat or fire to an
accumulator.
•
DO NOT weld on accumulator, or try attaching
anything to it.
•
When replacing an accumulator, contact a
DOOSAN
distributor or sales agency so the gas
can be properly released.
•
Wear safety goggles and protective gloves when
working on an accumulator. Hydraulic oil under
pressure can penetrate the skin and cause
serious injuries.
FG006781
Figure 153
Summary of Contents for DX190W
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Page 71: ...OP000528 2 3 Operating Controls ...
Page 128: ...OP000528 Operating Controls 2 60 CD Player Optional AST DIR FG000109 Figure 135 ...
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Page 292: ...OP000530 Inspection Maintenance and Adjustment 4 96 ...
Page 304: ...OP000440 6 8 Troubleshooting ...