Operation and maintenance manual

DX140R/DX140LCRInspection, Maintenance and Adjustment
4-78
HANDLING OF ACCUMULATOR
Release pilot accumulator pressure using the following
procedure:
1. Park machine on firm and level ground. Lower the front
attachme
nt to the ground and stop engine.
2. Move safety lever to "RELEASED" position.
3. Turn starter switch to "I" (ON) position.
4.
Fully stroke work and travel levers in all directions.
5. Move safety lever to "LOCK" position.
6. Turn key to "O" (OFF) position and remove from starter
s
witch.
7.
Remove accumulator by unscrew
ing it slowly.
WARNING
AVOID DEATH OR SERIOUS INJURY
Even though the engine is stopped, the hydraulic
accumulat
ors for the pilot system are still charged. Do not
disconnect any pilot system hoses until accumulator
pressure has been released from the circuit. To release
pressure, turn the starter switch to "I" (ON) position and
operate all hydraulic control levers and forward/reverse
travel levers. Even though the engine is shutdown hydraulic
actuated components may move while releasing pilot
pressure. Keep all personnel away from excavator while
performing this operation.
• Move safety lever to "LOCK" position after stopping
engine
.
•
DO NOT mishandle accumulator(s). They are very
dangerou
s because they contain high-pressure
nitrogen gas.
• DO NOT punch a hole or apply heat or fire to an
accumulat
or.
• DO NOT weld on accumulator, or try attaching
anyt
hing to it.
• When replacing an accumulator, contact a DOOSAN
distri
butor or sales agency so the gas can be properly
released.
• Wear safety goggles and protective gloves when
working on a
n accumulator. Hydraulic oil under
pressure can penetrate the skin and cause serious
injuries.
FG014444
Figure 126