6-39
10. ACCUMULATOR
The accumulator is installed at the safety
valve. When the boom is left the raised
position, and the control levers are operated
with the engine stopped the pressure of the
compressed nitrogen gas inside the
accumulator sends pilot pressure to the
control valve to actuate it and allow the boom
and bucket to come down under their own
weight.
Type of gas
Nitrogen gas (N
2
)
Volume of gas
0.75
ℓ
(0.2 U.S.gal)
Charging pressure of gas 16 kg/cm
2
(228 psi)
Max actuating pressure 128 kg/m
2
(1820 psi)
1
2
3
1 Diaphragm
2 Steel pressure vessel
3 Closure button
7803AWE56
Содержание HL955
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