Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual

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DETAILED CONTROLS AND GAUGES
OPERATION
3-148
ACCUMULATOR 3
WARNING
The accumulator is charged with high-pressure nitrogen gas, improper operation may cause an explosion
which could lead to serious injury or damage. When handling the accumulator, always do as follows:
Pressure in the control circuit cannot be completely removed. When removing the hydraulic equipment,
do not stand in the direction that oil spurts out when performing the operation.
Loosen the bolts slowly.
Do not disassemble the accumulator.
Do not bring it near flame or dispose of it in fire.
Do not make holes in it or weld it.
Do not hit it, roll it, or subject it to any impact.
When disposing of the accumulator, the gas must be released. Contact your Komatsu distributor for
proper disposal.
This machine is equipped with an accumulator in the control circuit. The accumulator is a device to store oil pres-
sure for the control circuit. Because an accumulator is installed, the control circuit can be actuated for a short time
even after the engine is stopped. As a result, if the control lever is moved in the LOWER direction, the work equip-
ment will go down under its own weight.
An accumulator is provided at Position A, B and C in the figure
at right.
A: Accumulator for cushioning the front idler
B: Accumulator for hydraulic control circuit
C: Accumulator for oil cooler circuit
q
Accumulator for cushioning the front idler
There is one inside the track frame.
q
Accumulator for hydraulic control circuit
There is one inside the cab base room.