Komatsu PC210-10 DEMOLITION BASE SPEC., Operation & Maintenance Manual, Page: 346 / 458

MAINTENANCE SCHEDULE TABLE MAINTENANCE
4–36
CHECK GAS SPRING
CHECK GAS SPRING:PC220_KU-M180-280P00A
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WARNING
The gas spring is charged with high-pressure nitrogen gas, so wrong handling may cause an explosion,
which will lead to serious injury or damage. When handling, always do as follows.
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Do not disassemble.
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Do not bring it near flame nor dispose of it in fire.
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Do not make holes in it nor weld it.
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Do not hit it, roll it, nor give it any impact.
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When disposing, the gas must be released. Ask your Komatsu distributor for this work.
The gas springs are located at the engine hood (right, left: two places).
In the following cases, ask your Komatsu distributor for inspec-
tion, repair, and replacement.
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When the engine hood cannot be opened with light effort.
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When the engine hood do not stay open.
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When oil or gas is found to be leaking from the gas spring.
BLEED AIR FROM HYDRAULIC CIRCUIT
BLEED AIR FROM HYDRAULIC CIRCUIT:PC220_KU-C000-231P00A
See "STARTING ENGINE (3-163)". If necessary, see the paragraphs for starting the engine, and moving/steering/
stopping the machine in OPERATION section.
1. Bleeding air from pump
1) Loosen air bleeder (1) and check that oil oozes out from
the air bleeder.
2) If the oil does not ooze out, remove drain hose (2) from
the hydraulic pump case and fill the pump case com-
pletely with hydraulic oil through drain port.
Oil will come out when the drain hose is removed, so
secure the hose fitting at a position higher than the level
of the oil in the hydraulic tank.
3) After completing the air bleed operation, tighten air
bleeder (1) and install the drain hose.