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国際安全衛生センタートップ > 事例研究 > Cases of Accident-related Injuries
A high-pressure hose that had been loosened for replacement caused oil to spurt into a worker's face, injuring his eyes.

To replace the hydraulic hose of a rock crusher, the stop valve was shut to prevent oil from draining out. After the joint of the hydraulic hose had been loosened, the residual pressure in the circuit caused hydraulic oil to spurt into a worker's face, injuring his eyes.


Corrective Action
1. When disassembling high-pressure pipes, always remember to release residual pressure first.
2. When loosening joints, do so slowly while monitoring them carefully.
3. If a hose comes off and oil spurts out, the hydraulic cylinder or attachment could move. Thus, be sure to stabilize the front of the hydraulic machine before performing this kind of work.

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