While conducting a walkaround of a wheel loader, you observe a shiny wet spot on the ground beneath the hydraulic hose connecting to the lift cylinder. Upon closer inspection, you notice a fine mist of hydraulic fluid escaping from a pinhole in the hose when the engine is running and the hydraulics are pressurized. What is the MOST appropriate course of action?

Question: While conducting a walkaround of a wheel loader, you observe a shiny wet spot on the ground beneath the hydraulic hose connecting to the lift cylinder. Upon closer inspection, you notice a fine mist of hydraulic fluid escaping from a pinhole in the hose when the engine is running and the hydraulics are pressurized. What is the MOST appropriate course of action?

Answer options:

• Place an absorbent pad to catch the fluid and continue operating, monitoring the leak.
• Inform your supervisor and continue working, as pinhole leaks typically don't fail suddenly. ✅ Immediately shut down the engine, tag out the machine, and report the critical defect to your supervisor for repair.
• Wrap the hose tightly with electrical tape to temporarily seal the pinhole and then proceed with operations.

Correct answer: Immediately shut down the engine, tag out the machine, and report the critical defect to your supervisor for repair.

Explanation: A pinhole leak in a pressurized hydraulic hose, even appearing as a mist, presents an extremely serious and immediate hazard: hydraulic injection injury. Fluid under high pressure can penetrate skin, leading to severe tissue damage, infection, and potential amputation. As per OH&S regulations, any equipment defect posing an immediate threat to life or limb must result in immediate shutdown, tag-out, and reporting for expert repair. Attempting to temporary fix it or continue operating is extremely dangerous.