During a routine filter inspection on a hydraulic system of a large material handler, the technician observes significant dark, metallic particles on the magnetic plug of the hydraulic filter housing. What immediate action should the technician prioritize?

Question: During a routine filter inspection on a hydraulic system of a large material handler, the technician observes significant dark, metallic particles on the magnetic plug of the hydraulic filter housing. What immediate action should the technician prioritize?

Answer options:

• Replace the hydraulic fluid and filter, then continue operation. ✅ Immediately shut down the machine and investigate the hydraulic system for internal component failure.
• Collect a hydraulic fluid sample for analysis and schedule a follow-up inspection.
• Clean the magnetic plug and monitor the system during the next shift.

Correct answer: Immediately shut down the machine and investigate the hydraulic system for internal component failure.

Explanation: Significant metallic particles on a magnetic plug indicate severe internal wear or failure within the hydraulic system, such as a pump, motor, or cylinder. Continuing operation risks catastrophic failure and further damage. Immediate investigation is required.