Proactive Maintenance Strategies Flashcards

Which ISO standard provides fluid cleanliness codes commonly used as targets in contamination control?

Answer: ISO 4406

ISO 4406 codes particle counts in hydraulic and lube oil and is used to set cleanliness targets.

A plant raises its lubricant cleanliness target and achieves it. What reliability outcome is most expected?

Answer: Longer component life for bearings and hydraulics

Cleaner oil reduces abrasive wear, which significantly extends component life.

Why is engaging the supply chain in reliability specifications considered proactive?

Answer: It prevents defects from arriving with new parts and equipment

Reliability-based purchasing specs keep defective or low-quality items from entering the plant.

A belt drive repeatedly fails due to sheave misalignment. What is the most proactive fix?

Answer: Use a laser sheave alignment tool and set correct belt tension at installation

Correct sheave alignment and tension eliminate the cause of premature belt and bearing wear.

What is the main reason to track mean time between failures (MTBF) after a defect elimination project?

Answer: To verify that the fix actually reduced failure frequency

Rising MTBF after the change confirms that the root cause was eliminated.

Which situation best justifies a run-to-failure decision within a proactive strategy?

Answer: A low-cost, non-critical item whose failure has minimal consequences

Run-to-failure is acceptable when failure consequences are low and prevention costs more than the loss.

How does a culture of reliability support sustained proactive maintenance?

Answer: Everyone owns asset condition and acts to prevent defects

Proactive practices last when operators, maintenance, and leaders all share responsibility for eliminating defects.