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Grease Color: A First Clue, Not a Final Verdict for Bearing Health Can you truly tell if your bearings are healthy just by looking at the color of their grease? Not definitively, but it's a valuable starting point! While a new grease's color is often just a dye for identification, any significant change in its appearance can be a red flag. Darkening might suggest oxidation or contamination from wear particles, while a milky look often points to water ingress. Losing its original vibrancy can signal thermal degradation. However, relying solely on visual inspection is like diagnosing a car engine just by the color of its exhaust – it gives you a clue, but not the full picture. Many issues aren't visible, and some greases change color naturally with use. For a true assessment of your bearing's health, you need more robust methods. Think of grease color as your early warning system, prompting further investigation with methods like laboratory grease analysis, vibration analysis, or temperature monitoring.
