What causes 'milky' hydraulic fluid in a crane reservoir?
Milky hydraulic fluid indicates water contamination, typically from seal leaks, condensation, or external moisture entry into the system.
Milky or cloudy hydraulic fluid occurs when water mixes with the oil, creating an emulsion. The most common causes include worn cylinder seals allowing moisture penetration, damaged reservoir breathers permitting rain or humidity entry, and temperature fluctuations creating condensation inside the tank. Cooler lines and fittings can also develop leaks that allow water ingress.
Remember: "MILK = Moisture In Leaky Kinetics" (water contamination from seals, condensation, or external entry)
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