When the l/o neutralization number exceeds which value is it required to change the l/o in the main pump?

The requirement to change the lube oil in the main pump when the l/o neutralization number exceeds a specific value is based on maintaining the integrity and performance of the lubrication system. A neutralization number indicates the oil's ability to neutralize acids, which can result from the breakdown of the oil or contaminants.

When the neutralization number exceeds 0.050, it's an indication that the oil is becoming acidic and may cause corrosion or damage to engine components if not addressed. Changing the l/o at this threshold helps ensure that the lubrication system remains effective and protects the machinery from potential harm due to acidic byproducts.

In this context, maintaining the l/o's neutralization number below 0.050 is key to preventing excessive wear and prolonging the life of the equipment. This standard is part of best practices in lubrication management for marine and industrial applications, emphasizing preventive maintenance to avoid costly repairs and downtime.