Table 2: Evaluation of the lubricant condition.

ParameterCondition evaluation
GoodSatisfactoryUnsatisfactoryEmergency

CN—total impurities (CCT IR)1.7–2.0%2.0–2.5%Over 2.5%
WPC—amount of wear particlesTo 50%50–70%Over 70%
PLP—proportion of macroparticles on WPCTo 15%15–35%Over 35%
H2O—water content in oilTo 2% of the volumeOver 2% of the volume