Research and Correlation of Diagnostic Methods for Assessment of the State of Oil Filling in Cycloid Gearbox

Table 2

Evaluation of the lubricant condition.

Parameter	Condition evaluation
	Good	Satisfactory	Unsatisfactory	Emergency
CN—total impurities (CCT IR)	—	1.7–2.0%	2.0–2.5%	Over 2.5%
WPC—amount of wear particles	—	To 50%	50–70%	Over 70%
PLP—proportion of macroparticles on WPC	—	To 15%	15–35%	Over 35%
H2O—water content in oil	—	To 2% of the volume	Over 2% of the volume	—