## 3 Results
### Lubricant Condition Analysis in Gear Module G1  
This section presents the processing of the results for determining the lubricant condition or, in other words, the results of the analysis for determining the cleanliness class according to ISO 4406 for the first gear module, labeled G1, based on all seven measurements according to the periodicity described in the introduction to Section 3. The results are presented in Table 5. The graphical representation of this analysis is presented in Figure 7. \begin{table}
\begin{tabular}{l c c c c c c} \hline \hline \multirow{2}{*}{**Stage of Measurement Interval**} & \multicolumn{5}{c}{**ISO 4406**} \\ \cline{2-7}  & **\textgreater{4 μm**} & **Class** & **\textgreater{6 μm**} & **Class** & **\textgreater{14 μm**} & **Class** & **Final** \\  & **Part/1 mL** & **Class** & **Part/1 mL** & **Part/1 mL** & **Class** & **Class** \\ \hline New lubricating oil & 14,208 & 21 & 3413 & 19 & 78 & 13 & 21/19/13 \\ After 1 h of testing without filtration & 132,088 & 24 & 36,568 & 22 & 2703 & 19 & 24/22/19 \\ After 10 h of testing without filtration & 393,088 & 26 & 92,732 & 24 & 3662 & 19 & 26/24/19 \\ After 11 h of testing and 1 h of filtration & 277,427 & 25 & 63,464 & 23 & 2246 & 18 & 25/23/18 \\ After 4 weeks of testing and 4 h of filtration & 136,240 & 24 & 32,291 & 22 & 1132 & 17 & 24/22/17 \\ After 8 weeks of testing and 8 h of filtration & 73,600 & 23 & 18,626 & 21 & 490 & 16 & 23/21/16 \\ After 32 weeks of testing and 32 h of filtration & 3858 & 19 & 943 & 17 & 59 & 13 & 19/17/13 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Analysis of lubricant contamination in periodic intervals of gearbox module G1. Figure 6: Lubricant analysis from gear module G1 after the first hour of run-in. After 32 weeks of testing and 32 hours of filtration  
After 8 weeks of testing and 8 hours of filtration  
After 4 weeks of testing and 4 hours of filtration  
After 11 hours of testing and 1 hour of filtration  
After 10 hours of testing without filtration  
After 1 hour of testing without filtration  
New lubricating oil  
Table 6 presents the elemental analysis of the lubricant in gearbox module G1, conducted over individual periods of lubricant condition assessment. The graphical evaluation of elemental lubricant contamination for selected elements is shown in Figure 8. \begin{table}
\begin{tabular}{c c c c c c c} \hline \multirow{2}{*}{\
\begin{tabular}{c} **Chemical** \\ **Element** \\ \end{tabular} } & \multirow{2}{*}{
\begin{tabular}{c} **New** \\ **Lubricating** \\ **Oil** \\ \end{tabular} } & **After 1 h** & **After 11 h** & **After 4 Weeks** & **After 8 Weeks** & **After 32 Weeks** \\  & & **Without** & **and 1 h** & **and 4 h** & **and 8 h** & **and 32 h of** \\  & & **Filtration** & **of Filtration** & **of Filtration** & **of Filtration** & **Filtration** \\ \hline Ag & 0.01 & 0.03 & 0.03 & 0.02 & 0 & 0.02 \\ Al & 0.36 & 1.68 & 0.91 & 1.19 & 0.9 & 0.43 \\ B & 4.78 & 0.94 & 0.57 & 0.75 & 2.3 & 0.27 \\ Ba & 0.25 & 0.85 & 0.58 & 0.58 & 0.4 & 0.46 \\ Ca & 0.06 & 11.20 & 7.64 & 7.84 & 6.9 & 5.19 \\ Cd & 0.18 & 0.11 & 0.15 & 0.13 & 0 & 0.02 \\ Cr & 0.25 & 0.73 & 0.45 & 0.56 & 0.5 & 0.3 \\ Cu & 0 & 0.74 & 0.32 & 0.45 & 0.3 & 0.06 \\ Fe & 0.33 & 36.61 & 23.39 & 20.31 & 19.7 & 2.96 \\ K & 0.01 & 0.98 & 0.39 & 0.39 & 0.2 & 0.04 \\ Mg & 2.54 & 4.11 & 3.48 & 3.47 & 3.2 & 3.22 \\ Mn & 0.02 & 2.31 & 1.46 & 1.36 & 1.1 & 0.58 \\ Mo & 0.41 & 29.17 & 20.68 & 18.68 & 12.7 & 10.19 \\ Na & 0 & 6.52 & 3.21 & 3.12 & 1.7 & 0.85 \\ Ni & 0 & 1.0 & 0.06 & 0.45 & 0.9 & 0.04 \\ P & 1627.0 & 1434.0 & 1490.5 & 1433.5 & 1514.0 & 1407.0 \\ Pb & 0 & 0.20 & 0.39 & 0.12 & 0.3 & 0.18 \\ Sb & 1.9 & 4.08 & 3.21 & 2.98 & 2.6 & 8.01 \\ Si & 0.18 & 23.28 & 14.3 & 14.57 & 10.3 & 7.41 \\ Sn & 1.88 & 1.89 & 1.42 & 1.11 & 1.1 & 1.46 \\ Ti & 0.71 & 1.12 & 0.85 & 0.89 & 0.8 & 0.69 \\ V & 0.38 & 0.30 & 0.42 & 0.42 & 0.2 & 0.66 \\ Zn & 0 & 25.80 & 14.21 & 14.58 & 8.6 & 4.13 \\ \hline \end{tabular}
\end{table} 
Table 6: Elemental analysis of lubricant contamination across the monitoring periods of gearbox module G1.