## 3 Results
### Lubricant Condition Analysis in Gear Module G3  
Table 7 and, subsequently, Figure 9 present the results of the analysis examining the progression of lubricant contamination in gearbox module G3 during load bench testing with additional lubricant filtration. \begin{table}
\begin{tabular}{l c c c c c c} \hline \hline \multirow{2}{*}{**Stage of Measurement Interval**} & \multicolumn{6}{c}{**ISO 4406**} \\ \cline{2-7}  & **>4 \(\mu\)m** & **Class** & **>6 \(\mu\)m** & **Class** & **>14 \(\mu\)m** & **Class** & **Final Class** \\  & **Part/1 mL** & & **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 & 33,504 & 22 & 30,250 & 22 & 4711 & 19 & 22/22/19 \\ without filtration & 79,123 & 27 & 232,354 & 25 & 8694 & 20 & 27/25/20 \\ After 11 h of testing & 603,400 & 26 & 186,233 & 25 & 5292 & 20 & 26/25/20 \\ and 1 h of filtration & 354,996 & 26 & 98,319 & 24 & 2486 & 18 & 26/24/18 \\ After 8 weeks of testing & 251,234 & 25 & 63,319 & 23 & 1414 & 18 & 25/23/18 \\ and 8 h of filtration & 50,560 & 23 & 12,583 & 21 & 568 & 16 & 23/21/16 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Analysis of lubricant contamination in periodic intervals of gearbox module G3. Figure 8: Elemental analysis of lubricant contamination for selected elements during the operational periods of gearbox module G1. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Chemical Element**} & \multirow{2}{*}{\begin{tabular}{c} **New** \\ **Lubricating** \\ **Oil** \\ \end{tabular} } & \begin{tabular}{c} **After 1 h** \\ **Without** \\ **Filtration** \\ \end{tabular} & \begin{tabular}{c} **After 1 h** \\ **and 1 h** \\ **of Filtration** \\ \end{tabular} & \begin{tabular}{c} **After 4 Weeks** \\ **and 4 h** \\ **of Filtration** \\ \end{tabular} & \
\begin{tabular}{c} **After 8 Weeks** \\ **and 8 h** \\ **of Filtration** \\ \end{tabular} &
\begin{tabular}{c} **After 32 Weeks** \\ **and 32 h of** \\ **Filtration** \\ \end{tabular} \\ \hline Ag & 0.01 & 0.03 & 0.01 & 0.02 & 0.02 & 0.04 \\ Al & 0.36 & 0.86 & 0.62 & 0.63 & 0.63 & 0.46 \\ B & 4.78 & 0.73 & 0.65 & 0.69 & 0.58 & 0.34 \\ Ba & 0.25 & 0.50 & 0.39 & 0.47 & 0.36 & 0.44 \\ Ca & 0.06 & 9.92 & 9.43 & 9.49 & 6.13 & 6.61 \\ Cd & 0.18 & 0.11 & 0.08 & 0.05 & 0.10 & 0.05 \\ Cr & 0.25 & 0.49 & 0.51 & 0.49 & 0.42 & 0.23 \\ Cu & 0 & 0.11 & 0.09 & 0.14 & 0.10 & 0.04 \\ Fe & 0.33 & 19.60 & 14.65 & 14.99 & 14.50 & 2.63 \\ K & 0.01 & 0.18 & 0.15 & 0.12 & 0.09 & 0 \\ Mg & 2.54 & 3.12 & 3.14 & 3.16 & 3.01 & 3.33 \\ Mn & 0.02 & 0.82 & 0.70 & 0.81 & 0.56 & 0.45 \\ Mo & 0.41 & 13.89 & 12.89 & 12.32 & 8.22 & 8.24 \\ Na & 0 & 0.80 & 1.09 & 1.25 & 0.75 & 0.17 \\ Ni & 0 & 0.59 & 0.54 & 0.48 & 0.55 & 0.02 \\ P & 1627.0 & 1477.0 & 1473.50 & 1483.0 & 1502.5 & 1384.5 \\ Pb & 0 & 0.32 & 0.49 & 0.73 & 0.02 & 0.53 \\ Sb & 1.9 & 7.72 & 6.15 & 3.95 & 5.25 & 8.78 \\ Si & 0.18 & 19.40 & 12.66 & 12.64 & 8.90 & 8.20 \\ Sn & 1.88 & 0.59 & 0.69 & 1.7 & 0.78 & 1.05 \\ Ti & 0.71 & 1.19 & 1.30 & 1.27 &.116 & 0.71 \\ V & 0.38 & 0.43 & 0.26 & 0.42 & 0.32 & 0.50 \\ Zn & 0 & 6.4 & 4.65 & 4.55 & 4.89 & 3.04 \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Elemental analysis of lubricant contamination across the monitoring periods of gearbox module G3. Figure 9: Graphical representation of lubricant contamination in samples from gearbox module G3. Based on the lubricant analysis of the G3 gearbox module, after 32 weeks of testing and filtration, the lubricant cleanliness level was found to be worse than the cleanliness observed after just one hour of load testing. This may be related to a more than 2000% increase in lubricant contamination observed during the initial phase (10 h) of load testing. Such a significant rise can be attributed to several potential causes. Particles present in the contaminated lubricant can cause microscopic damage to gear teeth surfaces and bearings, leading to accelerated wear and the potential generation of additional debris.