Advanced passenger train (Prototype) gearboxes. Monitoring of lubricating oil quality, including wear debris (TM-GLA-9)

During the APT-P commissioning trials, regular gearbox oil condition monitoring was carried out for a 16 month period, in an attempt to resolve the problem of frequent gearbox failure. In addition to the standard oil test procedure (physical testing and spectrographic analysis), ferrographic analysis was also...