pinion/girth gear wear

alignment?

The tooth flank surfaces might have lost the initial hardened layer and the metal surfaces became softer and are wearing faster. Look at marks of progressive wear such as scratches or pitting.
Corrective action: Nanocoat them, apply a new protective layer such as the Rewitec www.rewitec.us to stop that wear process.
Best practice: Document the condition for future controls and to understand how it evolves.

WOULD YOU LIKE HELP WITH A AUTOMATIC LUBRICANT APPLICATOR FOR SYNTHETIC OPEN GEAR LUBE?

The best way in finding the probable cause of the problem on your equipment is to do the vibration test, audio test, thermal test, etc and for confirmation of the abnormalities found do the oil analysis to verify the severity of the equipment problem