Q1. What is the tooth combination?
Q2. Fluid film or rolling element bearings?
Q3. Is the casing a weldment or a casting?
Q4. What is the exact transducer being used?
Q5. I see 16 mm/sec2 as your highest level acceleration. I could have done the conversion incorrectly (I'm working from a tablet) but in making the conversion to g's I get the following. In comparison to API 613, the levels you have measured seem low.