French to English Tech/Engineering Engineering (general) turboalternator

I have looked this term up in both Proz and GDT but it is one of those technical terms that can have so many different translations that I don't feel confident with it at the moment. It appears in a contract that is mostly of a non-technical nature but which has just turned a bit technical on me...and I am not confident with the parts of this device. Having said this, the contract does not go into great technical detail, all I know at the moment is that it is a turboalternator used in waste-to-energy operations. I am in the process of researching these devices (including requesting more info from the client) but in the meantime wondered if anyone might have an idea of what this part is likely to be in terms of this type of device. It appears simply in a schedule of parts to be inspected during a 'minor' inspection of the device 3 years after it was supplied. To give some surrounding context, this term appears in the following list (and one or two of the other terms in it might appear as separate questions, although I am fine with most of them) - thanks :-

Inspection de l’obturateur de protection
- Inspection des soupapes réglantes
- Inspection des paliers de la turbine
visite des ***coussinets****, de la butée, et des étanchéités
contrôle de l'instrumentation
- Inspection du réducteur
visite des coussinets et des étanchéités
contrôle visuel de la denture
contrôle de l'instrumentation
- Inspection de l’alternateur
visite des coussinets et des étanchéités
contrôle de l'instrumentation
contrôle des connections
contrôle des valeurs de résistance et d'isolement
- Contrôle du lignage
ligne d’arbre GV : turbine / réducteur
ligne d’arbre PV : réducteur / alternateur
contrôle visuel des accouplements
- Vérification des auxiliaires
contrôle visuel d'aspect général
contrôle visuel de l'étanchéité des circuits
contrôle visuel des connections
essai fonctionnel des pompes secours et ultime secours