I have a 8MR2050FA alternator on each of my Volvo TAMD41B marine diesel engines. One of them has started making loud screeching noises the last two trips out. I thought I fixed it by tightening the mounting bolts. No luck. The belts are tightened correctly. They are not slipping.
Now, I´m beginning to think a bearing might be going out. Could this be a correct assumption?
Anyway to confirm my suspicions other than pulling it and taking it to a shop? It appears to be charging. It does charge the house bank so it might be working much harder than the other one.