Riding mower problems

I'm down and my wife changed the blades but they wernt that bad I was in the house telling her what to do on face time...She did a real good job.Took her as fast as I'd do it.Got another noise I got her to look at the middle blade, I havent ever dropped the deck to grease that one,she said the tower was solid ....I didnt want her to drop the deck cause I've never done it ....I'll have to call a mobile repairman out ....when ur down u find our who your friends are