JoeSpareBedroom wrote:

Whattya think of this:

I've got bearing buddies on my trailer, bought in 1999. My mechanic's a
boater, so during the trailer's NY inspection, he says "Let's jack it up &
listen to the bearings". I know he's not looking for extra work because he
refuses to work on trailers, except his own. His shop's a half mile into
some woods, nice & quiet. He spins the wheels, says "Listen - I don't hear a
thing. I wouldn't clean those bearings. Just keep adding grease when they
need it".

Good advice? Bad advice? Moderately good/bad advice?

I wouldn't buy it.

Visually inspecting the bearings is the only proper way to determine if
there is any damage to the races or bearing assembly themselves. In
particular after seven years.

You may have BB on the bearings, but that doesn't mean that they haven't
picked dust, dirt and other contaminants which hurt bearings. Over
time, even grease can't prevent heat buildup which can also damage
bearings. Also after seven years, the seals are probably worn which
just increases the chances of failure.