Chutchman

Is there a way to lubricate the bearings in the alternator? My truck picked up a bit of a squeak in the alternator after a dusty run. It sounds to me like dry bearings.

Dirt Driver

I haven't had one apart, but they are most likely sealed bearings and would require disassembling the alternator to remove them. At the same time, if a sealed bearing goes dry and starts making noise, it's already gone and needs to be replaced.

fireman1559

hes right they are sealed and there are several small ones and the only way to get to them is if you take it out nad open the case and replaced them

UKMyers

Sure that's what the noise is? Dust on belts can cause annoying squeeks too. I'd try hitting your belts with a few quick shots of WD40 with the engine running and see if that cures it.

Kiroshu

Nobody really takes apart and fixes alternators anymore. I say you need to get a new one and save that for a back-up or the core charge on new one. How many miles does the alternator have. If you don't even know then replace it.

Red_Chili

Belt dressing (NAPA, CarQuest, etc.). Stay away from WD40 and belts.

iamsuperbleeder

yeah I was about to say, I don't know that I'd put a LUBRICANT on my belt That's the reason they make specific belt dressing; that stuff is sticky as all hell, lol

Ezrider_92356

you can rub an bar of soap on the belt

Red_Chili

Not to mention... WD40 has been known to do evil things to plastics and rubber. I think I'd stay away from it.