alternator

ZZ is the only approved bearing for 19 years running and way beyond

I had a carton of USSR bearings that spun rough. Then there was Poland bearings which were trouble-free, then green seal SKF, and finally NTN.

MEXICOWANDERER wrote:
ZZ is the only approved bearing for 19 years running and way beyond.

But you also say: "he suffix for metal shielded and not plastic sealed bearings is ZZ. ZZ bearings are definitely not suitable for alternators because of metal and graphite contamination."

Those statements seem contradictory. Can you clarify?

Victory Lap FDA-04 repair kit,20 bucks,has bearings,brushes.This started with an alarming belt squeak.Thought I had it figured out...3 times! First,AC clutch bearing,no help,idler and tensioner,still squeaking,new belt,nope.Really sounded like the alternator but looked pretty good when apart.I don't know.Will get it done today but don't have a lot of confidence.

Yep you are absolutely correct I inversed numbers in a grand error.

ZZ is metal shielded and should NEVER be used

2RS has plastic seals and id the bearing of choice

DD has never been seen by me in over fifty years and tens of thousands of bearings/

I saw this earlier and meant to correct it. Looks like I am going back into the hospital today. Kidneys and adrenals.

If you have repeated failures using sealed ball bearings in a dirty environment here's the cure (not hypothesis -- this really works)

Smear a gob of grease onto both sides of the 2RS bearing then install. The gobs of grease act as a barrier and the effect is not subtle.

Rotobrator machine with steel shot for refinishing alternator cases and stripped starter housings.
Exposed bearings lasted 2 weeks in an LS brand rotobrator. Changed bearings gobbed on grease and they lasted 5+ years.

Delco CS-130 exposed rear 6000XX bearing. Common failures. Gobbed grease over exposed side, no more failures. Ever. This cure really works for all exposed bearings/

Victory Lap FDA-04 alt repair kit,G3,has both bearings,20 bucks on Amazon.The problem started with an alarming belt squeak,thought I had it narrowed down....3 times!First was ac clutch bearing,no help.Next was idler and tensioner,no help.Replaced belt,nope.Installing alt bearings today but the old ones were good in my opinion.Hard to really pinpoint the noise with the stethoscope and the water and power steering pump is the only thing left.Any ideas?