alternator question

I have a 94 Wagon it has a 140 amp alternator. Was wondering what is the usual life of these, I do know conditions vary so it a is a semi silly question have 155k on it know it works fine at this time. Car has lived in south central Georgia and now way north in Florida so the A/C does get used as needed. I complete realize conditions vary and their is no lets say fixed answer to my question.
Just was wondering what others have learned along the way if I am on borrowed time already of may be ok for a while any input from the group would be appreciated. Need to save up and prepare and does any one have a suggested brand, or a darn sure do not use list. I usually only use AC Delco parts, some of the stuff out their is not worth a hoot as I am sure you all know.

Alternators are very much like women,.

some will go a really long time and give you no aggravation,. others will quit at a most inopportune moment,.

still others will just slowly give up, till you change it,.

Don't try and fix something thats not broke,..

phantom 309 wrote:

Alternators are very much like women,.

some will go a really long time and give you no aggravation,. others will quit at a most inopportune moment,.

still others will just slowly give up, till you change it,.

Don't try and fix something thats not broke,..

was not going to replace it it works fine, my question was are their brands to avoid, like with some fuel pumps pumps. Wanted to get a spare for my shelf for when the day comes. I live in an area that you do not get quality parts like I want same day, maybe junk sold by the big 3 parts places maybe not. I will not by some of that junk total waist of time and effort. just planing ahead and have the desire to get a spare would seems like it will not be long, may be several years, maybe not lots of thing for our wagons are getting harder to find at the drop of a hat. I try to be ahead of the game. My car is 4 times more reliable and predictable than any female other than dear old Mom

What is the charging voltage?
If I'm not mistaken, this is a larger version of the 10SI alternator.
Rebuilding them DIY is fairly straight forward, I last rebuilt one 10 years ago. I would think that any "new" alternator would be a remanufactured unit.

After 155K miles and 22 years service, why would you not replace with an AC/Delco?

The remanufactured ones have new bearings, brushes, diodes, etc. The windings and housings almost never fail.

phantom 309 wrote:

Alternators are very much like women,.

some will go a really long time and give you no aggravation,. others will quit at a most inopportune moment,.

still others will just slowly give up, till you change it,.

Don't try and fix something thats not broke,..

 So poetic,you silver tongued devil...