Which alternator?

[RogerT]

Hi All
How do I tell which alternator I have on my van? Ropey bearings, and it'll either be a new alternator or maybe replace the bearings...

So how I know if it's 65A or 90A? Best place to look for part no?

Thanks in advance...

[R0B]

There is usually a sticker on it,the info you want is on there.

[itchyfeet]

assuming it's origional Bosch, and assuming petrol and diesel look alike, the 65 and 90 look different 90A on the left

[RogerT]

Thanks both for those quick replies, I'm hoping for a sticker but the difference in the end plates is a clear giveaway.

[itchyfeet]

in my experience stickers are usually long gone or illegible

If you are stll unsure get a pic up.

[R0B]

In that case,sorry for trying to help.

[itchyfeet]

Just my experience, yours is different, no right no wrong, no need to get upset

[R0B]

Im not upset.I was just going off the two i have here.Maybe im lucky that both of mine can still be read.

[itchyfeet]

As I said your experience is different.
I have never been that lucky.

[R0B]

TBH.Lately im thinking if i didn't have bad luck,i would have no luck at all.

[RogerT]

Gentlemen, you are both helpful, and have been for many years to many people.

I didn't find a sticker, but the backplate is clearly 65A. I didn't take the alternator off as slipping the belt off revealed that the bearing is spinning smoothly, a trace of lateral play but about 0.5 mm of fore-and-aft play, which is what I had first noticed on a cursory look-over. The water pump is also smooth, and no play.

So I shall resume my watchful waiting...

[itchyfeet]

Why do you think you need a 90A?
unless you have fitted lots of extras a 65A will be fine.

[R0B]

I thought the 90A one made your van go faster

[itchyfeet]

Only if you are lucky

[kevtherev]

Yes that desirable "upgrade" has always amused me.
45 amps is more than enough for these old ladies electricals.