Help a newbie identify an alternator?

[Amazonian66]

Hi all! We bought 66 122s a couple of years ago. It’s a fun little drive. I really want to keep it on the road forever. I have very little mechanical experience but a whole lot of can-do attitude. Recently my alternator failed. I took it out and cleaned it, seemed that the components I could reach were still conducting but couldn’t remount it which is when I discovered that the pivot bolt attaching the conversion bracket to the engine was sheared off, but the tensioner arm was fine. After much penetrant and struggle, I removed the broken bolt and remounted the alternator, but alas, it does not charge the battery.

So, I assume I need a new alternator and I have seen a few online. However, I’m not sure which ones will fit the conversion bracket. The old alternator looks rather like a bosch, but the sticker is missing. On the underside, all I found stamped was Made in Germany. The former owner had a thick folder of service records and it seems the conversion was done in 2001 but the invoice only specs “customer supplied parts.”

I’m attaching a couple of photos of the insides and clean outsides and hopefully one of you might recognize it. This little trooper made it 23 years. I can also take more photos, these were my references for putting it back together. The third picture is the bracket, before I cleaned it.

If anyone has a suggestion of anything else I should test, I’m all ears. Thanks in advance.

[Ron Kwas]

A66

That looks like an oe Bosch Alt, and the mount looks like the adapter bracket offered by IPD to allow fitting the Alt to an early B18 without the cast-in provision.

Cheers

[142 Guy]

I believe that Ron is correct. That looks like the early Bosch 35 amp alternator. There was also a 55 amp version which I believe looks pretty much identical.

There are some replacement parts available if you search. If you are not electrically knowledgeable, your best bet may be to take it to an automotive electrical specialist for testing and they may have the parts to repair it.

RockAuto has 1 remanufactured 35 amp Bosch alternator available. You need to look in the 140 listing because the Amazon was not normally equipped with an alternator
https://www.rockauto.com/en/moreinfo...t=2412&jsn=400

Tip - the reman alternators need the original fan & pulley.

There are aftermarket new replacements available which 'should' fit a B18 although I don't know about the IPD bracket.