help with new Bosch 150 A alternator

I decided to upgrade to a 150 amp Bosch alternator. I installed it and before I slid the serp belt back on, I discovered that the pulley didn't spin- at all. It appears to be locked up.
What am I missing? I have it removed now and I'm puzzled.
2005 High top

That's interesting . And sucks! ,but ya I think you have remove it and send it back?


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Never mind...I'm the idiot. I forgot that I dropped it before install. After looking closely, I saw the crack in the housing.
Now another question...Can I take it apart and install the new guts into my old alternator housing? Or does anyone know a reman place who could do this for me?
Otherwise I just wasted $200

dg55117 said:

Never mind...I'm the idiot. I forgot that I dropped it before install. After looking closely, I saw the crack in the housing.
Now another question...Can I take it apart and install the new guts into my old alternator housing? Or does anyone know a reman place who could do this for me?
Otherwise I just wasted $200

Click to expand...

Alternators aren't generally that tough to disassemble. Getting the clutch pulley off will likely be the biggest challenge. There's a thread around here with tips for that. I believe one guy suggested using an impact gun with short bursts.

I'd take it apart and visually inspect the parts. They should swap over 150 amp to 150 amp. Frame sizes do vary between amp ratings though.

vic

Thanks Vic.
I was afraid that the case sizes were different from the 90 to 150 amp.
Plan B I guess

dg55117 said:

Thanks Vic.
I was afraid that the case sizes were different from the 90 to 150 amp.
Plan B I guess

Click to expand...

If the bearings and mechanicals on the 90 amp are ok it would be worth exploring whether the voltage regulator and brush assemblies can be swapped in from the 150 amp. Those parts are often the same through a range of outputs.

A search for the regulator and brush part numbers should give a clue.

I suspect that the clutch pulley is the same between them too.

vic


Edit:
The regulator looks physically similar 90 to 150 amp, but the BMW listing of 90 - 120 amp Bosch is not encouraging.

Bosch 150 amp
http://www.ebay.com/itm/ALTERNATOR-...999-2006-/400538930879?_trksid=p2054897.l4275

Bosch BMW 90 -120 amp
http://www.ecstuning.com/BMW-E46-M3-S54_3.2L/ES578/ES2568298/

Some general info on the regulators is here.

https://sprinter-source.com/forums/showthread.php?t=19488

Thanks for the info Vic. I appreciate it.