Looking for alternator

My Bosch PLus Pac 55 amp NAB900 type of alternator seems to get tired.
I am looking eighter for a good second hand or can someone help me where to find one.
Tx
Fred

It is my experience that my alternator pushes about 13-14 amps for about 20 minutes and then drops to 10-11. Any idea what may cause the drop?

Thanks,
Veek

[ QUOTE ]
It is my experience that my alternator pushes about 13-14 amps for about 20 minutes and then drops to 10-11. Any idea what may cause the drop?

[/ QUOTE ]

Hold on a sec - are you reading amps or volts? The CAV has a voltmeter, not an ammeter. Is that what's dropping from 13-14 to 10-11, or have you actually installed an ammeter? If you've got a 1-wire alternator, you need to hit a certain rev level before it will start charging - could that be what you're seeing?

(and this subthread should probably go in the tech section...)

My goof, VOLTS is what I was reading.

Thanks for the catch. I'll reopen on the Tech section.

Sorry on both counts.

Veek