8V92 alternator questions

[jqrjr]

Don,

I have an 1988 WLWB with an 8V92, i had problems with my alternators
also. On my coach (older) you can access the front alternator from
the engine compartment. The front alternator was intermitantly
putting out 150 amps, when this happened all my guages would show
higher than shold be responses. both my alternators come to a bus bar
on the right side of the bus in the front of the engine compartment.
Open the right rear louvered door on the bulkhead there was where all
alternator wire came to eaisly you can disconnect there and
individually test each output. My rear alternator was out and the
front one was behaving badly. I repalced both of them, and carry a
third as back-up. The pulley on my rear one is not the normal width
as it is a tight fit in the rear of the coach. we were able to find
an additional match but not from BLurBird!

Jim Riordan
1988 WLWB XXV
Stuart, Fl.

--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
wrote:
>
> I've got a few questions after I describe what I'm seeing on my
dual-alternator 8V92:
>
> After starting, the voltage is somewhat below 13, and alt2 is
running about 50 amps. Alt1 is essentially zero, although there is a
slight upward blip when changing the display from alt2 to both.
>
> Voltage slowly rises, and after quite a distance (100 miles or
more) the voltage is in the 13.5 range. At around that time, the
Fault light comes on. Alt2 at this point is running around 25 amps,
and there is no apparent increase in the both position.
>
> What do other 8V92 dual-alternator owners see for charge rates, 1,
2, and both? I'm presuming the zero/near zero is telling me I have a
bad alternator, but is the 50 amps from Alt2 also low? If it is, what
does that mean?
>
> Does anyone know, on theirs, which alternator is 1 and which is 2?
Front top, or back by the bumper?
>
> Don Bradner
> 90 PT40 "Blue Thunder"
>