alternator for 89PT40

[Leroy Eckert]

Gus, yours may not be like mine.
Mine has two 160 amp alternators. On my dash panel is a switch that is three way. Both, Alt 1 which is the one on top of the engine, and Alt 2. I typically keep the switch on both as there is a warning light next to it that is labeled fault, a red light. I have read on prior posts that this fault light had an issue of coming on from time to time for no reason. BB added a component???? to solve the problem. As I recall, my recollection is not perfect these days, the alternators fight each other to cause this problem. Seems like it was something to do with the regulators. My associated amp gauge will climb to 100 amps for a short period after starting and settle at 50amps. Alt 1 and Alt2 positions usually give me a reading of 25 amps. The main bus drawing calls for two 160 amp alternators. When I replaced mine, I had one 160 amp and one 135 amp alternator. I do not have sub drawings of how the amp gauge connects to the switch and
alternators to get the readings. The new alternators solved my problems.

Leroy Eckert
1990 WB-40 Smoke N Mirrors
Dahlonega, GA
Royale Conversion

Gus Rodriguez wrote:

Mike, thank you both for the information. I too am having charging problems. I recently purchased this bird and am new to all of this. I will be asking many questions in
the near future because I have several issues that I would like to address along with a general steep learning curve about Bluebirds. I didn’t think about rebuilding both. I just knew that the one on top of the engine was not working. The other one is putting out 13.2v at idle. The one on the top is a Leece Niville by Prestolite part no. 110-573 stamped 150Amps. I don’t know what the one in the rear is but it appears smaller. Should they both be the same? Also my dc voltage output meter in the dash shows no output at all. The needle is well below zero and does not move. What does the one in the rear power? (engine only?) and is it metered anywhere?

Thank you again for your help.

Gus

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From: WanderlodgeForum@yahoogroups.com [mailto:WanderlodgeForum@yahoogroups.com]
On Behalf Of mbulriss
Sent: Friday, March 14, 2008 11:43 AM
To: WanderlodgeForum@yahoogroups.com
Subject: [WanderlodgeForum] Re: alternator for 89PT40

Gus,

I agree with McMahan. According to my rebuild guy here in San Antonio,
you need to change them both at the same time, *especially* if you are
upgrading output. My rebuild guy also told me that the only
difference between the 145(150?)/160 Delco alternators was the
diameter of the front
pulley. So if you go the rebuild route you
should be able to get new pulleys to upgrade to the 160 with the
existing cores. Last time I freshened mine up though, Ogburn's Truck
Parts had new ones on sale for a lower price than I paid to rebuild!
They didn't have the pulleys on them as I recall, so you had to swap
yours. The one under the rear bumper is no big deal to change. The
one under the bed can be a real challenge, Make sure you add all new
belts and seal the floor panel under the bed with new butyl or sealing
tape to prevent fumes from seeping into the bus.

After you fix it, come join us at the Lone Star Birds Rally in April.

Have fun.

Mike Bulriss
1991 WB40 "Texas Minivan"
San Antonio, TX

-- In "WanderlodgeForum%40yahoogroups.com", "Mike McMahan" <mmcmahan@..<wbr>.>
wrote:
>
> Gus, I don't know if the
conversion is necessary(but it can't hurt)
> or not but I would probably do both alternators at the same time. If
> you do the change I would thinkl you had to change both and if you
> repair one I would go ahead and do both at the same time. Mike
> Mcmahan 96 42" Wanderlodge
>
> --- In "WanderlodgeForum%40yahoogroups.com", "Gus Rodriguez"
> wrote:
> >
> > Hello everyone. Can I get some advice on the replacement of an
> > alternator for an 89PT40 8V92T. Should I replace it with the same
> > (150amp) or go with 160amp high output that is said to work well at
> low
> > power settings? Any information is appreciated.
> >
> > Thank you
> >
> > Gus 89PT40 8V92T
> > Houston, Texas
> >
>

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