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| Re: Alternator Info [message #232655 is a reply to message #232654] |
Sun, 08 December 2013 19:12   |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Senior Member |
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15 Volts is perfect, because you lose .7 volt through the diode in the isolator, ending up with 14.3 at the battery. If you don't have an isolator, it will be overcharging a fully charged battery. If you have 15 volts at the battery now, make sure the isolator is not shorted. You may find the amperage output stamped on the outside curved part of the alternator case, maybe just barely legible, in a line along the joint between the two case halves.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| Re: [GMCnet] Alternator Info [message #232658 is a reply to message #232654] |
Sun, 08 December 2013 19:37 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Richard,
The coaches typically came with a 80 amp alternator. It is pretty much a standard unit that you can get at any auto parts store. Just tell them that you want a 80 amp alternator for a 1975 Olds Toronado. That will work for the coach. Many have updated to a 7157 100 amp unit which will bolt in with no issues. You should upsize the output wire to the next size bigger, but the standard wire will work.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
On Dec 8, 2013, at 7:26 PM, Richard Andis <randis2@elp.rr.com> wrote:
>
>
> Looking for info on this alternator that is installed on my coach (78 Royale). Only writing I can find is the Delco-Remy name on the rear. Can't find anything regarding amperage. It puts out 15V. Additional photos in my gallery.
>
> http://www.gmcmhphotos.com/photos/data/6338/medium/00720.JPG
>
>
> --
> "Vahalla" - 1978 GMC Royale (Rear Twin)
> "Walküre" - 1974 VW Thing
>
> _______________________________________________
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: Alternator Info [message #232685 is a reply to message #232654] |
Mon, 09 December 2013 08:32 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| Richard Andis wrote on Sun, 08 December 2013 19:26 |
Looking for info on this alternator that is installed on my coach (78 Royale). Only writing I can find is the Delco-Remy name on the rear. Can't find anything regarding amperage. It puts out 15V. Additional photos in my gallery.
<photos snipped>
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Richard,
You have been give most of the information, but if you care, it is model 10SI with the 3" 2-foot mount. Very common internals, but good frames are getting a little scarce according to my rebuilder friends.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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