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Old 05-23-2012, 10:42 PM   #1
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1987 32.5' Airstream 325
Windsor , Ontario
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Alternator problem

I have a 1976 Argosy MH with a 454. I recently replaced the alternator and is workiing great. The problem I have is with the "junction post" that is in-line after the alternator.

This is a plastic junction with an imbedded threaded post and nut, It secures the power load wire from the alternator and connects to other load bearing power wires.

The small bolt/nuts that held it to it's bracket gave way to rust and broke off as the post has given way within the plastic.

Needless to say I'd like to replace this as the connection is not good(rig lost all power on my last trip home).

Does anybody know what this item is called(as they must be common on all 454's) and or part #?, where I can order etc.

Thanks in advance
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Old 05-23-2012, 10:52 PM   #2
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It is a battery isolator which allows the alternator to charge the chasis battery and the house battery, but keeps them separate so they do not run each other down when the engine is shut off.

It is a common item at RV parts places. Also, you can sometimes find them at normal auto parts stores. Ask for a "RV battery isolator" They are in the range of $50 to $100 depending on where you buy them. For your Argosy you need one with the capacity of the original alternator, which was 60 amps. You can get a 90 or 100 amp one easily and that is the capacity I would recommend.

The center post goes to the alternator, either of the other posts goes to the chasis battery and the other one to the house battery.
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Old 05-23-2012, 11:02 PM   #3
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I just bought an isolator off of Amazon, "Tekonsha 7000 12 Volt 3 Terminal Battery Isolator", to have on hand. Looks like an exact match.
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Old 05-24-2012, 06:08 PM   #4
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Alternator problem

Many thanks for the replies guys.

Is this the unit just tp the right of the batteries that has a fuse on it?

If so, this not what I seek. The junction I need sits on top of the engine between the carb and alternator. Will get a picture and post.

Thanks again
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Old 05-25-2012, 11:29 PM   #5
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I have attached a copy of a picture of the item I'm asking about
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Old 05-26-2012, 12:57 AM   #6
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You can rule out the isolator that I bought. Can your part be repaired with a through bolt that is insulated in back?
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Old 05-26-2012, 09:41 PM   #7
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you might find something like this at an auto parts store:
YnZ's Online Store - Single Junction (Black) (Powered by CubeCart)
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Old 05-27-2012, 09:10 AM   #8
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Alternator problem

Thanks for the replies,

Fixing the one I have may be best solution....now I need to get it off the rusted and stripprd post.

Cheers
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Old 06-04-2012, 06:46 PM   #9
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I just replaced the original 3 wire ALT with a 1 wire. I have the part you need. I think it is in good shape. Let me know if you still need it.




Quote:
Originally Posted by realpank View Post
I have a 1976 Argosy MH with a 454. I recently replaced the alternator and is workiing great. The problem I have is with the "junction post" that is in-line after the alternator.

This is a plastic junction with an imbedded threaded post and nut, It secures the power load wire from the alternator and connects to other load bearing power wires.

The small bolt/nuts that held it to it's bracket gave way to rust and broke off as the post has given way within the plastic.

Needless to say I'd like to replace this as the connection is not good(rig lost all power on my last trip home).

Does anybody know what this item is called(as they must be common on all 454's) and or part #?, where I can order etc.

Thanks in advance
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Old 06-04-2012, 07:14 PM   #10
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Online, but I would try NAPA first.

Bob
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