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 9Likes
02-14-2019, 09:47 AM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
CH
Cobra Make, Engine:
Posts: 536
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HELP! I need a rectifier (Diode) plate for my alternator
I need to replace the faulty rectifier plate on my C3SF-10300A alternator.
Can any one provide me an address I can find such one?
MANY THANKS
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!! 
Last edited by ALF; 02-14-2019 at 03:14 PM..
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02-14-2019, 12:38 PM
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CC Member
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Join Date: Jan 2005
Location: Seattle,
Wa
Cobra Make, Engine: ERA 3012
Posts: 141
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I believe the part numbers you are looking for are c4az-10373-a and c4az-10377-a. I bought mine from ebay. Looks like there are some available there now actually.
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02-14-2019, 12:39 PM
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Senior Club Cobra Member
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Join Date: Mar 2000
Location: St. Augustine,
FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,929
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Alf,
Here's another possibility: Alternators
Tom
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Wells's law of engine size: If it matters what gear you're in, the engine's too small!
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02-14-2019, 12:57 PM
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CC Member
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Join Date: Apr 2004
Posts: 1,029
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If you know which diode(s) are bad, they can be replaced. If there is an old starter alternator repair shop around you they will probably have diodes. I replaced a single diode in our black car's alternator decades ago.
__________________
Dan Case
1964 Cobra owner since 1983, Cobra crazy since I saw my first one in the mid 1960s in Huntsville, AL.
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02-14-2019, 12:59 PM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Superformance
Posts: 4,534
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Quote:
Originally Posted by Tom Wells
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Those are "2G" units and different from what Alf has.
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."
rick@autoventureusa.net
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02-14-2019, 02:58 PM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
CH
Cobra Make, Engine:
Posts: 536
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N to + are defect
I was today on a shop specialized on old cars electric.
He mentioned to me they can not be replaced one by one...
If yes it would be great. If not I‘ll search for the complet part.
The only option I‘ve at the moment is a new alternator for many $ as there are no spare parts abailable.
;(
If the numbers on the post from Andrew are correct I‘ll search for them.
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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02-14-2019, 03:29 PM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Superformance
Posts: 4,534
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Quote:
Originally Posted by ALF
N to + are defect
I was today on a shop specialized on old cars electric.
He mentioned to me they can not be replaced one by one...
If yes it would be great. If not I‘ll search for the complet part.
The only option I‘ve at the moment is a new alternator for many $ as there are no spare parts abailable.
;(
If the numbers on the post from Andrew are correct I‘ll search for them.
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Let me look in the bin, I may have a good used plate.
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."
rick@autoventureusa.net
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02-14-2019, 03:40 PM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
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Quote:
Originally Posted by Mark IV
Let me look in the bin, I may have a good used plate.
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Many thanks
I cross my fingers!!
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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02-14-2019, 03:57 PM
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CC Member
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Join Date: Apr 2004
Posts: 1,029
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The plates listed Feb 2, 1964 printing had C3SZ prefixes for + and - plates. The Aug 1, 1966 printing shows the C4AZ prefix numbers as service parts.
The C4AZ models are not all that uncommon on ebay®.
Diodes are not hard to replace but the 1964 Ford manuals is great to show and tell how.
__________________
Dan Case
1964 Cobra owner since 1983, Cobra crazy since I saw my first one in the mid 1960s in Huntsville, AL.
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02-14-2019, 07:57 PM
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CC Member
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Join Date: Apr 2005
Location: Tucson,
AZ
Cobra Make, Engine:
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A little advise, be very careful with those brushes when you reassemble the alternator. They break easily if you don't retract them during assembly. Ask me how I know this!
Larry
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Alba gu brŕth
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02-14-2019, 08:09 PM
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CC Member
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Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
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Quote:
Originally Posted by Mark IV
Those are "2G" units and different from what Alf has.
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Ford didn't start using 2G alternators until 1982. Those at the link appear to be variants of 1G alternators.
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Brian
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02-14-2019, 11:30 PM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
CH
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Quote:
Originally Posted by Dan Case
Diodes are not hard to replace but the 1964 Ford manuals is great to show and tell how.
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My Manual is somewhere between Los Angeles and Switzerland
For me the challenge will be to get the correct parts from the states as here in Switzerland they know about Porsche and VW and if you’re lucky Ford Mustangs.
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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02-15-2019, 02:26 AM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Superformance
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Quote:
Originally Posted by cycleguy55
Ford didn't start using 2G alternators until 1982. Those at the link appear to be variants of 1G alternators.
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You are correct, I mis-typed. However the new AMK units are really a "1G MK II" alternator as most parts will not interchange with the 63/64 round case, plug in type unit.
I do have new brushes for the early 1G if needed.
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."
rick@autoventureusa.net
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02-15-2019, 02:59 AM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
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Quote:
Originally Posted by Mark IV
Let me look in the bin, I may have a good used plate.
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Hi Mark
I assume, as you mentioned the brushes, you did not find some diode plates in the bin?
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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02-15-2019, 04:34 AM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
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Quote:
Originally Posted by Mark IV
I do have new brushes for the early 1G if needed.
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Are the brushes C3SZ10347B?
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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02-15-2019, 05:09 AM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
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Quote:
Originally Posted by ALF
Are the brushes C3SZ10347B?
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Yes, those are the brushes I have. And I do have some used diode plates but I will need to have them checked at the alternator shop. You already have a bad one, you don't need to pay to ship another bad one!
__________________
"I'm high all right, but on the real thing....powerful gasoline and a clean windshield..."
rick@autoventureusa.net
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02-15-2019, 05:18 AM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
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Quote:
Originally Posted by Mark IV
Yes, those are the brushes I have. And I do have some used diode plates but I will need to have them checked at the alternator shop. You already have a bad one, you don't need to pay to ship another bad one!
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Great!!
PM sent
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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02-15-2019, 10:37 AM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
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On ebay both got sold...
But i hope on them from Mark IV
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
Last edited by ALF; 02-15-2019 at 10:39 AM..
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02-15-2019, 02:16 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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When reassembling the back case do not forget the two mounting spacers that go on the mounting studs prior to assembly. Also there is a hole on the rear portion of the case to slip a pin into to hold the brushes away from the armature, pull the pin out after reassembly.
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02-15-2019, 02:22 PM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
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Thank you John
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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