Alternator Amperage? - Part Numbers: 2095191 (front), 3874271 (rear)

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Lord Sparky

Lord Sparky

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Does 50 amps sound correct for these alternator part numbers?
  • Part Numbers: 2095191 (front), 3874271 (rear)
  • Chrysler Square Back
  • 12 Volt, 50 Amp
  • CW Rotation
  • 2 Pulley Groove

E99DCBAC-5D38-4A7F-838A-3678FBA637F8.jpeg
 
Sounds about right.
I took one out of a 1984 Dodge ram that had a 65 amp rating. It was a Napa refurbished one.
However I would not go past 60-65 without upgrading the wiring.
 
Lord Sparky said:
Does 50 amps sound correct for these alternator part numbers?
  • Part Numbers: 2095191 (front), 3874271 (rear)
  • Chrysler Square Back
  • 12 Volt, 50 Amp
  • CW Rotation
  • 2 Pulley Groove

View attachment 1715650468
Click to expand...
No.
Those may be casting numbers for the end shields.
Squarebacks start in '72
The p/n was stamped. There's a picture in the sticky thread showing where to look.
Starting in '74 they got metal tags also shown in the sticky thread.

I don't have anything like a complete list but for '74 a production '50 amp' with the 2.75" double sheve pulley was p/n 3755 411
Lester 7509 or 7509A is a common crossref for replacments. 'Rated 60 amps' FWIW.
 
Mattax said:
No.
Those may be casting numbers for the end shields.
Squarebacks start in '72
The p/n was stamped. There's a picture in the sticky thread showing where to look.
Starting in '74 they got metal tags also shown in the sticky thread.

I don't have anything like a complete list but for '74 a production '50 amp' with the 2.75" double sheve pulley was p/n 3755 411
Lester 7509 or 7509A is a common crossref for replacments. 'Rated 60 amps' FWIW.
Click to expand...
After much sleuthing, I figured it out. There was no pressed part number on the bottom of the square back, but there was a mostly illegible paper sticker on the side. Luckily, the previous owner handed over all the receipts. NAPA part number: 213011, which matches the sticker. 45-50 amps. Thanks for your help. Didn’t see the sticky.

464E7120-FBB8-438C-BE91-2522979002AD.jpeg
 
I want to say it was in the 1990s when NAPA electrical parts were some of the best we could get from a parts store.
 
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