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Power steering pulley size

qkcuda

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I am at work and trying to order a new belt for my 66 Charger. They list two pulley sizes, 4 3/4 inches and 5 1/2 inches. Here is a picture of the pump. Does anyone know which size this should be?

power steering pump.jpg
 
The size of the belt or the size of the pulley?

Either pulley if it lines up should work. The 5-1/2” might work better to feed the pump unless you have an engine built to really wind up rpm’s.
 
Or, tie a piece of string around the pulleys with the adjusters at 1/2 way, then measure the string
 
Sorry, I was asking because I am not currently near the car. I can measure when I get home.
 
I would say 5 1/2. Compare to other pulleys in the picture.
 
I found a picture of my original belts from when I disassembled the engine. Based upon those it appears to be the smaller 4 3/4 pulley, but I will confirm when I get home.
 
Thanks for all replies. I confirmed when I got home that it has the 4 3/4 pulley.
 
I found a picture of my original belts from when I disassembled the engine. Based upon those it appears to be the smaller 4 3/4 pulley, but I will confirm when I get home.
I just measured my 67 and that’s the size, 4 3/4”. You know where I can get a new one? I just mine was a little screwed up.
 
Thanks for all replies. I confirmed when I got home that it has the 4 3/4 pulley.
How did you make out with your pump pulley situation? Im pretty much having the same problem. My pulley is damage and I can get a new pump with the pulley but its
Thanks for all replies. I confirmed when I got home that it has the 4 3/4 pulley.

I am at work and trying to order a new belt for my 66 Charger. They list two pulley sizes, 4 3/4 inches and 5 1/2 inches. Here is a picture of the pump. Does anyone know which size this should be?

View attachment 1855361
 
I am at work and trying to order a new belt for my 66 Charger. They list two pulley sizes, 4 3/4 inches and 5 1/2 inches. Here is a picture of the pump. Does anyone know which size this should be?

View attachment 1855361
I have to change my power steering pump due to the pulley has damage. I inquired about a Bergson pump and asked about the difference in the pulley size. They said my old pump was designed with the 4 ⅝ and their new pump is 6 ¾ and it shouldn’t be. Problem.

Screenshot 2025-05-30 at 5.21.10 PM.jpeg.png
 
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