I just got a used power steering pump shipped to me. The pump looks to be the one with the small hex in center of shaft, or the 1.2 type equipped with a 7 inch diameter pulley.

My existing pump has the ‘plain end’ shaft, I believe it to be the .96 model, and has a 5 ½ inch pulley. According to the FSM, this pump has the ability to compensate for higher or lower engine rpm, by automatically reducing boost over 3000 rpm.

Mounting brackets for booth pumps look to be a bit different, but it looks as if this used pump will bolt up to my engine bracket.

Should I keep the larger pulley on the used pump, or swap my smaller pulley on to it? Am I going to have even more ‘over boosted’ steering above 3000 rpm, than my present pump, keeping in mind, that due to gearing, 60 mph is about 3000 rpm for my car?

Bill

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

ok I maybe lost.But here goes. If the new pumps pulley
is close to or the same as pulley driving it pump rpm
will be reduced. depending on pump valving and
pressure this maybe not good. If new pulley is smaller than
drive pulley pump is overdriven. Ita a drive ratio thing.

lol shadetree

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brass handled wrench,bfh and a BIG screw
driver. If it aint drawn blood you aint done.