Power Steering Pump Interchangeability [Archive] - Audi Forums

: Power Steering Pump Interchangeability


troysherk
02-04-2013, 03:30 PM
Alright, to recap my problems I've posted in other threads, I bought a power steering pump for my 1991 Audi 90 Quattro 20V from a fellow helpful Audi guy, but it is the wrong pump for my car. There are three ZF pumps involved which will be referred to as original pump, correct pump, and replacement pump.

The original pump could also be called the wrong one. I have no idea why it was on the car when I bought it. It was putting out the wrong pressure, but does appear to hook up right. Anyway, the serial number for this pump is 7681 955 103 and is dated 12-83. The correct pump (which is neither the one I had nor currently have) is 054 145 165 and is for late '90 and all '91 cars. The replacement pump is 034 145 165, which is for early '90 cars. The date on that pump is 12-89.

So, the pump that came with my car when I bought it a couple years ago is not the right pump at all and wasn't doing an acceptable job of supplying the correct pressure to the hydraulic pressure accumulator and steering rack. The pump I have to replace it is for an earlier car.

I'm really not sure what the difference is between the earlier 034 pump and the later 054 pump other than the farthest forward banjo bolt on the top of the pump when mounted does not fit the 034 pump. So right now I am looking for either the correct banjo bolt for the earlier pump, which I'm not sure will fit through the hose fitting since it's a wider bolt, or I would be interested in purchasing a well-functioning 054 pump off someone who owns one.

Can anyone out there supply me with either the bolt or the pump? Or at least point me in the right direction? Thanks!