Power steering pumps

CitroenCrazy · Post by **CitroenCrazy** » 20 Mar 2005, 18:29

I have a 1993 1.9TD ZX, on which the PAS pump has failed (pulley & shaft rattling around the bottom of the engine compartment...)
I got myself an identical looking pump from a breakers, but the pulley diameter is different. Mine is 115mm, replacement is 135mm.
Swapping the pulleys sounds easy, but I've failed so far.
Has anyone done this succesfully ?

oilyspanner · Post by **oilyspanner** » 20 Mar 2005, 20:48

An easier route might be to buy a longer belt.
Stewart

CitroenCrazy · Post by **CitroenCrazy** » 20 Mar 2005, 21:41

Yes, I thought about that. However, one has to believe that someone sat down to calculate the best pulley size. If I go with the larger version, it will turn 25% more slowly, hence have lower output & thus less assistance.
I presume that the 135mm pulleys have different crankshaft pully diameters too.
Anyway, it's a moot point now (3 hours later).
I convinced myself it must be an interference fit & all it required was a drift and a good beating with a big hammer.
This resulted in the back end of the casting breaking off & exposing the rear bearing. The iron was only about 1 mm thick at that point. Having scrapped it, I hacksawed through the old pulley to prove a point - they ARE an interference fit, but presumably shrunk on, so little of no chance of removing one & replacing it with another.
Now all I need is another pump.......