PAS woodruff key and flange

[Jimm218]

Hi guys,

So my power steering has failed. I have removed the pump and discovered that the woodruff key is no more. Can anyone tell me what size the woodruff key is? Pretty sure my car is an early 4.2 but the size of both designs would help as I'm not sure which at this stage. Also the round flange plate that is bolted on to the triangular end of the pump has been damaged by the shattered woodruff key. Anyone know where I can get one?

Thanks in advance.

[Jimm218]

Further inspection shows that the shaft is shafted.

So the electric pump from the saxo...

I have seen that both versions of the pump have been used. With and without the external reservoir.

My question is how to plumb it in? Is it done with the standard connections and just bolt the two pipes to the correct outlets?

Those that have done it could you post some pictures?

Thanks

[Jimm218]

Hi Paul,

I saw that thread and it helped me get the old pump out. I've been searching and have struggled to find out how the electric pumps are plumbed in.

Below are a couple of photos of the shaft. I will get some of the flange on the pump when I'm back in the garage.





I did find a small grub screw in the flange. Not the size of the one in the picture in the other thread. It looks like it is forming a stop rather than bolting into the shaft. I doubt I could do that mod with the engine in place.

[Jimm218]

Interesting. I have access to a machine shop so fitting a grub screw to the outer flange is easy enough. Although I would expect the shaft would need to have at least a hole put into it and preferably a thread to hold it all together. Not sure how you would get a drill down there to drill the shaft?

Does someone have contact details for Jools?

[Jimm218]

Thanks for Jools' detail and the pic.

Superjuiced could you describe the fluid circuit? The original circuit was High pressure side of the pump to rack, rack to resivoir, res to low pressure side of the pump.

Does yours still have the same circuit with the extra res off of the pump with a single hose. So it works like an expansion tank?

That is how I think it would be done but don't want to end up having to take it all apart again. I'm supposed to be taking the car to the continent at the end of the month.

[Jimm218]

Thanks everyone.

I had thought that the shaft would be hardened and be a nightmare to drill. I'll try and find out if Joolz would then drive the grub screw into the key way or if it is there to hold the shaft in position better.

My pump flange now has two grub screws fitted and I am going to try this before going electric as it has cost me nothing. Just need to get hold of a woodruff key now.

I will post some pictures and my method as I go through the process.

Oh and I got the pump out without lifting the engine off the mount.

[Jimm218]

Sorry for the delay in getting back to you on this. I've been out of the country.

I will finish my write up later but to answer the question about the woodruff key it is 3mm wide but I'm not sure on length. Paul I ordered a set an was sent two sets by mistake. I could post a set to you if that would help.

[Jimm218]

That makes sense to me Paul. I need to put up some pictures myself.

Would you like me to post you a suitable size woodruff key or are you sorted? I used some Loctite jointing compound when I put mine back together apparently it is very effective.

[Jimm218]

From my experiences with PAS pumps what your describing does sound like a pump with air in it. As I recall the one on my Cerb started to make a noise when there was only a small amount below the min level.