steering pump

misterderek · Post by **misterderek** » 16 Dec 2008, 07:28

Volvo V40 TD 1998

I cant seem to be able to remove the steering pump from the car because the 3 branch support for the drive belt pulley that is on the pump drive shaft wont pass through the aperture in the aluminium casting that the pump is mounted on.
Can the 3 branch pulley support be removed ? There appears to be a hexagon bolt on the thing but I just cannot move it. I must be doing something wrong !!!

Post by **billofdurham** » 16 Dec 2008, 12:47

Welcome to Matthew's Volvo Site.

You need to remove the pulley to get the pump out.

Block the pulley using a drift or a strong screwdriver. Remove the three retaining bolts and the pulley.

Bill.

misterderek · Post by **misterderek** » 17 Dec 2008, 01:45

Bill
Many thanks for your reply.
I have indeed removed the belt pulley - that was the easy bit! What stops me removing the pump itself is the '3 pronged' pulley mounting, attached to the pump drive shaft (see photo), to which the belt pulley is bolted; that simply will not pass through the aperture in the aluminium casting.
I have approached Volvo where I live (Limoges in France) for advice and they say their guys have never replaced one !! All I do know is that apparently a new pump would be 850 euros and I'm wondering if the reason for this huge price is because it includes the casting, the whole thing coming as a assembly.
Even though the engine is basically a Renault 19 TD, I guess the ancillaries, like the steering pump and alternator, are attached to this special Volvo casting that fitted to the basic engine.
Sorry to ramble on but I guess my real question is whether I can remove the '3 pronged' pulley mounting piece from the pump shaft. Because if I cant, even if I get another second hand pump, I still wont be able to fit it to the casting/engine.

The pump is a Delphi Saginaw with the following reference numbers :-
26041434
7700872160 D
7700843918

Any direct advice would be great but if you have any other tecnical contacts in the Volvo world or Delphi Saginaw who could help then I would be most grateful. I can't scrap the car just because of this problem !!

Thanks
Derek

p.s. Sounds brutal I know , but I had to cut the pump shaft in order to remove the pump from the casting. My attached photos show the 3 pronged pulley mounting on the pump and the other in relation to the aperture - i.e. wont go through especially if still attached to the pump. You will see that there is a hexagon type of bolt or nut - but I simply cannot turn it .

Post by **billofdurham** » 17 Dec 2008, 12:42

Pictures with French sub-titles! We don't see many of those.

3 branch support for the drive belt pulley that is on the pump drive shaft

My apologies as I misread this bit thinking it was a support for the pump.

Volvo techs, what do they know? You remove the pulley support using a 3 leg puller.

This is the VADIS instruction:

: Steering pump pulley support.jpg (40.83 KiB) Viewed 1957 times

If you need any more please post.

Bill.

misterderek · Post by **misterderek** » 18 Dec 2008, 01:37

Bill

Thank you very much for the graphic assistance - that couldn't have been more helpful !
Of course the one thing I didn't do was take the 'A' dimension before I cut the shaft !!! Oh well will have to do my best when refitting though I do understand the implications ref. belt pulley alignment.
On that subject Bill, do I assume that refitting the flange, (once the pump is reinstalled to its alu mounting excluding flange), is achieved by pressing it on using a bolt screwed into the pump shaft internal thread, together with a nut plus spacers which when tightening the nut should push the flange onto the shaft. Perhaps heating the flange up in the oven may help. Hopefully the shaft will not turn as I tighten the nut !

Would there be a 'Vadis' description of the job by the way ?
Sorry to ask more questions but I don't want to make any more mistakes like the A dimension.

Many thanks
Derek

Post by **billofdurham** » 18 Dec 2008, 12:57

As with many jobs Volvo have special tools but I think an improviser can get around these.

: Installing power steering pump flange.jpg (18.34 KiB) Viewed 2119 times

: Steering pump press tool.jpg (18.75 KiB) Viewed 2116 times

The other part mentioned, 999 5307, is a large spacer/washer.

Hope this helps.

Bill.

misterderek · Post by **misterderek** » 19 Dec 2008, 02:18

Bill

Once again great info !!
Just a bit of clarification please as to the correct use of the tool, or an improvised version.

Would I be right in thinking that having bolted the tool into the pump shaft internal thread (together with flange and washer), that you turn the nut as if unscrewing it, exerting a pulling force on the shaft, therefore pressing the flange on to it. Or am I misunderstanding the principle, that somehow turning the bolt head achieves the same thing ?

Hopefully this should be my last question on the subject !!

Many thanks
Derek

Post by **billofdurham** » 19 Dec 2008, 09:54

The special tool is obviously threaded with two different size threads.

The way I understand it is that the smaller threaded end is screwed into the shaft and the larger nut is tightened to push the pulley onto the shaft. The large washer/spacer simply spreads out the force exerted by the large nut. To stop the whole thing turning as you turn the large nut you will put a spanner on the bolt head.

Looking at the picture of the tool I think you should be able to achieve the same result by using an ordinary bolt which would screw into the shaft with a nut further up the bolt to exert the pressure. To spread the force more evenly I would use four or five washers between the nut and the pulley starting with a smaller one at the nut and working up in size to that against the pulley.

Bill.

misterderek · Post by **misterderek** » 26 Dec 2008, 10:36

Bill

I got my local agricultural engineer to pull off the pulley support from my replacement pump, using a 3 legged puller; though he did have to angle grind a bit off the feet to make it fit and heat the support up as well.

Being loathe over the years to throw anything away I luckily found an old series Land Rover diesel engine manifold stud with the right thread to make my press tool .The pump shaft, which of course is not metric , needed a 3/8'' bolt and voilà I found one ! I don't reckon I would have located such a thing here in metric land.
Progress ?

Derek

Post by **billofdurham** » 29 Dec 2008, 12:09

Progress indeed!

Good old Landies. They have been saviours on many occasions but to mend a steering pump must be a first.

Bill.