Vickers power steering pump rebuild

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Vickers power steering pump rebuild

Postby 230ew123 » Tue 24 Jan, 2017 11:59 pm

Well, here we go, time for me to give back. I sourced a second pump from tsharkey's 1985 230TE m102. It is a Sperry Vickers.(refer to images for it's number). Tsharkey has been most generous and kind to me, knows heaps about mercs and is 10 minutes drive way, what can be better!

I wanted a second pump to rebuild as it does not take a car space like a wreck and won't annoy the neighbours. God knows I have enough stuff. That way I can keep my 230e on the road whilst making my way to stop the slow leak from it's ZF power steering pump.

I do not know for sure if it fits, no one can tell me, Tonyfromwestoz, encouraged me to give it a shot. They look very similar, operate at the same pressure, mounts look similar (admittedly have not measured), they even smell similar..

I did not feel like using my crude triple arm puller on such a fine and delicate pulley so followed some suggestions to tap it off with the nut on. Trouble is, when tapping it out with gentle(ish) blows the circlip holding the axle in place comes off too, so the axle comes out at the same time. But I think it is ok still.

Dismantling is the easy bit so far, just don't loose the little pieces.

Hopefully the pics turn out ok, I had to fiddle so the images would get uploaded..if they are too small, I'll try again.

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Last edited by 230ew123 on Wed 25 Jan, 2017 12:37 am, edited 1 time in total.
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Re: Vickers power steering pump rebuild

Postby 230ew123 » Wed 25 Jan, 2017 12:01 am

The advantage of having a second pump is that (if it fits) I can just slide her in lessening downtime off the road. Also I can comfortably take pics without trying to beat time. Clean it properly, and have a really good look.

If it does not fit, at least I have become more familiar with steering pump assembly, which makes the next time (it will leak again eventually) easier.
Last edited by 230ew123 on Wed 25 Jan, 2017 10:55 am, edited 1 time in total.
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Re: Vickers power steering pump rebuild

Postby CraigB » Wed 25 Jan, 2017 7:56 am

Fascinating - I've never seen one apart. I note it is a 126 part number, so no doubt originally on a 126 and then used the same part on 123. So a source for these pumps no doubt on a 126 - will check the part number on mine. With the dismantling, i guess supporting the pulley and the pump with a little bit of gap might fix that - if that makes sense. To break that bond the pulley only needs to be shocked off the shaft, not like the whole weight of the pump needs to dangle. Just a constructive thought. Or can you deliberately remove the circlip and the shaft and then remove pulley later? It still worked though - i guess the risk is damaging the groove for the circlip, but imagine the shaft is harder and it is the circlip edge that would be rounded off and no doubt there is a new one in the kit. And yes i have been tricked with the inline thing, puts the new one at top not bottom.... but you will only make the mistake once!
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Re: Vickers power steering pump rebuild

Postby 230ew123 » Wed 25 Jan, 2017 10:42 am

Good observation Craig, in hindsight it may be possible to remove the backing plate first, before the pulley, then remove the circlip on the axle. That way you have a flat surface across the pulley (bit of wood or something) to sit your clamp for the backing plate squash.

Then remove the axle after removing the vane housing and vanes. It is the snuggest, perfectly engineered fit so even with a minute amount of oil it seals and kind of bonds, so the gentl(ish) persuasive blows can help.

Hitting the nut above the pulley with the axle still in the housing shall not make a difference at holding at a low height (besides dropping and damaging the housing). The circlip would pop regardless.

Take note that the axle, my guess it is chrome vanadium, is very tough (ever tried cutting chrome vanadium steel?!). Don't have to worry about damaging that groove. The circlip is not something heavy duty, but would be easy to replace, it does not come in the kit. In my opinion the kit is not great value for 2 rubber o rings and a copper crush washer..if you measured them you could probably source them much much cheaper individually. It should be 3-5 bucks rather than 30 odd, genuine merc rubber and copper or not..

For the most part, the circlip holds two pieces in place whilst assembling. Once the entire unit is assembled the circlip only plays a minor role, as the large spring holds the vane housing in place. I consider my circlip ok still.

Both pumps I have from w123's (zf 1984 230e and vickers 1985 230te) start with the numbers 126. I suspect the radiators from 123's are the same as 126's too.


"And yes i have been tricked with the inline thing, puts the new one at top not bottom.... but you will only make the mistake once!"


are you referring to the inlet and outlet connections here? Yes, it makes sense that the inlet is the reservoir. Internally in the pump housing, the exit is a larger slit shaped hole.
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Re: Vickers power steering pump rebuild

Postby CraigB » Wed 25 Jan, 2017 10:46 pm

sorry, the posting of images - after you upload them it doesn't put the at the end of the list but at the beginning - referring to your ordering of photos problem mentioned earlier.
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Re: Vickers power steering pump rebuild

Postby 230ew123 » Thu 26 Jan, 2017 12:36 am

cool buddy, just software stuff, sorted
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Re: Vickers power steering pump rebuild

Postby AMG » Fri 27 Jan, 2017 1:25 pm

Going to sticky this and move the thread to the Reference library.

Great to see an awesome technical contribution like this. Fantastic work, and thank-you on everyone's behalf :occasion5:
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