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oil/water pump 1

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    • oil/water pump 1

      Hi Ned and a Merry Christmas and Happy New Year to you and yours,

      Tried to email you but work must be offline.
      Battliung to get correct parts for oil/water pump from agents....they imported the wrong parts and can't find a listing for the correct bits! Even with my VIN number.(Only in Africa?)

      Do you have the BMW part numbers for the following:
      i) the 19 tooth oil pump gear/shaft. (they gave me a 31 tooth gear)
      ii) the complete mechanical seal. (I got a normal oil seal from them)

      They also supplied a steel spacer (??), and a pressed electroplated steel water impeller (??) Mine is a cast iron seat with a cast iron impeller/cover. Hope yours was the same.

      Cheers mate, Frank
    • Re: CALLING NED

      Me again. Should have referred to your excellent pics and post first.

      I see that you also got that pressed steel impeller. Now i am totally confused because my water pump consists of a dished seat Like yours) but with a cast iron impeller/cover that bolts up to the seat.

      I seem to remember that our VIN numbers were pretty close and would therefore imagine that the water pumps are similar.

      Unless of course one of the previous owners replaced the complete pump. Unlikely, and we checked all pre-1986 and post-1986 fishes but could not find a cast iron impeller. Yet, in the Heynes exploded view, as well as on their fish, a cast impeller is clearly shown. Nowhere does it show your pressed steel impeller.

      How does your impeller work and what does your cover look like. If you have a home computer, please email a photo. Cheers.
    • Re: CALLING NED

      This cheap looking part is the one and only, which is listed as actual impeller in the EPC.
      The old one:
      [Blocked Image: http://www.grimselpass.kilu.de/bilder/pump1.JPG]

      The new one, since about 1989 on:
      [Blocked Image: http://www.grimselpass.kilu.de/bilder/pump2.JPG]

      Other parts like old 19 tooth gear, old pump:
      [Blocked Image: http://www.grimselpass.kilu.de/bilder/pump5.JPG]

      Newer pump with more teeth on gear, don't worry it works...:
      [Blocked Image: http://www.grimselpass.kilu.de/bilder/pump3.JPG]

      [Blocked Image: http://www.grimselpass.kilu.de/bilder/pump4.JPG]
      Schöne Grüsse, Ralf CH
    • Re: CALLING NED

      Hi Hoechst,
      Thanks for the info. My bike is a 1986 model aned therefore has the solid cast iron impeller and also the 19 tooth oil pump gear. Do you have the BMW part numbers for these as well as for the mechanical seal. I understand that my model does not require the spacer. Auf wiedersehn.

      Fohe Weihnachten und ein gutes Neues Jahr. (with a little help from my Austrian wife.)
    • Re: CALLING NED

      Well Frank , here's my christmas present for you:

      Look at the parts and the part list under the picture. There is your Z=19 gear.
      <!-- m --><a class="postlink" href="http://www.realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_1974&hg=11&fg=35&lang=en" onclick="window.open(this.href);return false;">http://www.realoem.com/bmw/showparts.do ... 35</a><!-- m -->

      Look here an you'll find the Z=32 gear and the matching further parts. May be this is the only one deliverable, and no old parts with Z=19..
      <!-- m --><a class="postlink" href="http://www.realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_1818&hg=11&fg=35&lang=en" onclick="window.open(this.href);return false;">http://www.realoem.com/bmw/showparts.do ... 35</a><!-- m -->

      Also you could check the prices and the correctness of the order you did by your dealer. From here, cannot list the parts YOU need, because sometimes there is a mixture of elder and newer parts. If you like to renew the complete pump, please check also the surface of the shaft, where the seal ist placed. If it is used, aou could place the new seal a little bit beneath - so deeper or less deep in his bed..
      Schöne Grüsse, Ralf CH
    • Re: CALLING NED

      "hoechst" wrote:

      Well Frank , here's my christmas present for you:

      Look at the parts and the part list under the picture. There is your Z=19 gear.
      <!-- m --><a class="postlink" href="http://www.realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_1974&hg=11&fg=35&lang=en" onclick="window.open(this.href);return false;">http://www.realoem.com/bmw/showparts.do ... 35</a><!-- m -->

      Look here an you'll find the Z=32 gear and the matching further parts. May be this is the only one deliverable, and no old parts with Z=19..
      <!-- m --><a class="postlink" href="http://www.realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_1818&hg=11&fg=35&lang=en" onclick="window.open(this.href);return false;">http://www.realoem.com/bmw/showparts.do ... 35</a><!-- m -->

      Also you could check the prices and the correctness of the order you did by your dealer. From here, cannot list the parts YOU need, because sometimes there is a mixture of elder and newer parts. If you like to renew the complete pump, please check also the surface of the shaft, where the seal ist placed. If it is used, aou could place the new seal a little bit beneath - so deeper or less deep in his bed..


      Danke Hoechst. From the part numbers you supplied and referring to the part numbers on my invoice, I can clearly see that I was supplied parts for the 32 tooth setup ie post 1989.
      I will go there tomorrow and show them what the Forum can do, which they can't, even though they had my VIN number. Many thanks. Frank
    • Re: CALLING NED

      "OoB" wrote:

      "hoechst" wrote:

      Well Frank , here's my christmas present for you:

      Look at the parts and the part list under the picture. There is your Z=19 gear.
      <!-- m --><a class="postlink" href="http://www.realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_1974&hg=11&fg=35&lang=en" onclick="window.open(this.href);return false;">http://www.realoem.com/bmw/showparts.do ... 35</a><!-- m -->

      Look here an you'll find the Z=32 gear and the matching further parts. May be this is the only one deliverable, and no old parts with Z=19..
      <!-- m --><a class="postlink" href="http://www.realoem.com/bmw/showparts.do?model=0503&mospid=51751&btnr=11_1818&hg=11&fg=35&lang=en" onclick="window.open(this.href);return false;">http://www.realoem.com/bmw/showparts.do ... 35</a><!-- m -->

      Also you could check the prices and the correctness of the order you did by your dealer. From here, cannot list the parts YOU need, because sometimes there is a mixture of elder and newer parts. If you like to renew the complete pump, please check also the surface of the shaft, where the seal ist placed. If it is used, aou could place the new seal a little bit beneath - so deeper or less deep in his bed..


      Danke Hoechst. From the part numbers you supplied and referring to the part numbers on my invoice, I can clearly see that I was supplied parts for the 32 tooth setup ie post 1989.
      I will go there tomorrow and show them what the Forum can do, which they can't, even though they had my VIN number. Many thanks. Frank


      As the housings appear to be the same, could I fit the new pressed steel rotor (with spacer) and chuck the cast iron rotor? What about gearing? Would I have to fit the 32 tooth shaft and it's matching drive gear as well? Man, is this some learning curve; and I have'nt even got to the hard part yet...the installing of the dreaded mechanical seal!!! Ciao
    • Re: CALLING NED

      Morning.

      The rotor can be replaced without any doubts. But the screw has to be matched to the Z 19 or Z32 gear (BMW names it "shaft" ). I try to tear the guy named " derbonner " up to here, he's one who can talk to the parts.

      Wait a moment ;)
      Schöne Grüsse, Ralf CH
    • Re: CALLING NED

      Frank, you are missing a vital bit of info. The initial arrangement (coarser gears/impeller instead of sheet metal rotor) was as you have indicated, but the newer parts are resulting a BMW modification and I would seriously doubt if you can get the old part. There is info about this on the MotoBins site. The first pump shafts had a nut to tighten the impeller, but that nut (with the threaded end of the shaft) broke off on a regular basis, destroying the pump in the process. The modification was a pump shaft with a threaded bore at the end and a rotor fitted with a bolt. At the same time the impeller and gearwheel changes took place. The new gears will not fit in the old housing, I presume, as (look at Hoechst indeed excellent pictures) the smaller gear now shows a wider housing area around the gear (with a groove machined where the older little gear would have been I guess)
      Further there are two seals in the pump. The oil seal is a standard seal (for the old as well as the new pump) the water seal was modified from a normal seal to a mechanical seal. The new mechanical seal resulted in the use of a different size of spacer.
      Following the above I guess that your shop have delivered you the current parts.

      Now after all that, are you trying to replace an old shaft because it was run in at the water seal or pitted between the seals?? If that's the case, and all other parts are good (and you're desperate/tight ;-), I would have a good look at where the mechanical seal would seat on the old shaft, as this area quite possible is still OK. In that case you can fit the new seal and forget about the pitting, as the new mechanical seal does not land on the shaft in the same area. Further cleaning the shaft up and maybe using a bit of proper filler (DevCon/JBWeld) could smoothen up the area enough (if in way of the seating area) and the mechanical seal closes on the shaft but doesn't run on the shaft; it has its own sealing surface.

      Alternatively buy a second hand new type pump, reseal and fit, that's what I've done.
      Cheers, René

      Greetings from Florida! [Blocked Image: http://i215.photobucket.com/albums/cc2/hfxrzw/Rain.gif]

      Ihre antwort in Deutch wird verstanden
    • Re: CALLING NED

      Thanks ReneZ,
      My shaft is not grooved, neither has it suffered any other serious damage apart from light corrosion between seal . Trouble is, it looked like a mission to measure exactly where the new seals would sit, ie. on or off the corroded area. It now appears that I will have to try to salvage the "old" rotor.
      Your observation that the mech seal does not seal on the shaft itself is noted.
      Regarding the gears, the 32 tooth is much wider come to thinkn of it and wont fit. Funny though, the early and 1980-on housing have the same part number.(???)

      to 1989 1990-on
      Slip Ring Seal 11511704084 11411741870
      Housing 1151146900 1151146900

      Both exploded views show the same (old) rotor but with a different part number.
      What happens if I can no longer get the "old" slip ring seal? Will have to buy a complete 2nd hand pump. Eiissssh!! Thanks again.
    • Re: CALLING NED

      Frank, I think the old and new shaft have the same diameter, so using new seals on an old (good) shaft should be OK. If you clean up the old shaft with a bit of fine sanding paper it should be smooth again. You can measure where the shaft-sealing-part of the mechanical seal will sit with the shaft in the housing and the seal itself. Normally the shaft would corrode between the seals, not in way of the areas on the other side of the seals. The new seal on the shaft will be further up the shaft then the old one (because it now has to accommodate the spring that holds the actual sealing part on the running face of the seal). So if the shaft is clean between the old water seal landing surface and the rotor you should be OK. Minor repairs with plastic steel, if necessary at all, can be successful as the seal on the shaft is a stationary seal, it doesn't run on the shaft. Hope that helps.
      BTW, that little weep hole is a bugger to clean properly.
      Cheers, René

      Greetings from Florida! [Blocked Image: http://i215.photobucket.com/albums/cc2/hfxrzw/Rain.gif]

      Ihre antwort in Deutch wird verstanden