Alternator putting out 17v ?

Discussion in 'Mech Tech' started by crossy2112, Oct 20, 2017.

  1. There's only 2 components in them as you'll have seen. One is a small cartridge type bulb like in your dome light. Later versions may be a wire wound resistor. The other is a zener diode. Maplin sells these for about 45p and we know Maplin aren't that cheap these days, so they probably pay tuppence each for them.
     
    snotty likes this.
  2. davidoft

    davidoft Sponsor

    Yes I’ve got a few if you still need one :)
     
  3. davidoft

    davidoft Sponsor

  4. The cheapo ones have a 27R 6W wirewound in, which is just about enough if the sender lead falls off, plus two zeners wired in parallel, which isn't particularly good practice :rolleyes:. If you hunted around, you could get them for a couple of dollars from China: a lot less than £30.

    I've become a great fan of the steam-powered thermal strip type :thumbsup:...
     
  5. crossy2112

    crossy2112 Supporter

    I checked out the Chinese ones but decided on 'reputable company' :oops:
     
    snotty likes this.
  6. crossy2112

    crossy2112 Supporter

    Have you got a 70A one?
     
  7. davidoft

    davidoft Sponsor

    Alternator or regulator? Or both ?
     
  8. crossy2112

    crossy2112 Supporter

    Alternator
     
  9. davidoft

    davidoft Sponsor

    Fairly certain i do, will take a look
     
    theBusmonkey likes this.
  10. The Heritage ones do have the VW part number stamped on them by a Chinese four-year-old. Surely that's worth another £25 :rolleyes:?
     
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  11. Suss

    Suss Supporter

    Apparently, according to "the whispers" on here he will deliver it to sunny Barnsley for food!:rolleyes:
    I bet if you give him a go in the Barnsley red fluffy hoodie he'd fit the alternator too!!!:thumbsup:
     
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  12. crossy2112

    crossy2112 Supporter

    Here's hopeing :)
     
  13. nicktuft

    nicktuft Supporter

    Joking apart the history could be interesting. I saw that the alternator was 021 903 021 12v 55 amp and wondered how it matched the engine. Noticing that the engine might have been ex-nato I was curious.
     
    snotty likes this.
  14. crossy2112

    crossy2112 Supporter

    I will have a look tmoro. Where should the engine number be?
     
    nicktuft likes this.
  15. 77 Westy

    77 Westy Supporter

    Below the breather tower, behind the fan housing.
     
  16. nicktuft

    nicktuft Supporter

    Fan housing hopefully if not there then it should be on the shank/shoulder by the oil breather filler... nice one thanks for having a look.
     
  17. crossy2112

    crossy2112 Supporter

    You mean the oil filler ?
     
    nicktuft likes this.
  18. nicktuft

    nicktuft Supporter

    Yes.......any old numbers would be of interest.
     
    snotty likes this.
  19. Not Col Mustard in the Library?
     
    Suss likes this.
  20. More like Professor Plum with the lead pipe


    Sent from my iPhone using Tapatalk
     
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