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Subject: Tachometer

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Mike    Posted 12-30-2017 at 08:47:34 [URL] [DELETE]        [Reply] [Email]  
  • Tachometer
  • Hi, recently installed a new regulator and generator. My old setting must have burnt up my armateur in the Genny. After careful install and wiring, I noticed my amp gauge go crazy when I first fired it up then calmed down and was reading normally. Everything runs fine and it appears to be holding a charge. Question, I noticed my tach jumped a digit and instead of reading 50 hours, it now says 150. Anyone ever have this happen?

    Rustyal    Posted 12-30-2017 at 14:20:32 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Tachometer
  • The amp meter may read a little high at first.

    Mike    Posted 12-30-2017 at 12:17:37 [URL] [DELETE]        [Reply] [Email]  
  • Re: Tachometer
  • Sorry. 1953 jubilee. 6 volt using a rebuilt Genny. The only "new" stuff are things like the regulator, distributer, electronic ignition etc. Starter and vane pump are rebuilt OE too. I thought the tach ran off the vane pump based on cam shaft revolutions, right?

    TheOldHokie    Posted 12-30-2017 at 13:49:10 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Tachometer
  • Proof meter is a mechanical drive off the hydraulic pump drive gear. Hour meter is a mechanical counter and cold/stiff innards probably pulled the adjoining digit wheel over one count. AFAIK parts are NLA and nobody rebuilds the old N-series vane pumps.


    36 coupe    Posted 12-31-2017 at 09:35:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Tachometer
  • The tacho meter Can get noisy in cold weather.The cable is not the problem.The bushing never gets oiled.My tach jumped around so bad the pointer broke off.You have to take the tach out and get a small amount of light oil on the bushing.Moving thr cable will stop the noise at times.I still have the tail end of the pointer on my tach.Taking the drive cable out in cold weather is best.

    Mike    Posted 12-30-2017 at 15:03:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Tachometer
  • Thank you everyone! My mechanic picked up a few original replacement part kits for the vane pump. It was expensive but I trust my source for whatever that is worth. I know they are not as good as the Piston conversion but I wanted original.

    Anyways, back to plowing. Take care

    Rustyal    Posted 12-31-2017 at 10:41:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Tachometer
  • Your pump should last a while when you get it rebuilt. Most people just donít want to mess with that style.

    Tim Daley(MI)    Posted 12-30-2017 at 10:41:35 [URL] [DELETE]        [Reply] [Email]  
  • Re: Tachometer
  • Mike -
    First bit of advice is to always use the original parts whenever possible on these old N's. New stuff made today is pretty much junk. The original parts were designed and made to be rebuilt over and over. A good starter/alternator shop can rebuild generators and starters as well as test them and your ammeter, VR, and battery as well. Carbs and distributors can be rebuilt by yourself or some of us here. The PROOFMETER is not an electrical device, it is mechanical so installing a new generator has nothing to do with it. I suspect you have something boogered up in your wiring. here's a LINK to our HOW-TO's forum for a document created by Jesse Morris, "WIRING PICTOGRAMS by JMOR" which has very possible CORRECT way to wire these old N's. You don't say if you have a 6-volt or a 12-volt battery. If 6-volt, it should be wired positive ground. If 12-volt, you should be using an alternator, not a generator. Since you have already purchased a new generator, if you wish to get rid of your old one, my email is open.
    Tim Daley(MI)

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