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36169Re: [MILL_DRILL] Re: New to this group

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  • Bob Estabrook
    Aug 27, 2014
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      Thanks Mike,
      I did change the oil in the ZAY. The manual calls for automotive motor oil so I used 20w50 mineral oil with a high ZDDP content. That new oil is much thinner that the dirty gear oil that came out of the machine. The machine is smooth and not binding in any of the gears when turned by hand.

      The surging is something I haven't experienced with electric motors in the past. It's like it starts to run, then cuts out and the starts to run again - repeat. Unfortunately, the motor is 115V only so the current draw is going to be pretty high. I am running a 20 amp breaker which is marginal for the 1.5 amp motor. I previously ran a 15 amp and that wouldn't hold it. My house wiring won't support more current draw in that line.

      Bob
      --------------------------------------------
      On Wed, 8/27/14, mike@... [MILL_DRILL] <MILL_DRILL@yahoogroups.com> wrote:

      Subject: [MILL_DRILL] Re: New to this group
      To: MILL_DRILL@yahoogroups.com
      Date: Wednesday, August 27, 2014, 6:05 AM


       









      Bob, you could also have a look at your oil. If it
      looks like "gear lube" (90 weight, or the like),
      try replacing it with an ISO 68 like Mobil's DTE. I have
      a Rong Fu JFC45N2F. When I first got it, I flushed out the
      installed oil with a few changes of diesel (running it for a
      bit to swish it around between changes) and re-filled it
      with the Mobil. It has been working fine for many years now.
      Too heavy of an oil creates undue drag in the gearbox,
      especially cold. A few posts ago, someone mentioned foaming
      with ISO 68, I have never had that problem. Maybe the
      flushing cleared out the old oil that may not mix properly
      with the Mobil. The oil debate has been going around on the
      list for years. Judge for yourself, I'm personally
      convinced that automotive type gear oil is not the hot lick
      (90, 85/140, 80/90 and the like). The Mobil is clear and
      much lighter. ISO 68 is recommended in my manual. My turbine
      engine uses a similar oil in it's gearbox. Good luck,
      Mike









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