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Subject: POSITIONING OF THE NAA FEELER GAUGE???

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ZANE    Posted 02-03-2017 at 09:22:05 [URL] [DELETE]        [Reply] [No Email]  
  • POSITIONING OF THE NAA FEELER GAUGE???
  • I have come up with a question about the positioning of the feeler gauge when adjusting the lift on the NAA. An article that was posted on this site
    (http://www.ntractorclub.com/howtos/pdfs/NAA-Hyd-Ctrl-Adjustment.pdf) states and shows the feeler gauge against the cover plate. I have always thought that the feeler gauge should be in the gap in the cover and on the ram cylinder casting. Can anybody clear up this question with a reference to some Ford published instructions???

    Zane

    Tim Daley(MI)    Posted 02-04-2017 at 16:52:35 [URL] [DELETE]        [Reply] [No Email]  
  • LINK
  • ...this is the LINK from our HOW-TO's...

    Cal Poulsen [IA\]    Posted 02-03-2017 at 16:32:04 [URL] [DELETE]        [Reply] [Email]  
  • Re: POSITIONING OF THE NAA FEELER GAUGE???
  • To set Hyd. control adj. you need Nuday tools # N-503 arm and N-502-B thickness gage.
    I have a set of them.

    ZANE    Posted 02-06-2017 at 15:38:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: POSITIONING OF THE NAA FEELER GAUGE???
  • The illustration on page 7 seems to be a little misleading in that the lift arms are not in a line with the casting gasket mounting plane and the holes in the ends of the lift arms????

    JMOR    Posted 02-04-2017 at 10:10:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: POSITIONING OF THE NAA FEELER GAUGE???
  • Or a piece of bar stock machined or ground to same thickness of N-502-A and N-502-B ( 0.25 and .1875 +/- 0.010 inch), per Ford NAA-NAB FO-79 manual, paragraph 281B. Both this manual and the NUDAY instruction sheets show the thickness gauges being inserted between valve shoulder and the bolt on plate (not the casting).
    Zane, you state that , "my information states that draft should be 0.155 and position should be 0.24". You asked for "references to Ford publications". I have provided that above and now ask you for a reference for the 0.155 and 0.24 numbers? Thank you.

    ZANE    Posted 02-03-2017 at 09:27:09 [URL] [DELETE]        [Reply] [No Email]  
  • Re: POSITIONING OF THE NAA FEELER GAUGE???
  • It also states to use a 3/16" and a 1/4" square stock for the feeler gauge.

    My information states that the Draft gauge should be .155 and the Position gauge shoul be .240 . I know that the previously mentioned size is close but in this case close ain't good enough.

    Zane

    Tim Daley(MI)    Posted 02-03-2017 at 13:19:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: POSITIONING OF THE NAA FEELER GAUGE???
  • Good questions, Zane. The 1/4" dimension at .24 is close but the .155" dimension is a whole 1/32" off -3/16" = .187". That seems way too much to be an acceptable precision machined tolerance. A +/- .010" is a common dimension tolerance, but you don't see a thirty-thou tolerance on machined dimensions, maybe on castings, but not on precision machined ones...

    Tim Daley(MI)

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