transmission theory ?s

Posted by Pa. Pete on June 10, 2004 at 15:18:51 from (204.97.243.176):

I bought a Super A, my first tractor.

I'm looking at a side-sectional view of the transmission and differential, in my IH 'shop manual'. I can easily see how 1st through 4th gear are engaged, as they are slid forward or backwards on the splined-shaft, to engage with their respective counterparts on the countershaft. The apparently-unslideable reverse gear looks like it remains constantly meshed with a gear called the 'oiler-gear'.
My questions:
1) As the reverse-gear is on the same splined-shaft as the forward-gears, how is the reverse-rotation imparted from this gear to the bevel pinion to make the tractor go backwards? What is the gearshift lever engaging, to accomplish this?
2) What is the purpose of the oiler-gear?
3) The oiler-gear is considerably more slender than the reverse gear that drives it. Why so slender, if the oiler-gear is being used to drive the countershaft?

Follow Ups:

• Re: transmission theory ?s lee 16:53:09 06/10/04 (4)
  • Re: Re: transmission theory ?s Pa. Pete 17:41:14 06/10/04 (3)
    • Re: Re: Re: transmission theory ?s lee 19:37:53 06/10/04 (0)
    • Re: Re: Re: transmission theory ?s Allan in NE 18:32:27 06/10/04 (1)
      • Re: Re: Re: Re: transmission theory ?s Pa. Pete 20:39:08 06/10/04 (0)

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