[AT] was 8N Ford, now add-on trannys

[Herbert Metz]

Dudley
Were these extra trannys for IHC M's & H's concentrated in any geographic
area or for some particular use?
Not applicable for 5th gear is understandable; 16 to 18 MPHr   x   2   can
be dangerous on any farm tractor..
Herb

> [Original Message]
> From: <drupert at seanet.com>
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Date: 12/22/2009 4:10:49 PM
> Subject: Re: [AT] 8N Ford
>
> > Since I am still trying to stay off of my #$%& knee I am going to go
> > look at an 8N Ford Tuesday. Not been ran in a "couple of years". Has
> > very good rear rubber, Sherman hi-lo, pictures look pretty good, looks
> > like good old TSC super fading paint. Would not start, not stuck.
> > -
> > As I look at 9/2/8N's I have been struck by just how many of them have
> > the Sherman's in them. Most are just the step-up's especially in the
> > 9N's. I've seen mostly Hupps in the Fergies around here.
> > It is also amazing just how many of the N's have a mangled grill.
> > Maybe their brakes were not kept up good enough. :-)
> > I have seen a whole herd of F-20's with "road gears" Behlen I think.
> > Are there many other tractors where aftermarket overdrives were used?
> > I have often seen M&W gear sets for Farmall M series but they were to
> > improve 3rd and 4th gear but didn't change 5th.
> >
> >I don't know anything about the Behlen overdrive for the F series but I
> know Heisler made them.  They made two overdrives for the F-12 and two
> for the F-14.  One offering had a 2.1 to 1 ratio and the other a 2.32 to
> 1.
>
> They made three overdrives for the F-20, three for the Regular and one for
> the F-30.  For the Regular and F-20, one Overdrive offering had a 1.99 to
> 1 ratio, one had a 2.1 to 1 ratio and one had a 2.32 to 1 ratio.  The F-30
> Overdrive had the 1.99 to 1 ratio.
>
> The Data Book I have lists 4th Gear for the F-20 at 3.75 MPH ... I guess
> even with the fastest overdrive this means the top speed was barely eight
> and a half  MPH (probably want to have rubber tires for that).
>
> Heisler also made the 9-speed gear set for the H & M.  As with the M&W
> these gear sets offered four additional gears between the "standard" 4th
> and 5th gears.  This was accomplished by installing an overdrive on the
> Counter Rotating Shaft.  The overdrive ratio was appropxiamately 2 to 1. 
> Thus, when out of overdrive, the output of the first four gears was
> unchanged but when in overdrive their output was a hair more than doubled
> -for an M this meant the additional speeds of approxiametely 6, 7.5, 9 and
> 11 MPH.
>
> Dudley
> Snohomish, Washington>
> > --
>
> > --
> > Have you hugged your horses today?
> >
> > Francis Robinson
> > aka "farmer"
> > Central Indiana USA
> > robinson46176 at gmail.com
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> >
>
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