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

[drupert at seanet.com]

Herb,

That's a good question but I don't know the answer.  In the past fifteen
years or so I've averaged maybe four tractor shows a year (the same shows)
and have not seen a single H or M with a 9-speed transmission out here in
the Northwest.  On the other hand during that same time period I've made
in excess of twenty trips back to the Midwest where I've seen probably a
dozen to fifteen Farmalls with a 9-speed.  I am not sure this proves
anything other than there are likely more 9-speeds in the Midwest but also
more H's and M's as well.

One thing I recall reading in the M&W literature is that it was not
uncommon for well worked H's and M's to develop Transmission Main Shaft
Pilot Bearing failure due to the sling patterns in the splash lubricated
unit.  M&W suggested in their sales literature that if the transmission
was opened to solve this problem then the additional cost to install their
gear set would not be all that much.  I don't know but if this particular
failure mode did result in considerable 9-speed gear set sales and if the
Midwest worked their Farmalls particularly hard then this may be a partial
explanation as to why they may have a higher concentration of 9-speed's
... but I'm now starting to leave facts and getting into the weeds of
speculation.

Dudley
Snohomish, Washington>



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
>> > _______________________________________________
>> > AT mailing list
>> > http://www.antique-tractor.com/mailman/listinfo/at
>> >
>>
>>
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