[AT] Three point hitches and Dean's commentary

Dudley Rupert drupert at premier1.net
Sat May 22 11:15:52 PDT 2004


Dean,

Re:  Down pressure on Ford N 3-pts -
I have an 8N out in the Barn that I've kept for several years for a good
friend who lives in an apartment in town.  Unless there is a valve or lever
or pins, etc on it somewhere that we are not aware of it does not have down
pressure on the 3-pt.  Maybe a Ford N expert can nail this down one way or
the other.

Re:  The tractor jack -
George has apparently seen one and I have not but I do have a picture of one
on a Ferguson TEA20.  The picture shows the tractor raised off the ground
with one rear wheel having been removed.  The picture shows the 3-pt lift
arms all the way up.  The jack consists of a U shaped piece of metal of
rough dimensions say 2' on the sides and bottom.  The top sides of the U
jack are attached on the forward bottom of the real axle just inside the
fenders and this U shaped piece of metal is allowed to swing back and forth.
However, it too long to swing under the tractor without hitting the ground
so the bottom of the U lays on the ground pointing toward the front wheels.
Rods/arms connect the bottom of the U to the 3-pt lift arms. The above
description is what I see from looking at the picture.  I am guessing that
the jack works like this:  When the jack is down the 3-pt lift arms are down
and when the 3-pt is raised the tractor is driven forward thus rotating the
jack to a nearly vertically position.  There is also a smaller U shaped jack
attached similarly just forward of the front axle so of course it would seem
that the forward motion of the tractor would likewise rotate the front jack
to a nearly vertically position thus lifting the front end as well.

As I said I only have a picture and my description as to how it works may be
completely wrong.  I am curious if anyone seen one of these jacks in
operation.

Dudley
Snohomish, Washington

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com]On Behalf Of George Willer
Sent: Saturday, May 22, 2004 7:53 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Three point hitches and Dean's commentary


Dean,

You're not dreaming... just mis-understanding.  The Ford jack used lifting
on the arms through a lever to raise the tractor.  I suppose they were handy
for swapping tires, since all 4 wheels were lifted at once.  I guess I
should have brought the one home that came with my 641.

As far as the Cub's usefulness is concerned, all 11 of mine are offended and
refuse to take the blame for the poor performance of yours.  They really are
hard to beat in the hands of a skilled operator who hasn't been skipping his
potatoes and gravy.  It requires some weight on the rear axle for traction!
http://members.toast.net/ImageResizeCache/right%20front_t2004_5_22_9_44_40_q
75_f8_600x450.jpg

George Willer

----- Original Message -----
From: "Dean VP" <deanvp at att.net>
To: "'Antique tractor email discussion group'"
<at at lists.antique-tractor.com>
Sent: Saturday, May 22, 2004 10:24 AM
Subject: RE: [AT] Three point hitches and Dean's commentary


> Bob:
>
> Interesting info on the 40. I failed to mention that there is a single
> spring on the 20 and 30 series tractors to that pulls down on the rock
shaft
> arms but I wouldn't call it a very effective down pressure. The 800 series
> hitches didn't have this spring at all to pull down on the rock shaft
crank
> arms.
>
> I'm not exactly sure how effective this spring is in providing any really
> adequate down pressure on an implement such as a rear blade or something
> similar. A true hydraulic down pressure would be much more useful.
>
> I have owned three 1948 Cubs at one time and am down to one but if there
is
> any tractor that needs the improved traction performance of a three point
> hitch this is the tractor. The rear end of a Cub is really so light that
it
> is ineffective at pulling any kind of load. I got my lawn mower Garden
> Tractor stuck in the mud one spring and the stinking Cub couldn't get it
> out. Had to get a bigger tractor to pull it out.
>
> I recall that Ford sold an accessory that allowed the operator to use the
> three point as a jack. That implies down pressure on the three point. Am I
> dreaming that up?
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> What people can dream, people can do! George W. Bush
>
> www.deerelegacy.com
>
> http://members.cox.net/classicweb/email.htm
>
>
>
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of
> SEITHR at denison.edu
> Sent: Saturday, May 22, 2004 6:49 AM
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] Three point hitches and Dean's commentary
>
> The JD 40 had ENORMOUS springs to create down pressure on the 3-point.
Also
> a
> draft-sensitive feature that could be turned on or off (with a wrench).
>
> The down pressure was enormously useful when using something like a Planet
> Jr.
> seed drill (for truck crops). It ensured positive contact between the
seeder
>
> and the ground. Using the same implement on, say, a small Ford or Ferguson
> ran
> the risk of skipping.
>
> My aftermarket 3-pt hitch on the Farmall Cub of course has pressure up and
> down, but no draft control whatsoever. I imagine trying to use it with a
> pick-up plow would be frustrating. Someday, I hope to fabricate a small
> pick-up disk for it, and I think that would probably work OK.
>
> Note for historical record: The "regular" Cub disk was a cute little 4 1/2
> foot double-acting trailer disk, which was probably pretty good, but
there's
>
> no way I could ever find a place to store such an animal. The Fast-Hitch
> version was a 4 1/2 or 5 foot single-action pick-up unit. Nice, but I
don't
> think many have survived, and I certainly don't have a fast hitch. No, my
> notion is, someday, to buy one of those bargain-type little pick up disks
> you
> find at TSC and other outlets and cut it down to fit the Cub.
>
> That's for when I find some cheap rental land near my place and can
indulge
> my
> fantasy of having a small produce farm. Good luck?
>
> Bob Seith
>
>
> Grant:
>
> Appreciate your comments and none of the two cylinder era three point
> hitches of any variety had power down that I am aware of. I'm not sure of
> the 40 through 430 series tractors but I doubt they had it. I know on some
> tractors the operator could use the three point as a jack. In fact I think
> Ford/Ferguson sold an accessory for this very function. I'm not familiar
> enough with the other manufacturer's products to know which had the power
> down feature. I surely can see where the power down feature would be very
> helpful at times.
>
> The load sensing feature was more important for the smaller tractors such
as
> the Ford/Ferguson and the JD 40. They tended to be light in the rear end
and
> the increase in traction provided by the three point was mandatory. That
> wasn't as critical on the larger Two Cylinder Row Crop tractors since the
> typical weight distribution was 70% to the rear. The early power lifts on
JD
> were either all down or all up. Then the power-trol allowed control of the
> in-between but no real closed loop depth control. That is why gauge wheels
> were required on the implements. Then the 20 Series tractors gave full
three
> point closed loop control and the gauge wheels were not needed as much.
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