Well I finally got rid of the 'portable' gantry I built 30 years ago; it ju
st got to the point where I'm not physically able to break it down and move
it around very safely any more. I built a couple of smaller widgets that I
can put on my little Kubota tractor. The first one is a real kluge and wor
ks well enough to move trailers around the meadow but the second, a jib cra
ne, is a bit of a stab in the dark and I'd appreciate comments on the desig
n. It's not intended to pull a big engine out of a truck or anything like t
hat, but it should be capable of lifting the steam engine or boiler out of
my boat. https://www.flickr.com/photos/steamboat_ed/sets/72157655170041438
On 07/28/2015 12:19 PM, SteamboatEd Haas wrote:
Just guessing, but a first shot approximation...
From the size of the tractor, and giving benefit that the 3-pt is Cat
1, not Cat 0, I'm guesstimating by measuring from the pictures that the
arm is 1", 1/8"T tubing and roughly 16" long from the gusset to the lift
point. If so, from the following calculator, the bending stress
approach 30k psi for a load of 200 lb. That is, of course, for a
fully-supported end and has no compensation for the point loading effect
of the narrow gusset at the center of the tubing as the load
concentrator. One thing I'd suggest would be to add outside plates
there so there isn't just the one point in the middle but support at the
edges of the tubing instead. And, of course, if the length is longer
it's directly proportional if the tubing dimensions are heavier/lighter,
they have a effect by the fourth power of the difference between
inner/outer dimensions from the geometric moment of inertia of hollow tube.
I didn't try to estimate the lifting moment on the tractor to the rear
axle to see how much weight you need minimum to hold it down but the
seat is directly over the rear axle so your weight isn't helping much at
all in that regards.
That may be enough capacity, altho as another mentioned without any
lateral bracing whatever I'd worry quite a lot about it collapsing
sideways when it's subjected to some side loading from a bump or a
slight tilt from vertical (owing to ground slope, perhaps). I also
didn't do any calculation on the compression of the lower extension arm
against buckling but I suspect it's better than the above (but that's
purely speculative just based on the visuals).
It is cute, though; I've thought of doing something similar for the
utility tractor here altho it's a fair amount larger (~30 hp green).
And, of course, that's static loading only; the real kicker on stuff for
usage like this is the impact loads that are applied when the tractor
hits a bump or the like; those can be several times the static loading
and without any springs or other absorbing mechanism, it all has to be
taken up by the "beef" of the structure.
An example is the little 3-pt sprayer (55 gal) capacity...it was
commercial from Schaben but didn't take but one or two summers over the
ground around the feedlots and machinery parking areas before the bounce
caused the boom arm folding connectors to crack as well as the 6" wide
1/8"T rolled main support under the tank started to tear. I added a
1-1/2" by 5/32T angle; it still wasn't enough to take more than another
couple of years. I've got to beef it up again further this year and
will at that point also find some heavy compression springs to set the
tank on to relieve some of the impact load from being transmitted
directly to the frame.
While you'll never move stuff around with the hook like one covers
ground at a steady pace while spraying, it's inevitable you _will_ find
a hole or somesuch... :)
Only picture of the precise design could find quickly...it's small but
you can see how they just rolled the platform sheet to make a square
edge...that tore beginning between the two uprights holding the valve.
Hadn't looked before but current seem to have been modified to use a
(looks like perhaps 2-1/2"?) square beam between the two sideplates
instead; much beefier...
I am not sure of the exact size of the pictured tractor, but my rather small
(33HP) 4wd John Deere has a Cat 2. A commercial farming buddy of mine
looked at it one day and said it was the smallest cat 2 setup he had ever
seen, but it was definitely cat 2.
Cat 2 is 1-1/8" D lift pin is the definitive way to tell. (Cat 0 ->
5/8" and Cat 1 -> 7/8"). While those _could_ be, perhaps, just doesn't
look like it and it would be more than just a little unusual on such a
small tractor. That can't be but in the upper teens to low 20s on such
a small chassis.
I figured OP would be back and tell me where I was wrong altho I noticed
today in rechecking the photos on the first page of his notebook it
might be 1-1/4" X 1/8" tubing...if I get a little time this evening I'll
maybe try to recheck the guesses...
The JD 955 here is about 30 HP, MFWD (it's so old I don't remember
precisely) and is Cat 1. I don't know at what point Deere goes Cat 2
standard; I suppose it's probably possible to order a higher level than
standard even on the utilities, or somebody could have swapped out pins
or arms, even...
The new "4 Family" run from 43 to 66 HP and are all Cat 1. OTOH, the 5E
series starts at about 50 hp up and are Cat 2 so it also depends on the
series. But, at 33 hp I think it's unusual for sure.
Interesting. My John Deer 4wd series 1 is a Cat 1. The pins that are
used to pick up with are maybe 7/8 and then there is a sleeve. Maybe it
is 5/8 plus 1/8" making 7/8 tubing around the pin that is hard. I
suspect the tubing is the consumable while the pin is the strength that
pulls. I thought it were larger myself.
I use 48" wide Power Tiller, 56" wide hog mower, 48" fine cut and 48"
front end loader.
The large hooks take the tubing diameter while the pin is the implement
Handy tool that is for sure. When the grass gets waist high or more due
to constant rain, the Deer just drives through and cuts.
At our age, we use it to tote heavy boxes and materials around the property.
On 7/30/2015 5:47 PM, dpb wrote:
JD is putting pins that are hard. The shells they sell in the parts
room are for expansion of the pin size but take the nicks and sand crap
when moving or jerking the load on something you snagged upon. The
implements are a mixture of Deer and Frontier and both manuals say Cat
1. So does the website. So I think the sleeve is a consumable part.
Long learned that a bunged up scratched pin might not slide through a
hole unless ground down. While the Sleeve is swapped with another and
away you go.
On 7/30/2015 11:35 PM, dpb wrote:
Of course the pins are hard; if Frontier or some of the utility stuff is
now coming with Cat 0 pins and a bushing that's something I've never
seen...have similar setup on the utility here with a box blade, garden
tiller, mower, post hole digger, sprayer, etc., etc., and they're all
full-size 7/8" pins. It's all at least 10 yr old or older, however, so
if somebody has come up with a clever idea, that's a possibility I
suppose. I've never had any issue with any of 'em in all that time.
For everything else except the above little utility stuff, everything
has quick-hitch attachment anyway; one never need slide a pin thru (and
you'd never manage with a 12-row planter or such on full-size equipment,
anyway, it's simply too heavy to budge to do so).
That is a taller larger large field unit than mine. A Row tractor.
Here is the stripped down version - missing the front end loader and
the heavy mower on the rear. It could have a bucket on the back as
well. I have the Heavy powered unit with more Hydraulics so I can add
options easily as I have.
I'm under 10 acres so I don't need a big one. Wish I had a 2_Series
unit but didn't know at the time. It is much heaver and can really work.
On 7/31/2015 3:00 PM, dpb wrote:
We have 7 quarters (a "quarter" is one-fourth a section or 160A) and
rent another 6 to farm a total of 13 quarters dryland mostly wheat and
milo in far SW KS...that picture's similar to the smaller row crop at
about 180 drawbar HP. It's still _very_ small compared to the larger
operators with their 20+ corn planters and all, but they're not 3-pt
On acreage we're about average for the area in size but nothing at all
compared to some that are 3-4X the size of operation but that's twice
the size were when was growing up in the 60s and were probably in top
third back then.
PS I did a few measurements on the 3-point hitch: the lower arms can pass
a 1 in. bolt. The upper fixed point uses a 5/8 in. pin. Not sure of whethe
r that makes it class 0 or class 1. I can mount a 48 in. mower but to do so
I have to position the lower arms inside, rather than outside the mower at
tachment points so I have to reverse the mounting pins. No problem lifting
it with the hydraulics tho and the PTO has run the mower just fine for a de
That is a non-standard rig as you surmised, per the ISO Standard (730-1,
1994) which contains the definitive definition for consistency, Cat 0 is
5/8" for both lift and link pins while Class 1 is 7/8" lift and 3/4"
link pin. The 1" lift point opening doesn't match anything precisely;
Cat 2 is 1-1/8" for the lift pin.
The midpoint spacing for the lift arms is 20, 26, and 32", for Cat 0, 1,
One last note...perhaps for the lighter stuff they have gone to bushings
so the can be used with a Cat 0 tractor w/o replacing the pins; again if
so I've never noticed. Not sure if the Deere dealer has anything that
small in stock to look at; when I'm out next time I'll look around.
Even as a kid I never could understand why Dad never would get a small
utility for around the place; as noted, everything here I got with the
utility after we came back to the farm after he passed 15 yr or so ago
by now. The closest we had back then was an old (1930's vintage
Caterpillar 22 (22 drawbar hp) left from the period when granddad had a
bunch of them they used with a 3-row pull-type lister for all the row
crops that had a stiff-frame bucket. It was too low to load a truck
with but could move a little dirt or the like. Of course, being tracked
it left a heckuva mess afterwards on the ground. Neighbors at the time
had little Ford 8N that was just so cute and handy...later on (early
60s, had an Allis Chalmers D-17 that eventually bought a bucket for --
it was a nice loader tractor altho still just barely enough height to
get over the side of a 2T grain truck side. For it he also eventually
bought a 7-ft Fordson bush hog, but without a live PTO it was a real
trick maneuvering it around close quarters without it driving you
instead of vice versa...but that's what (along with a 15-ft solid shaft
flail mower) is what he made do with and was what was here when we got
I bought the JD 955 (had to go back to the Wichita area to find one;
there's just almost no small utility stuff out here and what there is
doesn't often come up for resale) and most of the attachments within a
year or two after we came back...they happened to have a 6-ft belly
finish mower that fit and a 66" tiller (Land Pride) at the time so took
them along w/ the tractor. It already had the bucket as it was a
tradein from a landscaping outfit; been pretty heavily abused
cosmetically but has been solid mechanically for another 12-13 yr so was
a good deal. Would like to have been a little larger but we needed to
drag a bunch of dirt away from the house to regrade as over the years
including the Dust Bowl of the '30s it had gotten to where the house was
lower than the yard all around so nothing drained (on those rare
occasions when it does actually rain here :) ) so I got the smaller for
the clearance under the trees and around "stuff" in the yard to do that.
It worked nicely with the tiller and 6-ft box blade to drag to a pile
and then use the larger loader on the old JD 4440 to load the truck and
haul. For the larger areas around the feedlots and machinery parking
areas I also bought a new Rhino 15-ft batwing mower to use around the
place and relegate the flail to pasture cleanup. It's much more
maneuverable and does a cleaner job and can get close enough to fences
and outbuildings that then the belly mower on the 955 can clean up
pretty well. I'd like to find a 3-pt sickle sidebar to be able to slide
under the cedar windbreaks and along the feedlot fences between posts
but they're also very rare out here. I found a new one a few years
after the move but it was back eastern part of the state and I was on
way back to TN before we'd gotten the house there sold so didn't close
the deal and when got back somebody else had taken it...didn't know that
Deere had quit making 'em at the time and there were no more other than
Anyway, I suppose that the difference is both age and that all the stuff
here is a little larger on the pins used but I've never seen an actual
pin boogered to the point it would be any problem to use so I still
think it's a case of simply using a Cat 0 pin from the factory to make
things universal w/o having to swap rather than that the sleeves are
really considered a "consumable"--altho I'll grant one's a lot more
likely to mung one of them up than the pin itself which sorta' makes
them that... :)
Anyway, "far too much information" and I needs to go get busy and I'll
shut up and go away for the time being...altho I may try to post some
actual pictures somewhere; this year things look pretty good as we've
finally(!!!) had some decent rains after the previous five years of
severe drought--although we're now getting to where we need another for
the row crops (milo, primarily with some other feed sorghums) to make a
crop they're going to have to have at least one more good rain.
Well, had to go out this AM for spare parts for combine to get ready for
milo...hadn't driven down the equipment line for the small stuff before.
Anyway, there were 3 or 4 Frontier 3-pt mowers and a blade or two and
a few other odds 'n ends. Other than the one smallest mower (48") which
did have Cat 0 pins, all the rest were Cat 1 lift pins.
I'm still thinking that the previous surmise is correct based on that
Since I'm a deer guy and never saw a Frontier product until I talked to
my sales guy and asked him the price on a xxx and delivery time...
The Deer stuff is 1 1/8 heavy steel. While the other parts could be
used on multiple tractor grades by changing bolt positions and maybe the
We once had 3 farms in Indiana but two generations ago they were
swindled away from the family. My dad grew up on one of them worked all
three and drove a team of 8 Morgans. AKA Hay Burners big time.
My wife has an x300 deer - a robust factory made deer mower. The deers
sold at Home Depot and places are made overseas.
She got nose into a drainage ditch mowing and I had to lift up the front
and she drove it out without front wheels. Backing up. She had run
Mine weighs more than a car and is handy. Just no use for large row
The brothers over at the Tree service dealer - have Big Deers! They
ship wheels on flatbeds with escorts! Then there is the Industrial
Deer across town that has the big digging machines...
The Farm tractor Deer dealer is in the next large town going North or
another (same owner) West about 40-50 miles away.
This is a Lumber / lumber product region. Power Poles and all.
On 8/1/2015 11:56 AM, dpb wrote:
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