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It's nice to see a couple of sideboom posts on here recently which got me thinking, what is/was the largest built? I know that the CAT 587T is currently the largest sideboom that CAT produce however I understand that the older 594H was larger, heavier and overall a much stronger machine. Did Komatsu ever produce a 455 based sideboom? Then I remembered this picture that QuAD posted a while back which was a prototype based on a D11 machine. Does anyone have any other information on it? Did they ever make more than one? CAT 587T  CAT 594H  CAT D11 Sideboom  Rowan.
1:25th scale CAT 375L excavator
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I could easily be mistaken but I believe that is a 84W D10..............
Reasons:-
*Looking at the vintake of the Photos D11 were released till?? 1986.
*Location of the Powertrain filters (LHS is converter charge and RHS is Tranny charge) D11 have them located on RHS of the platform under where you enter the cab.
Awsome picture just the same (I have never seen this before).
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That machine is the 591, i believe 2 built and it is based from the D9L. It has a 5 bogie undercarriage setup based on 84W D10 frames.
The 84W has the tranny hanging out the back same as an 11 Rod.
There was a good post either on DHS of HEF a while back and a good friend from Illinois posted a pic he took over from outside the perimieter fence in Peoria.
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Cheers for the info gents. Gavin, I managed to find the thread from over on HEF. These pictures are courtesy of 992G, Northart and QuAD.    Rowan.
1:25th scale CAT 375L excavator
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That is still quite a big pipelayer. 
-Ethan Collection 8/2/2016For more of the Diorama and my collection: On Facebook or On YouTube
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Great stuff...very informative. 
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There were 2 591's made. As of about 8 years ago, one was scrapped and one was still at the test grounds in Peoria. As I remember, the machine was downsized to a 589. Ken
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Thats awfully big for a pipelayer. But you know what they say, BIGGER IS BETTER
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The year 2009 is supposed to be a slower year for pipeline work and a pickup occurs in 2010. There are so many D8K and D9H machines still kicking around that you will see those pipelayers around for so many years to come.
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Word I got there is only one 591 that was built and it went to Russia where it got "lost"....
Wonder if any European people have pics or info on some 120ton units that Sicim, Siapem, or Bonatti might on that are modified Komatsu D455's or a large Superior built machine??
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Ace797 wrote:Word I got there is only one 591 that was built and it went to Russia where it got "lost"....
Wonder if any European people have pics or info on some 120ton units that Sicim, Siapem, or Bonatti might on that are modified Komatsu D455's or a large Superior built machine?? No, I saw it in Peoria not too long ago. There were two 591's built. One was cut up and the other one was changed to a 589. I new two operators that worked at the Demonstration Area and the Proving Grounds. The earlier Joal model was a 591, and later changed to a 589 Ken
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There was a Komatsu 355 and a Fiat Allis 120 sideboom also. I will post a couple of pictures later Ken
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There were a bunch made out of Allis-Chalmers HD-41's floating around the world as well. I don't know if they were build by Allis-Chalmers or converted by someone else. For years there was a big yard full of them on the north side of I-15, a few miles east of Mesquite Nevada.
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Henuset Pipelines of Calgary made some HD41's and some more may have been made elsewhere and those Henuset units I am not sure of the exact owner now. The one is one You-Tube carrying a 94 with no weights around.
Wish I would have got a pic off an Italian I was around a year ago on his phone that had some very large boom made by superior I believe it was.
As for the 591, 1 or 2 built who knows. That is just a story from a good source that maybe had the book in his hands of that project for a brief bit of late. Just dug this old post out of DHS as I was digging around for info that might be around or some people know of.
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Ace797 wrote:Henuset Pipelines of Calgary made some HD41's and some more may have been made elsewhere and those Henuset units I am not sure of the exact owner now. The one is one You-Tube carrying a 94 with no weights around.
The ones in Nevada that I saw all had a little ROPS looking canopy on them. http://youtu.be/xwghZoeFs04
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todd s wrote:Ace797 wrote:Henuset Pipelines of Calgary made some HD41's and some more may have been made elsewhere and those Henuset units I am not sure of the exact owner now. The one is one You-Tube carrying a 94 with no weights around.
The ones in Nevada that I saw all had a little ROPS looking canopy on them. http://youtu.be/xwghZoeFs04 That's bada$$!
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What's the advantage of very large pipelayers? I understand that bigger means stronger, and in theory you could make a sideboom out of a Komatsu D575. But is it practical?
Remko Ocean Traders Scale Models Facebook Group
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Remko, The only reason for those bigger machines was for special projects... Very heavy wall high pressure pipe, long, heavy sections for crossings, speed of installation for heavy, long sections that had to be done very quickly. Most all the machines bigger than the 594 size were purpose built. Anything bigger in cross country pipeline work would not have been practical in many locations. The weight, transport issues, etc. The real reasons for the 594 size were the larger pipe on large spreads... they were not that big a jump over the tried and true 583, so they were still practical. On train wreck work, I only know of a couple outfits "RJ Corman" that used a few of them as road transportable units and maybe one railroad that had them pre-loaded on flatcars for wreck work.
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Plus every so often you see big side booms in some of the oddest places. Like in a ship yard, a steel mill or in a big mine moving conveyors around for a BWE.
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Thanks. I thought it might be something like that. I've also seen a Komatsu WA500 wheel loader with a sideboom. Looks interesting, but I don't know if it's practical though... http://www.sidebooms.com/products/generic_m33r.phpAlso, what's the general consensus regarding the Excavator based pipelayers? I think I have some photo's of sidebooms for a BWE. I'll see if I can find them and post them here.
Remko Ocean Traders Scale Models Facebook Group
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