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Trailer 4 (Lowboy Trailer)
Detachable gooseneck lowboy trailer in scale 1:17,5 with PF and lights. It features solid axle suspension, parkingbrake, liftable rear axle and detachable gooseneck to load and unload trailer easily.
About this creation

The Internet is my main source on getting information for my models and details on it. In this specific case I also got a lot of help from a friend of mine Tom Parsons. This very friendly person lives in the USA and works at this CAT dealership and provides me with loads and loads of information. My first attempt on building a lowboy trailer was about two years ago, but at that time I didn't manage to do so. Mainly because of the weakness of the deck itself I gave up.

Once there was another email from Tom with great pictures, but this time there was this lowboy. I noticed directly that it has chassis beams that arise from its deck so the chassis beams are thicker then the deck and I knew directly this solves my strength problem. The higher the beams the stronger they are. Notice that in none of the pictures shown here supports are used, the trailer carries the CAT 318C all by itself. If you like to check out the topic on the truck that goes with it as well please click here to see it here on MOCpages.
For more pictures on this model click this to check out my Brickshelf Gallery.







With this type of lowboy trailer the gooseneck is removed to load and unload the deck. Because the front part of the trailer rests on the surface the truck with the gooseneck still attached can drive off. The ramps are lowered and the load, in this case my CAT 318C excavator can enter to deck. After loading the truck backs up again and attaches the gooseneck to the trailer again. With a support that rests on the trucks frame the gooseneck can be lowered of lifted to make sure it comes in place. One last action is to raise the deck and lift the support and the load can be hauled anywhere...

First gooseneck attempt holds two pneumatic cylinders to raise and lower the deck. Luckily TLG had invented the “Linear Actuator ” because even though pneumatic cylinders are strong enough, since air can be compressed it did not suite the job at all. Now with the LA a new problem arise, it was simply not strong enough and a M motor needs to be installed too.

Installing two LA would sure be a solution, but that is not what I wanted basically because there is no room. Installing two M motors, one LA and a IR Receiver in such a small creation was already hard enough. By creating leverage, the length of the movement was simply cut half, enough power was generated to raise the deck. Even with the CAT 318C weighing 1,94 kg / 4.3 lbs it holds just fine. Yes it does drain the batteries, but hey that's OK with me...recharge and done...

I always wondered how on earth the detached gooseneck keeps ground clearance and does not drop to the surface while moving away from the trailer. After I asked this to Tom he gently explained it to me and it was pretty obvious: a support on the gooseneck that rests on the trucks chassis, but till then I did not have a clue at all... :-) How to move on now another option had to be squeezed in into the already not that large gooseneck. A worm gear solution works best which is powered by a M motor via a 1:3 ratio rubber belt “gear” down. It took me quite a while to put it all in there, but after some thinking and puzzling I managed to get it all in place.

Searching the web to find info no this project I bumped into these so called jeeps that often goes with a lowboy trailer. A jeep is basically a simple chassis with a couple of more axles and a fifth wheel. The purpose is to spread load over more axles, this way the weight per axles is suppressed. In the design process I choose to build one with three axles because I wanted it to be able to “stand” on its own without the use of a landing gear simply because there is no room to install one.

It is quite small, but never the less it holds quite some functions. Because the gooseneck needs a power output on the truck it needs one on the jeep too. It is simply a Power Functions Extension Wire (length 50cm) running from the front of the jeep to where the fifth wheel is located. At this point it is attached to the deck from where the Power Functions Light Unit begins which runs to the tail part. When the lowboy is hooked up the electric connector of the gooseneck can be plugged in and power is supplied to operate. All three axles of the jeep have solid axle suspension.







After the job is done and you as a driver are about to turn back home, this is a typical way to bring it all back. Just load the jeep on the lowboy, secure it and you're out of there...



Comments

 I made it 
  February 19, 2014
Quoting Cameron Petty If you get intructions would you be able to email them to me too please that would be great This is my email cameron.petty@hotmail.com
The instructions will be available as all my instructions at mocplans.com, so I will not email them to anyone... :-) Both here and on YouTube the availability will be announced... So please keep track on what I do and if you like to, subscribe to YouTube to be notified! Thanks for your interest!!!
  February 18, 2014
If you get intructions would you be able to email them to me too please that would be great This is my email cameron.petty@hotmail.com
 I made it 
  January 2, 2014
Quoting Mike Forslund I would love to build this! Awesome model. I love it!
As mentioned below instructions will be available. It will be somewhere at the end of this year. Both here and on YouTube the availability will be announced...
  December 30, 2013
I would love to build this! Awesome model. I love it!
 I made it 
  December 15, 2013
Quoting Construction David great Model and great functionality keep building.
Thanks and yes I will… :-)
 I like it 
  December 15, 2013
great Model and great functionality keep building.
 I made it 
  November 28, 2013
Quoting martijn tack when are the instructions for this amazing trailer there?
As far as I can tell now it will take up about one year. First thing to release is instructions for the trailer that goes with the truck I did instructions for in September. To be precise, the instructions will be released next week… So just be patient and you can build this model someday your self too!!! :-)
 I like it 
  November 27, 2013
when are the instructions for this amazing trailer there?
 I made it 
  September 22, 2013
Quoting adam minnich GREAT TRAILER!! You always seem to out-do yourself. I have actually been trying to make this trailer, but that been having trouble with the locking mechanism for the gooseneck and how to move the gooseneck up an down. Do you think you could help me??
I did not noticed your comment before... But I have great news, I will create instructions for it. When I'll do so I am not sure of, but give a couple of more months. These will be sold at mocplans.com, but it'll be announced at a lot of places...be patient... :-)
 I like it 
  April 13, 2013
GREAT TRAILER!! You always seem to out-do yourself. I have actually been trying to make this trailer, but that been having trouble with the locking mechanism for the gooseneck and how to move the gooseneck up an down. Do you think you could help me??
 I made it 
  April 7, 2013
Quoting Henri Vanoost Do you have any building instructions for This amazing trailer?
Not yet, but this is a trailer I have plans on creating instructions..so be patient... :-)
 I like it 
  April 1, 2013
Do you have any building instructions for This amazing trailer?
 I made it 
  January 5, 2013
Quoting Hunter Lemon Can you make one that is minifig scale? I do love this model though.
To be honest, I have plans to build these in minifig scale!!! :-)
 I like it 
  December 29, 2012
Can you make one that is minifig scale? I do love this model though.
 I made it 
  December 6, 2012
Quoting Ryan Carpenter Hey This is a really good model, i have tried in the past to make a low boy but have failed. I am wondering if I could get a copy of the Blueprints for this, thank you.
Thanks for the kind words. I don't have any blueprints basically because I don't use any. Also do I not have instructions for this model yet, but I have plans on creating some...
 I like it 
  December 5, 2012
Hey This is a really good model, i have tried in the past to make a low boy but have failed. I am wondering if I could get a copy of the Blueprints for this, thank you.
 I made it 
  September 22, 2012
Thanks for the kind words on this model. I am glad I inspire people, but you are on your own to build on. Creating and sharing instructions is not realy what I am up to. The actual building is what I love doing... Cheers!
 I like it 
  September 22, 2012
This is exactly what I have been needing to complete my construction set. Please email instructions to me at msmith66742002@yahoo.com. I would really appreciated it!!
 I like it 
  March 14, 2012
Hi brother this is a excellent art work you done . Beautiful and nice building by the way can you email me at joe_oem@hotmail.com able the building instruction so that I can follow thanks
 I made it 
  February 23, 2012
Quoting George Staples Very good, I like the placement of the battery box, very sneaky. I didn't see it the first time I looked at this model. I also like the CAT excavator.
Thanks a lot. The battery box was a pain in the bud to be honest and I'm glad I came up with this solution. On the excav there'll be another topic someday...
 I made it 
  February 23, 2012
Quoting Joe Spar Can you send me the building-plan..... Please Thank you very much.
No I can't because I don't have any...
 I like it 
  February 22, 2012
Can you send me the building-plan..... Please Thank you very much.
 I like it 
  January 23, 2012
Very good, I like the placement of the battery box, very sneaky. I didn't see it the first time I looked at this model. I also like the CAT excavator.
 I made it 
  January 10, 2012
Quoting Chris Melby Can I ask, where do you source your bricks for these killer builds? Please let me know, I am hoping to find a source better than brick link. Chris
BrickLink it is...I'm sorry... :-) In my opinion this is a very good source...why isn't it yours?
2LegoOrNot2Lego Ingmar Spijkhoven
 I like it 
Chris Melby
  January 9, 2012
Can I ask, where do you source your bricks for these killer builds? Please let me know, I am hoping to find a source better than brick link. Chris
 I made it 
  September 24, 2011
Quoting Thomas Graafland looks good! I realy like the "jeep". You made that excavator yourself? Please check out my trailer:)
Thank you very much. The jeep was fun to build, quite easy in a way but with quite a lot of functions to it. Yes, the excavator is mine as well. I will display it quite soon, I need to make a little movie of it.
 I like it 
  September 24, 2011
looks good! I realy like the "jeep". You made that excavator yourself? Please check out my trailer:)
 I like it 
  June 27, 2011
awesome work! trailer is very nice! do you have instrucktion that lowboy trailer ! if you have can you sent to me ! isukki08@gmail.com regards Kimmo
 I like it 
  January 1, 2011
I am an avid builder of Lego have been for over 30 years, but this is just amaizing, I just finished building the 8043 and want to find a hauler for it, this so fit the bill. Just amazing
 I like it 
  December 25, 2010
Very impressive!
 I like it 
  December 3, 2010
hi m8 that is great and i did make the digger and i think that i can make that too. p.s can i have the instructions for it please and send it too my hotmail address: this is my hotmail address ben_peachey_17@hotmail.com.
 I like it 
  November 19, 2010
oh sorry I did not look good on the page
 I like it 
  November 19, 2010
how do you sliding the pin of the trailer into the other piece please let me now? i am build another trucks with power functions i have an low boy trailer but i don't know how to make on the truck same way as yours, I made about the front section. but how do I make it onto the trailer now that I can disconnect electric again. greetings rik Moorman. P.S. can you please let me know what your answer is?
 I made it 
  November 6, 2010
Quoting Viral Porqupine Excellent build mate. One question though, what do the motors down the center line if the trailer do?
Please check movies on YouTube, you'll find out, I did add one more movie to make it all clear...
Quoting tony tiger Is there possiblity to add a few pictures of how you constructed to locking pins with the linear actuator in the trailer part?
One more movie is added in YouTube, it is here on MOCpages as well, it is called "Lego lowboy locking pins"...have fun building...
 I like it 
  November 5, 2010
Excellent build mate. One question though, what do the motors down the center line if the trailer do?
 I like it 
  October 31, 2010
Is there possiblity to add a few pictures of how you constructed to locking pins with the linear actuator in the trailer part? I am trying to build my own powered trailer.
  October 26, 2010
great work. i have seen some renders from your models on brickshelf. if the renders createt from a cad (mpd) file, its possible for me to make my own buildinginstruction. the only thing i need is an mpd file, is there a chance for me, to get them ?
 I made it 
  October 24, 2010
Thanks for the kind words on this project. About instructions...no there aren't any...
 I like it 
  October 22, 2010
What an excellent model. Did you make any instructions that you could post. I would love to be able build a trailer with the detachable gooseneck.
 I like it 
  September 28, 2010
Excellent job on the lowboy. I work for a trucking company and we have a few trailers that look exactly like that. And they operate very similar to your model. Again, great job.
 I like it 
  September 13, 2010
Hi Ingmar, Just getting into Lego myself (have a 5 year-old son and buying Lego for him I got myself interested in Technic. Was looking around for (rigid) construction ideas for a low-boy when I found your page. Great work and I love the details you show in your pictures. Keep up the great work!
 I like it 
  September 4, 2010
Love it.More then the Trailer i like the Loading Good.Now my son wants to build one like this.
 I made it 
  September 1, 2010
I like to thank you all for the kind words...
 I like it 
  August 31, 2010
Excellent build and I appreciate the technical attention to functional detail. Inspiring!
 I like it 
  August 29, 2010
Nice - I need one of these to haul my excavator around or a few of my other projects. Great Job!
 I like it 
  August 27, 2010
Geez. It's impressive how you manage to make it look and operate so much like the real deal. The gooseneck is very cool ~ However I don't quite like the speed at which it moves. If you have spare cash, try NXT motors. You need not buy the whole NXT set, just the motors and power them from the PF battery box, just modify the connectors. Don't worry about the size, your trailer is already so big !
 I like it 
  August 24, 2010
very very good truck and trailer. i like all the funktions!
 I like it 
  August 24, 2010
Wonderful MOC!! 164cm? You're crazy! I love the way you put the mechanisms in such a small place... Unbelievable! Bravo!!!
 
By 2LegoOrNot2Lego Ingmar Spijkhoven
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LEGO models my own creation MOCpages toys shop Trailer 4 (Lowboy Trailer)Large scale vehicles


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