Trailer Tr4 MKII

MOC designer Ingmar Spijkhoven

Difficulty: Moderate

Posted: Feb 06, 2017

Purchase for $28.50
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Model "Trailer Tr4 MkII” is build with LEGO® in scale 1:17,5 and motorized using LEGO® Power Functions. It is not build after a specific brand or type of trailer. This build represents a three axle detachable gooseneck lowboy trailer with liftable third axle.

The trailer features: solid axle suspension on all axles, one set of lights, kingpin, mechanical parking break, gooseneck frame support, remotely controlled liftable third axle, remotely lowering and lifting of the deck and this model has many details. 

This newly design and engineered trailer utilizes the same suspension as both "US Truck T1 MkII" and "US Truck T2 MkII". It uses LEGO® rubber belts and LEGO® rubber axle connectors.  Designing and engineering this trailer parts availability is checked. So it can easily be build in the color as it is, Yellow, but it can also be build in Red, Blue and Black. 

Attention!!!: Both "US Truck T1 MkII" and "US Truck T2 MkII" needs to be adapted to be combined with "Trailer Tr4 MkII”!!!  Else could be used a so called dolly which acts as a convert to fit the trailer. For this dolly building instructions will be available soon.

Attention!!!: LEGO® Technic set 8258 Crane Truck needs to be adapted and requires a modified gooseneck!!! Instructions for "Trailer Tr4 MkII” to go with  LEGO® Technic set 8258 Crane Truck will be available soon!

This model is another custom design by Ingmar Spijkhoven AKA 2LegoOrNot2Lego that comes with building instructions and inventory/parts list. So, you can build it yourself!  To do so you can buy the Building Instructions. Early in the building process you will see what it is that you are building. You will be very excited from the moment you start the build of "Trailer Tr4 MkII" till you finish it with a total number of parts of about 1450 pieces.

With this type of lowboy trailer the gooseneck is removed to make the deck accessible. Because the front part of the trailer rests on the surface the truck with the gooseneck still attached can drive off. In order to keep the gooseneck elevated at the correct hight is as a support. This support rests on the trucks frame.

The ramps can be lowered and any self propelled load can enter the trailers deck. With the trailer loaded and the load secured the gooseneck can be reattached. This is done by backing up the truck aligned with the trailer. With a support that rests on the trucks frame the gooseneck can be lowered of lifted to make sure it comes in place. Finally the deck can be lifted again and the gooseneck can be locked so it doesn’t go anywhere without the trailer itself.

Trailer Tr4 MKII

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Comments & Reviews

Customer Reviews

Visual Review with Questions Review by Chadwick
MOC Design
Instruction Quality
Part Availability
Overall Value
The Trailor Looks fantastic.
The Functionality is well designed.
Realism is solid

Does the US Truck T1 MKII (Yellow Version) work with this Trailor? (Posted on 3/23/2016)
Amazing design Review by Greg88
MOC Design
Instruction Quality
Part Availability
Overall Value
Wow this trailer was a lot of fun to build! The directions are spot on. All the functions work smoothly and accurately. This build got me back in touch with being a kid and having fun again! I built this one in blue and I plan to build a second in green. (Posted on 2/7/2015)

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