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Lego Technic MF with butterfly mower
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Another tractor, now with a butterfly mower. You can vote for this MOC on cuusoo! The movie is at the bottom of the page.
About this creation
Click here to support on Cuusoo!

The movie




MOC in short
Drivetrain: Rear axle differential drive with 4-inline fake motor.
Control: black steering wheel on top of cabin
Building instructions: YES , system, CAD.
Manual functions: Front&rear PTO 2-speed, front and rear three point hitch, 4-inline piston engine, adjustable mirrors, rear mowers lifting, mower blades turning.

I have always loved building tractors so now I decided to build one for Lego Cuusoo. Not because Lego doesn't build tractors but because they build tractors with only a few functions.

The equipment is this time a 3-mower system with rotating blades. Farmers uses these tools to cut the grass for forage harvesting. The grass will be stored and in the winter be used for the cattle.



The tractor has all functions that a tractor must have: front and rear 3-point hitch, front and rear PTO and a 4-inline piston engine. The PTO is the power take off for the tractor: it gives energy to the tractors equipments. In this case I added one mower on the front and 2 on the rear. This configuration is called the 'butterfly' mower due to the characteristic shape. The PTO can be turned on and off and has 2 possible speeds. Therefore this model has a driving ring system in it and it was quite hard to create a simple solution there to make it fit for Lego Cusoo. You can vote for me if you like this MOC.



The mower would in reality have a width of 9 metres. Of course, with this width you can not transport it. Therefore the 2 rear mowers are lifted by the black gear at the right of the rear mower. Also on this photo: the mowers are supported by small 'field wheels' that follow the outlines of the landscape. The mowers have moving blades that can turn at 2 different speeds. The speed selector is at the right of the tractor. To prevent friction, drive lines for the PTO have been kept very simple.



The mower is now in transport position: the front mower is lifted and the 2 rear mowers are both lifted by the mower's system and by the rear hitch.



The tractor: a very sturdy, technically base. Actually, Lego Technic has no wheels for building tractors unless you make them small due to scale conditions. I also used this rule and build a very small and short tractor. In that case, it is hard to build a 3-point hitch, a differential and 4WD. So I left out the 4WD, enabling in that way a full-operated front 3-point hitch.



So why does the tractor not bend under the giant weight of the front and rear mowers? The answer is given in the picture above. A very sturdy, 5 studs high, frame is built from front to rear, containing all gears and supporting all frameworks. Actually it are two frames connected by 5x3 liftarms.



The PTO (power take off) has a special feature: it can have 2 speeds. This is done by the smallest and lightest-turning gearbox I ever built. The switch is now in the 'off'-position. In the video, all systems are showed, some of them turning with SR3D builder.



The 4-inline piston engine fits right under the bonnet.



I have added a full range of details in the cabin: handles, warning lights and a steering wheel. At the background: the rear point hitch is controlled by the right flashlight on the cabin top. So that is the axle of that system.



The lifting system for the mowers was kept simple to reduce weight. It proved to be reliable.



I have built an additional dump trailer. It features a towball hitch, a parkin jack, automatic/manual rear door control and of course tipping. In the movie, this features are displayed.



This is the MOC in practice. Compare it with the second photo...





Media reference: The Lego Car Blog




Comments

 I like it 
  June 29, 2013
hello i have a question when Comes the instructions?
896gerard _
 I like it 
Trey Roudebush
  June 23, 2013
How to start and build a chassis.
 I made it 
  May 9, 2013
Thank you all!
 I like it 
  May 5, 2013
A really nice Technic build. Looks great and functions great too. It could be a set! 5 stars. P.S It's on The Lego Car Blog today, congrats! http://thelegocarblog.com/2013/05/05/one-man-went-to-mow/
 I like it 
  May 5, 2013
a very detailed model, really well done
 I like it 
  May 4, 2013
Awesome!
 I made it 
  May 3, 2013
Quoting Matt Bace Looking forward to seeing it on Cuusoo. This is awesome! Too many Technic MOCs seem to concentrate on trying to integrate power functions, but I think that a MOC like this one, with plenty of well-designed manual functions, can be even better.
It is now on cusoo. I have added the link in the article above.
 I like it 
  May 3, 2013
Very cool. It looks great! -LB Senior
 I like it 
  May 2, 2013
Looking forward to seeing it on Cuusoo. This is awesome! Too many Technic MOCs seem to concentrate on trying to integrate power functions, but I think that a MOC like this one, with plenty of well-designed manual functions, can be even better.
 I like it 
  May 2, 2013
Impressive!
 I made it 
  May 2, 2013
@everyone: building instructions for the system: will be uploaded soon.
 
By 896gerard _
Add to my favorite builders

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LEGO models my own creation MOCpages toys shop Lego Technic MF with butterfly mower Technic


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