falconluan Posted February 22 Posted February 22 (edited) Claas published their new Axion 9 Terra trac tractor recently, I think its hood looks way better than the old one, so it's time to make a lego technic one. It has been finished, you can find its instructions at https://rebrickable.com/mocs/MOC-256008 if interested. Feature introduction video: Features: Original contents: I've built some tractor MOCs which are in scale with 107mm tractor tire at the back(you can find them at https://rebrickable.com/users/falconluan/mocs/ if you are interested). But I want to build bigger scale than them. Pitty that the 107mm tire and 14 tooth sprocket wheel are the biggest we now have available. To make something bigger while not use 3rd party parts, l chose to use tire to drive tracks in order to have a larger sprocket wheel. A simple test proved it works: Then I switched to 75mm offroad tire for better traction and scale, and this is what I came with: Edited March 19 by falconluan Quote
falconluan Posted February 22 Author Posted February 22 The lastest status: Rolling chassis is finished The increase of size is obvious when putting it along with 1:18 scale tractor. It certainly has different features from the smaller one, such as: Two PF L motors for drive instead of one A PF M motor will be used to select both drive modes and functions Drive modes and functions are switched together: High speed RWD is selected together with rear linkage, low speed AWD is selected together with rear and front PTO A power output connected directly with drive shaft at the back, it can be used as PTO while the standalone one can be used as simulated hydraulic output The front axle is completely "float" while it pivots around a fixed axis at the smaller one Rear linkage is controled by two small LA instead of worm gear on the smaller one A demo video of its driving performance: It drives well in both high speed and low speed modes. However, when hold the wheel still, the 20T gear drives rear diff will slip. Will try to switch to the new heavy duty diff to see if it can fix this. Will work on the hood and cabin as next step. Hope you guys like it Quote
Jundis Posted February 22 Posted February 22 Uhh this will be a heavy chunker! Looking forward to the progress. Please put Ackermann geometry in the steering :-P Have you thought about a 1:18 scale version of it? Quote
1gor Posted February 22 Posted February 22 (edited) On 2/22/2026 at 2:09 PM, Jundis said: Uhh this will be a heavy chunker! Looking forward to the progress. Please put Ackermann geometry in the steering :-P Have you thought about a 1:18 scale version of it? I think it is better this way to make it 1:16.5...last 3 months I have spent time developing chassis for 6300 Fastrac with 107 tires, everything is great, just one small problem - I need one stud extra in the middle and narrower tires to incorporate 6 functions - with just simple all wheel steering. So from 1:16.5 scale I went back to 1:15 and optimize my 4220 Fastrac.. @falconluan I hardly await to see progress on your model. Looks great so far. Edited February 23 by 1gor Quote
falconluan Posted February 22 Author Posted February 22 10 minutes ago, Jundis said: Uhh this will be a heavy chunker! @jundis Yes, it will have 2000+ parts when finished I guess. I have to admit that I haven't built neither large MOC or large official set for some years, and I'm very pleased to see that the new parts TLG released these years can help that much when build large scale structure. The large frame and beams with alternating holes are very handy, they make my loads of black and gray beams in storage useless 20 minutes ago, Jundis said: Please put Ackermann geometry in the steering :-P Ackermann geometry means I will need to use the new 4L steering link, currently I'm using the old 6.5L one, and the width steering link matches the hub perfectly well. I will give it a try, since it has already many new parts on it anyway... 22 minutes ago, Jundis said: Have you thought about a 1:18 scale version of it? Maybe I will make one, to lineup with my current 1:18 tractor team, the shape of new hood is challenging since its shape now as other brands, becomes rather complex... even too complex for the bigger scale... 19 minutes ago, 1gor said: I hardly await to see progress on your model. Looks great so far. Thank you @1gor, will keep this thread updated 1:18 will lose some functions if you want to keep the propotion right. Tractors are too narrow in the middle... Quote
1gor Posted February 22 Posted February 22 (edited) 2 hours ago, falconluan said: Thank you @1gor, will keep this thread updated 1:18 will lose some functions if you want to keep the propotion right. Tractors are too narrow in the middle... That was the reason for me to quit my 90% finnished 8330 Fastrac - front part was compromized with Cada 94.3 tractor tires but steering angle is very small and I can not squeeze 2 motors below hood... Edited February 22 by 1gor Quote
AdamFMX Posted February 22 Posted February 22 As fellow Farming Simulator player I am looking forward to result of this project. I haven't seen much AWD halftracks by the way, so it is even more interesting. I had myself built few "tractors" (better said something pretending to be tractor) with motorized functions and it is really challenge to pack everything neatly even when doing it off-scale. Quote
falconluan Posted February 23 Author Posted February 23 9 hours ago, AdamFMX said: As fellow Farming Simulator player I am looking forward to result of this project. I haven't seen much AWD halftracks by the way, so it is even more interesting. I had myself built few "tractors" (better said something pretending to be tractor) with motorized functions and it is really challenge to pack everything neatly even when doing it off-scale. I am also a farming simulator player and it is what inspired me to start building tractor MOCs. I've built some AWD halftracks before in smaller scale(around 1:18) if you're interested: Case IH magnum: https://rebrickable.com/mocs/MOC-192623/ New Holland T8: https://rebrickable.com/mocs/MOC-197351/ And a "full track" John Deere 8RX: https://rebrickable.com/mocs/MOC-212799/ They are smaller so they don't have as much functions Quote
AdamFMX Posted February 23 Posted February 23 5 hours ago, falconluan said: I am also a farming simulator player and it is what inspired me to start building tractor MOCs. I've built some AWD halftracks before in smaller scale(around 1:18) if you're interested: Case IH magnum: https://rebrickable.com/mocs/MOC-192623/ New Holland T8: https://rebrickable.com/mocs/MOC-197351/ And a "full track" John Deere 8RX: https://rebrickable.com/mocs/MOC-212799/ They are smaller so they don't have as much functions Oh nice. Main reason why I was affraid of halftracks are wheel/sprocket+track diameters to make correct ratio. Quote
Aleh Posted February 23 Posted February 23 I think it looks good. But does it suit the chassis? Quote
TeamThrifty Posted February 23 Posted February 23 I'm in love with this build. I've wanted to do a tracked tractor for a while but small scale isn't my thing - what you've done here is excellent! (maybe a quadtrac is next on my list...) I'm currently building a Case Optum 440 using third party tyres - 150mm rears, 130mm front. I like big!! Awesome what you're doing here. Tractors are a sub-niche it seems but they're ideal for technic. No idea why car-coma is so popular. Quote
Aurorasaurus Posted February 23 Posted February 23 8 hours ago, falconluan said: What do you think of this hood? Looks awesome! I think it captures the look and feeling really well, I'll be following this build. I like how you're working with the standard angle parts instead of using system parts too. Quote
falconluan Posted February 24 Author Posted February 24 19 hours ago, TeamThrifty said: I'm in love with this build. I've wanted to do a tracked tractor for a while but small scale isn't my thing - what you've done here is excellent! (maybe a quadtrac is next on my list...) I'm currently building a Case Optum 440 using third party tyres - 150mm rears, 130mm front. I like big!! Awesome what you're doing here. Tractors are a sub-niche it seems but they're ideal for technic. No idea why car-coma is so popular. Thanks. Your Optum will be bigger than this one, looking forward to see your progress on it. I think technic fits tractors well too, tractors are more tolerant on technic holes than cars and have more functions to be implemented. After all the tractor mocs I did, I feel that they are not popular than cars for sure 14 hours ago, Aurorasaurus said: Looks awesome! I think it captures the look and feeling really well, I'll be following this build. I like how you're working with the standard angle parts instead of using system parts too. Thank you. I tend to build as much technic as possible. Maybe because I like a more pure technic style(which seems not align with the trend of official sets), or simply maybe because I don't have many system parts to play with... Quote
TeamThrifty Posted February 25 Posted February 25 21 hours ago, falconluan said: I like a more pure technic style Agree 100% Quote
Johnny1360 Posted February 27 Posted February 27 Great job recreating a real life tractor into LEGO form, I really enjoy studying other people's build styles as I think it helps me develop my own. My biggest question here though has nothing to do with the build, which seems to be well done and carefully thought out, more to do with the whole purpose of making a tracked vehicle with front wheels, what advantage is there in doing this? Quote
Maaboo the Witch Posted February 27 Posted February 27 2 hours ago, Johnny1360 said: My biggest question here though has nothing to do with the build, which seems to be well done and carefully thought out, more to do with the whole purpose of making a tracked vehicle with front wheels, what advantage is there in doing this? Reduced soil compaction, better traction, and improved stability on steep terrain, with better steering and easier handling than fully tracked tractors. Quote
falconluan Posted February 28 Author Posted February 28 The hood and side tanks are done, still lots of work ahead On 2/23/2026 at 10:21 PM, 1gor said: Looks good, just check if angleas are right... @1gor you are sharp on shapes The front slope of privous version was too big, now I think it looks right Quote
1gor Posted February 28 Posted February 28 (edited) @falconluan, trust me; for my Fastrac I spent about 9 months to make optimal hood (with Technic parts) and I know what it takes; usually there is half stud offset or smething similar when you want to make appropriate shapes. It looks really good now IMHO buddy. I think I'll make separate photo album on my phone gallery just for your Axion. It is indeed long time needed uo make things work properly...I spent 3 months to integrate BuWizz and still need to see how to charge it from side since steps are in the way...Just look how long @eric trax develops his gorgeus Massey Ferguson 9 series trac... Kind regards ...maybe this part is better on side instead 3 x 7 panels? https://www.bricklink.com/catalogItemIn.asp?P=24119&colorID=85&in=A Edited Monday at 06:29 PM by 1gor Quote
falconluan Posted March 1 Author Posted March 1 20 hours ago, 1gor said: ...maybe this part is better on side instead 3 x 7 panels? https://www.bricklink.com/catalogItemIn.asp?P=24119&colorID=85&in=A I am not fan of the tank looks now either. I will give the curved part a try, although the tank side of the real tractor is a pretty straight line, trade off, always, I know Quote
1gor Posted March 1 Posted March 1 I know (saw one on semitrailer...), but thus part comes only in yellow and black so far... https://www.bricklink.com/v2/catalog/catalogitem.page?P=6613#T=C Quote
falconluan Posted March 1 Author Posted March 1 20 minutes ago, 1gor said: I know (saw one on semitrailer...), but thus part comes only in yellow and black so far... https://www.bricklink.com/v2/catalog/catalogitem.page?P=6613#T=C Yep, I'll try the curvy one then. Funny that when I first saw the angle new part, I didn't think it would be so much useful.... Quote
1gor Posted March 1 Posted March 1 1 hour ago, falconluan said: Yep, I'll try the curvy one then. Funny that when I first saw the angle new part, I didn't think it would be so much useful.... I neded yellow long ago, so in the meantime project is goner...now I concentrate myself on optimizing my Fastrac and then I'll see what else can I make to fit 1:15 scale properly... I see you use gearbox to switch between functions; so you need 2 PF servos in order to work... Quote
falconluan Posted March 2 Author Posted March 2 22 hours ago, 1gor said: now I concentrate myself on optimizing my Fastrac and then I'll see what else can I make to fit 1:15 scale properly... Looking forward to see your progress on the Fastrac 1:15 is a pretty large scale for farming things other than tractor, such as, a 7.5m wide cultivator will be 50cm in 1:15, no need to say the big trailors, good luck on that I'm planning to build something for the Axion TT, especially something can demo its functions, a triple mower is an ideal candidate, but 9m+ rear mower will also be 50cm+... 22 hours ago, 1gor said: I see you use gearbox to switch between functions; so you need 2 PF servos in order to work... Yes, still one motor left to be mount, but it will be a PF M motor, since it only has 2 gears and functions to select, I will use the gear changing solution in 42129 for it. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.