[MOC] Case IH Steiger 620

[TeamThrifty]

Hi All, this is my first MOC post.. i've added pics to flickr but i'm struggling to embed the links properly!! Hopefully they get you there if you fancy a look.... this should take you to an album if the embedded one doesn't - https://flic.kr/s/aHsm2DcF7C 

This is a Case IH Steiger 620, it is 42cm long and 24cm high an the scale is 18:1

I'm using 3rd part tyres on lego rims, these are temporary as i have some better tractor tyres coming.. (i started this before Xerion was released!!!) ..the current tyres are 120mm in diameter and 42mm wide, new ones are 130mm and 60mm wide, should be much better!

Here is a list of the functionality...

• 4wd using 1 XL motor and is RC
• Diff lock on rear axle using driving ring
• Pivot steer using 2 large linear actuators powered by 1 M motor and is RC 
• Pivot uses the Case IH tri-point mechanism - 1 is the pivot then 2 & 3 are a bar with ball joints on each end. This stops the pivot 'sagging'. I've used a 6L pan hard rod for this.
• Oscillation is by a small turntable with 4wd shaft through the middle.
• PTO is driven of the main XL motor but an be disengaged - the is the second shaft that can be seen above the main pivot, as in the real machine. It uses 1 UJ and 1 CV joint to allow for the pivot and oscillation.
• Full pneumatics to power the rear 3 point linkage using 2 rams with the same geometry as the original.
• Also 3 take-off points for the pneumatics
• pneumatic pump is powered by 1 M motor and is RC

I really need to improve the styling(!), my aim was to get all the functions built and working as close the original as possible, which is why i've used the tri-point pivot and 3 point linkage geometry.. it can make it awkward, but i wanted to get those kinds of things right.

 

 

 

 

 

 

 

 

Ok, so i either get a message telling me the link has been embedded... but as you can see above, it hasn't! Or it says there's no image at the url... Probably something really simple i'm missing, but the link included in the test does work. I'll try and embed some images in the meantime...!!!

[jrx]

Hi, looks really good your tractor. For embedding pics here: Go on "sharing" arrow on flickr and copy the BBcode in size of your choic e and insert the copied code just in your post. That's it :)

[TeamThrifty]

 

Bingo!!! Thanks jrx!

 

 

 

[BrickbyBrickTechnic]

Wow! Very nicely done, looks very mechanically intricate looks beautiful too. The lights on the cabin are misaligned, but I'm just nitpicking.

[1gor]

Not bad model at all. If you are interested I've made about 10 years ago Quadtrac STX (posted it in 2009), so you can see if some of "my" ideas on this moc are usefull to you

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=365319

[Leonardo da Bricki]

Pretty nice model.  Is there any reason you did not use the Claas Xerion tires? They would look better then trophy truck racing tires, IMO.

[TeamThrifty]

Hi, i'd done most of the chassis before Xerion was released and the scale is too big for xerion tyres so i stuck with these - but i have new tyres coming as mentioned above.Some of these.. http://www.ebay.co.uk/itm/4pcs-2-2-Crawler-Truck-Tires-130mm-2-2-Beadlock-Wheels-Rims-Fit-RC-4WD-Axial/282569697521?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 

Should look a lot better... also planning a Fendt 1050 or Axion 950 using these new tyres for the rears and xerion for the front. should be a good! 

[1gor]

12 hours ago, TeamThrifty said:

Hi, i'd done most of the chassis before Xerion was released and the scale is too big for xerion tyres so i stuck with these - but i have new tyres coming as mentioned above.Some of these.. http://www.ebay.co.uk/itm/4pcs-2-2-Crawler-Truck-Tires-130mm-2-2-Beadlock-Wheels-Rims-Fit-RC-4WD-Axial/282569697521?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 

Should look a lot better... also planning a Fendt 1050 or Axion 950 using these new tyres for the rears and xerion for the front. should be a good! 

Fendt 1050 should be interesting, but keep in mind that Fend has independent front suspension like this

 

It would be very nice if someone has info about proper tractor tires that have treads that exactly fit LEGO CLAAS tires and have 131.5 mm outer diameter... Both mentioned tractors are real monsters.

 

[TeamThrifty]

I've already built the front axle 

I'll post a pic - its suspension is as like above and is narrow track, both those tractors are under 3m wide, so the track width is vital to get accurate scale.. Suspension, 4wd and steering in a compact axle is a fun challenge... 

The tyres i've got are in a link further up - proper tractor tread pattern and 130mm dia, 60mm wide. Using them for rears and claas 107mm for fronts. 

I don;t have dark green for the fendt, so it will likely be the Axion 950 (though there's a 960 out now with 445hp!).. that uses 2.15m rear tyres, so the scale is 16.5:1 - gives a wheelbase of 19cm. should be a good build!

[TeamThrifty]

Here's a link to a folder with a few front axle pics in.. it uses the structure of having the diff mounted longitudinally behind the axle to reduce width, you can see the 2 input shafts. chassis width where the tyres touch is only 3 pins, so it allows good steering angle. Still experimenting with a few things... servo motor? probably not staying. Suspension will be strings not pneumatic, though i like the idea... air is a spring after all, and with an accumulator, could give the adjustable ride hide that the fendt has...

..but, it narrow - 11 pins pivot to pivot -  and has all the functionality, so is a good start!!

 

[1gor]

I know about your solution - this was the reason that I have abandoned development of such tractor (I did not want to have longitudinal  differential on axle)...I do not know if you already know that, but on this topic you can find some ideas for axles...

...just one small suggestion - try not to use cv joints on steering wheels (if you do not have 4WS) due to very bad steering angle 

Edited September 11, 2017 by I_Igor

[TeamThrifty]

Thats a great thread! I'd rather have the diff in the axle, but its a price i'm willing to pay for a narrow track... You're right about the cv joint limiting the angle. They may need to go! 

If i decide on the claas axion, then it uses a solid axle thats suspended, so that helps a bit.. need to build a test axion axle really!!

[1gor]

11 minutes ago, TeamThrifty said:

Thats a great thread! I'd rather have the diff in the axle, but its a price i'm willing to pay for a narrow track... You're right about the cv joint limiting the angle. They may need to go! 

If i decide on the claas axion, then it uses a solid axle thats suspended, so that helps a bit.. need to build a test axion axle really!!

Sadly I was never (and I'm not today) clairvoyant because I've made it (CLAAS Axion front axle) several years ago, but I have some Axion front Axle images from one my good friend who is engineer at CLAAS. Axle looks like this and has single shock absorber

for shock absorber perhaps you can use this part

 

...just one additional thing to our moderators, @Jim and @Milan please send me a PM if axle image is to big to make it smaller tomorrow. thanks

Edited September 11, 2017 by I_Igor

[Jim]

1024 is okay 

[1gor]

Just now, Jim said:

1024 is okay 

Thanks; that was very fast response  to mis(use) and to go a little more off topic when you will make review of 42053 set, please can you make photos with 49.5 tires?

@TeamThrifty I was looking an amazon on tires that you mentioned, but I'm not sure how similar tread is with LEGO tire. Let us be (nicely) surprised 

 

[TeamThrifty]

Fingers crossed! I saw the tyres, and how big they were... and the inner diameter is very close... so thought i'd take a gamble  - they were too good not to at least try!! i'll post some side by side pics when they arrive, and a review of how they fit on the rims.

That pic of the axle is very useful, i may start building V1 today.. should be able to have the diff in the axle as no independent suspension makes it easier, and bigger scale means there's more room for the suspension system to be squeezed in.. maybe front diff lock too!!

[1gor]

3 hours ago, TeamThrifty said:

Fingers crossed! I saw the tyres, and how big they were... and the inner diameter is very close... so thought i'd take a gamble  - they were too good not to at least try!! i'll post some side by side pics when they arrive, and a review of how they fit on the rims.

That pic of the axle is very useful, i may start building V1 today.. should be able to have the diff in the axle as no independent suspension makes it easier, and bigger scale means there's more room for the suspension system to be squeezed in.. maybe front diff lock too!!

I'm also interested to see how are tires in reality. 

If you allow me I would like to suggest that you implement detachment of front wheel drive instead of differential lock. I'll keep my fingers crossed