So, this is a project I've been working on for the past 10 months or so. This is a remote control backhoe based on the JCB 3CX.
There are 9 motors, and 12 functions (11 if you don't count the gearbox selector as a function).
Drive | 2 XL motors
Steer | 1 m motor
Boom | 1 XL motor
Gearbox Mode Switch | 1 m motor
Dipperstick | 1 m motor*
Dipper | 1 m motor*
Dipperstick Extension | 1 m motor*
Boom Slew | 1 m motor*
Right Stabilizer | 1 m motor*
Left Stabilizer | 1 m motor*
Loader | 1 m motor*
Loader Scoop | 1 m motor*
Working steering wheel
Fake I4 engine with moving pistons and fan
*Functions operated through gearbox
3 XL motors
6 m motors
2 battery boxes
5 IR receivers
3 extension wires
1 set LED lights
10 linear actuators
1 mini linear actuator
4 wheel drive with center differential
8 output gearbox
Pendular front axle
25x140 studs (approximate)
5500 pieces (approximate)
LEGO didn't make a wheel large enough, so I had to piece together my own. For each of the rear wheels, I built an internal frame and each wheel has 32 smaller LEGO tires stretched around the frame. This took forever to do.
The steering uses a mini LA.
All in all, I'm really happy with how it turned out. Some of the motors are straining a bit, and knowing what I know now, I think I'd do one or two things differently.
In the future, I'd like to build a pneumatic version with a few more functions. That will be in a while, and I have a list of mocs I'd like to build prior to another backhoe.
Anyways, just thought I'd show you all my project.
Thanks for all the kind words! This project was a lot of fun, but had its challenges as well. I would like to build a version 2 with a few more functions and pneumatics, but I've got multiple projects I plan to build first.
This looks genuinely brilliant - the rear wheels are genius but it's the functions that are the most exciting. They look very complicated and seem to capture everything the real vehicle would do An awesome Technic build. 5/5.
So, while personally not a big fan of working machinery, this is just one stunning piece of Technic, and it well deserves it's feature on TBs (congrats, by the way!).
I like the features a lot, and the fact that you're controlling almost everything through that central gearbox is pretty keen, given the number of features. I'm a little worried about how it would actually perform under heavy load, but those LAs were never meant to operate on a big scale, it seems to me. So, all in all - great MOC, looking forward to your future builds!
looks awsome. you made it just like the real thing! i especally love how you made the arm with the bucket slide in and out. i also know how hard it is to make all those functions fit into a small spots! great model! to judge it on a scale of 1 to 10 i'd give it a 1000 :]