I cant take pictures of my truck with this set up, but D3K was the one that helped me it. I included the link of the drivetrain and how it works. I changed it to make it wider, but in your case (if you have 3 XL motors) you could power all three axles separately using this great setup.

http://bricksafe.com/pages/D3K/Ideas/Dual%20driven%20rear%20axles

About two of three years ago i tried to incorporate a fifth steers axle in an RC 8258. The problem I ran into was that having no suspension and the last axle being not powered the truck stopped at that slightest bump (trying to driv onto a small carpet. The poweed axles 3&4 were lifted off the ground and the whole thing got stuck. Thus I would recommend a 4 axle setup with the 4th axle being steered and having some kind of suspension.

For now mine drives over the carpet really well although I'll have to see how it does after I add the steering axle. Also I dont own any spare suspension pieces

I think it looks a bit long.. Remember; the longer the vehicle -> longer tipping bed -> more strain on whichever tipping mechanism you opt to use..

Also, having three rear axles, one of them should probably be steered, or you'll end up having a lot of sideways friction and strain whenever you are turning. I am actually playing with a similar setup in LDD now, but I opted to have the fifth axle steered, as in the image below:

Alright the fifth axle sounds like a good idea I'll definitely implement it.. Concerning the length, I really like it as I want it to be big enough for the 42030.

Would adding another axle to the middle of the truck help? I feel like it will make the middle more sturdy. Btw I like your solution for the second axle steering on your truck-Its a nice idea

I cant take pictures of my truck with this set up, but D3K was the one that helped me it. I included the link of the drivetrain and how it works. I changed it to make it wider, but in your case (if you have 3 XL motors) you could power all three axles separately using this great setup.

http://bricksafe.com...iven rear axles

That is a really good idea. I'll have to try something similar to that over the weekend

Thanks everyone for all the help

Edited September 10, 201410 yr by Rishab N

Considering suspension: It definitely helps in most ways suspension does in real life, but one of the main problems in my experience is it takes up too much room. Especially live rear axles eat away at areas you could otherwise use for bracing. Maybe a simple double wishbone suspension setup for just the front axles will be a good idea?

So you are making more of a flatbed truck? Something to transport heavy machinery?

Looking forward to seeing some more progress.

Regarding fifth steered axle: You would probably need a fairly sharp Ackerman geometry on that one, seeing as it is so close to the driven, non-steered axles.

Do you have three XL motors, I would like to show you the option of using three motors to power three axles. If that is what you are going to do

Considering suspension: It definitely helps in most ways suspension does in real life, but one of the main problems in my experience is it takes up too much room. Especially live rear axles eat away at areas you could otherwise use for bracing. Maybe a simple double wishbone suspension setup for just the front axles will be a good idea?

So you are making more of a flatbed truck? Something to transport heavy machinery?

Looking forward to seeing some more progress.

Regarding fifth steered axle: You would probably need a fairly sharp Ackerman geometry on that one, seeing as it is so close to the driven, non-steered axles.

For now I think I'll go without suspension . And no what I was trying to say was that I want the dump truck to be in scale with 42030 so it can mimic more of a construction site. However if it proves too tough to make a linkage, a flatbed truck may be the way to go

I installed a fifth axle and it works great, however it doesnt go perfectly straight with the front axles and has a small angle of tilt to it. Its not too noticeable from a distance but the truck wouldn't be able to sdrive straight with it

Do you have three XL motors, I would like to show you the option of using three motors to power three axles. If that is what you are going to do

Sorry I don't have 3 but i'd still love to see it

I will try and have it built for this weekend, hopefully

Well it's been a long time since the last update, but I'm back and I've changed a lot.

Her's the usual overall shot. Since last time i've shortened the chassis by 4-5 studs and added a cab

Her's a pic of the overall cab. I decided to keep the 8258 decals so it has similar looks, but is 99 % original. Please give suggestions on how to improve the current looks. I also can't figure out a way to make good seats . Also how about that Imperial logo

The cab opens to reveal the 2 switches I placed there for lights

Here's a bottom shot. The drive is now 2 XL motors geared down to a ratio of about 5:1 (Thanks Sariel's calculator)

But wait where's the BB? its buried in there pretty deep, but it's actually quite easy to remove

Steering is done through knob wheels and a clutch gear

My next problem is how to route all these wires plus the pneumatics for the dump . i also have a faulty switch which simply doesn't work when I move it

Any solutions for that?

As always all suggestions and ideas are really appreciated

Looking good so far. I think you got some oil or something on your lense.

Looking good so far. I think you got some oil or something on your lense.

Thanks! I think my phone's camera is just bad as it's an old S2. Once I finish, I'll take some proper pics with a DSLR

Edited September 28, 201410 yr by Rishab N

I see! Sorry its a pet peeve of mine. The lens has to perfectly clean.