Jim

[MOD] 42070 - 6x6 All Terrain Tow Truck - Mods and Improvements

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1 hour ago, suffocation said:

Hi Jim, do you think the track width could be any narrower without the wheels bumping into the chassis or the bodywork?

At the rear without a problem. The front will need some tinkering though. Two liftarms and connectors need to be repositioned. And maybe they will hit the front "fender" (not sure how that is called).

If you are redesigning the chassis anyway, you can try to apply this mod. I would love to see the resultĀ :thumbup:

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i'm almost tempted to buy it and make it better (not read your review yet, Jim).

H

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Just now, Horace T said:

i'm almost tempted to buy it and make it better (not read your review yet, Jim).

H

If you don't mind the price and like to MOD a set, this is theĀ set for you. You can have a lot of fun rebuilding this set. In that way it's more fun than a "perfect" setĀ :tongue:

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4 minutes ago, Jim said:

If you don't mind the price and like to MOD a set, this is theĀ set for you.

That alone makes me want to consider buying the set!Ā :wink:

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54 minutes ago, Jim said:

At the rear without a problem. The front will need some tinkering though. Two liftarms and connectors need to be repositioned. And maybe they will hit the front "fender" (not sure how that is called).

If you are redesigning the chassis anyway, you can try to apply this mod. I would love to see the resultĀ :thumbup:

Thanks! I guess it's easier to redesign the whole thing.

This is a quick mock-up with central and rear locking diffs, high-low gearbox and live axles (notice the front diff mounted the wrong way - I've had those axles around for a while and couldn't be arsed to turn the diff around just for a mock-up). The trackwidth is narrower than 42070, whereas the wheelbase should be pretty close.

(Edit: the wheels are all mounted the wrong way around, too :grin: )

800x450.jpg

800x450.jpg

Ā 

Edited by suffocation

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Dude!! Nice workĀ :thumbup:

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29 minutes ago, schraubedrin said:

Question: Wouldn't it be enough to lock the front differential to get quite a lot more truck trial capability?

The priority for locking would be 1) centre 2) rearĀ  3) front

Locking only the front would make it a 2wd with no steering capabilty. Locking the centre would give you min 3wd - one wheel on each axle.

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9 minutes ago, valenciaeric said:

The priority for locking would be 1) centre 2) rearĀ  3) front

I understand the 2wd / 3wd argument. But isn't it far more probable that one wheel on one axle looses contact than one whole axle loosing contact?

14 minutes ago, valenciaeric said:

no steering capabilty

I've got to admit, i completely forgot about steering :laugh:

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If one front wheel loses traction then all torque will go to that wheel with an open centre diff. If you lock the front diff then you will have less efficient steering and any slip from the rear wheels will transfer torque to them.

Ideally, it is best just to eliminate the centre diff as the turning circle is so wide anyway and there are no drive shafts to break, just uni joints on the front.

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15 minutes ago, valenciaeric said:

any slip from the rear wheels will transfer torque to them

I understand. I thought that it might be improbable that both rear axles will lose grip.

Anyway, thanks for this short lecture on diff locking, i quite enjoyed it :classic:

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8 hours ago, Chase Rosipayla said:

To Jim,

Well some of us make money having fun.

Me too, but that doesn't involve LEGO :laugh:

(at the most, I am saving some money)

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Lower the whole thing, remove the outriggers, use independent suspension on all wheels and swap out the bed for 4 XL motors and a W16 engine.

Maybe, we can call it a dakar truck or something.

(basically a fast version without all the tow truck functionsĀ :3)

Ā 

Ā 

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Just now, MattL600 said:

...remove the outriggers...

NooooooooĀ :tongue:

On 18-7-2017 at 8:47 PM, suffocation said:

This is a quick mock-up with central and rear locking diffs...

Any progress on the chassis?

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16 minutes ago, Jim said:

Any progress on the chassis?

Not yet - but I started building a new crane, which is basically the same as a design I used on another tow truck.

(I have no idea why Bricksafe keeps flipping the second picture - is it because it's too penile?).

800x450.jpg

800x450.jpg

Ā 

Ā 

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1 hour ago, suffocation said:

Not yet - but I started building a new crane, which is basically the same as a design I used on another tow truck.

(I have no idea why Bricksafe keeps flipping the second picture - is it because it's too penile?).

Nice work, looking forward to this!Ā :thumbup:

I had the same problem with one of my photos and have already alerted Nathan to it. He's working on it (I hope)Ā :classic:

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Hi all,

As this is a mod topic, I have one for you.
I the pictures you can see the HOG I've made using the second gear on the gearrack.

800x600.jpg800x600.jpg

Replacing the batteries is still possible, you only need to remove the gear.

800x600.jpg800x600.jpg

It took me about 30 minutes to build.
The hardest part was removing the 3L axle with stop and placing a 4L with stop.
And I had the tan gear on the wrong side, so it turns the wrong way.

You are free to use it and/or improve it.

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a spring loaded suspension on the last axle to raise the groundcontact in offroad conditions

35527261853_970f057d9c_c.jpg

36335767285_1ce6d34a29_c.jpg

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Some monkey is hanging around

35535728064_7e5b107a42_c.jpg

Closed the unfinished flatbed
35974721400_c97e1cd610_c.jpg
This gap hasĀ  to be closed too
36371676345_ae11cc8de5_c.jpg
36371675645_6dbf603175_c.jpg

strenghtened frame

36217778181_0b74c6bf7d_c.jpg

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