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

[Jim]

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 result 

[Lakop]

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

H

[Jim]

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 the set for you. You can have a lot of fun rebuilding this set. In that way it's more fun than a "perfect" set 

[BrickbyBrickTechnic]

4 minutes ago, Jim said:

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

That alone makes me want to consider buying the set! 

[suffocation]

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 result 

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 )

 

Edited July 18, 2017 by suffocation

[schraubedrin]

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

[Jim]

Dude!! Nice work 

[valenciaeric]

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) rear  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.

[schraubedrin]

9 minutes ago, valenciaeric said:

The priority for locking would be 1) centre 2) rear  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

[valenciaeric]

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.

[schraubedrin]

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

[Chase Rosipayla]

To Jim,

Well some of us make money having fun.

Edited July 20, 2017 by Chase Rosipayla

[Jim]

8 hours ago, Chase Rosipayla said:

To Jim,

Well some of us make money having fun.

Me too, but that doesn't involve LEGO

(at the most, I am saving some money)

[MattL600]

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 functions :3)

 

 

[Jim]

Just now, MattL600 said:

...remove the outriggers...

Noooooooo 

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?

[MattL600]

8 minutes ago, Jim said:

Noooooooo 

 

But... 42070 hot rod?

 

[suffocation]

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?).

 

 

[jotta93]

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! 

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

[Paknaloid]

Maybe just build this instead 

https://rebrickable.com/mocs/MOC-8976/Ivan_M/military-recovery-truck/#info

[nick97]

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.

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

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.

[Aventador2004]

Nice! I don't think I will get this, so I can only look. Good mod.

[efferman]

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

[efferman]

Some monkey is hanging around

Closed the unfinished flatbed

This gap has  to be closed too

strenghtened frame

[Paknaloid]

@efferman monkey upvote for the HoF

[efferman]

A official creator set into the hall of fame?