[HELP] 42030 Build error and which MODs to do?

[tgrbailey]

Hi All,

Fairly new to the forum after getting 42030 for my birthday at the start of December and slowly building it with the "help" of my 3 year old little boy :-) - to be fair he got the hang of it fairly quickly and built the engine on his own :-)

This is my first studless build since coming out of approx 24 years of my "dark" ages - I think the last model I built was either 5550 Model Team Custom Van or 8872 Technic Forklift Transporter

So I've made a schoolboy error with this first build (can I blame the boy??) and the bucket arms don't go up

and down :-( - all the other functions work fine. I think I have identified the issue, I missed off the cog on instruction 7 on page 115......

I've had a bit off a search round the forum and used my brain a fair bit and it seems like a major dismantlement is required to resolve this. So my first question is, does anyone have so bright ideas on a quickish/easy fix?

If not and I need to rebuild I figured I may as well sort out a few of the "bad" bits, namely the steering! I've seen several solutions to this, what is the general consensus to the best? I am thinking actuators?

What else is recommended to make this model ultimate?

One thing I'd really like is working lights (front, back and flashing) and maybe a horn/reversing beep - has it been done/any advice on that?

Now I need to contemplate the rebuild work on this or getting stuck into my Christmas present 42043 Mercedes!

Sorry for the rather long initial major post (rather than odd cheeky comment) really enjoying the forum it seems a really friendly place that stimulates some great discussion on new sets on MOC/MOD work, I can't wait until I am skilled enough to enter a comp!

Cheers

Tim

PS as I am sat here writing this my wife is building her 1st Lego set ever which I got her last week as she was feeling left out - apparently it's all easy, she's currently sifting through 2000 odd prices of 10243 Parisian Restaurant as she insisted on emptying all the packets into one not overly large box :-)

[dr_spock]

Quick and easy fix? Maybe you can ask your wife to fix 42030 for you.

Easy steering fix could be to use an IR train speed controller to steer the servo motor. No rebuilding or mini-LA required.

[tgrbailey]

Quick and easy fix? Maybe you can ask your wife to fix 42030 for you.

Easy steering fix could be to use an IR train speed controller to steer the servo motor. No rebuilding or mini-LA required.

LOL - I did ask if she had any bright ideas and she just rolled her eyes and asked how I could of missed it! She's just gone back 5 pages on her's as she missed something, I managed to control my smile though!

Good idea on the steering, I have got such item as I have just acquired a 7898 Cargo to build with Thomas, I think that has such a controller so I'll go and dig it out !

Thanks Tim

[paul_delahaye]

I can't tell you how to fix it, but from experience, I often find I miss the odd part during larger builds, and after traipsing through the instructions, I find you can usually dismantle the model in chunks, rather than peace by piece.

Just start around the area you need and logically pull apart the big pieces. You may even be able to get to the gearbox within a couple of minutes, and squeeze that cog in.

I too missed a cog on the crawler crane, and the gearbox only worked in one direction, so I know the feeling.

[RohanBeckett]

while I don't have this set, I do have it's smaller brother from a few years ago..

with anything that drives 2 linear actuators - ensure that the driving cogs are on the correct sides (directly behind the linear actuator shaft) - double check the instructions.

You'll be able to install them 'opposite' - and if you do, they'll just fight against each other, and not work at all.

Usually the instructions have warnings on those pages, telling you to be careful how you place the gears! :)

I just downloaded the PDF - check around step 90/91... is the bevel gear, in substep 5, correct, on your model, vs the instructions?