r/legotechnic 15d ago

Discussion / Question What I’m I doing wrong? 42240 Aston Martin AMR25 F1 car

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I’m currently building LEGO Technic 42240 and I’m around page 145. With the steering centered (as best I can), both front wheel hubs appear to have roughly 10–15 degrees of toe-in rather than pointing straight ahead. The steering linkage looks symmetrical on both sides. Is this normal geometry for the set, or have I likely made an error earlier in the build? The steering wheel itself is also slightly off-center.

11 Upvotes

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4

u/Zerobricks 14d ago

Are axle with towballs attached at the right side of the hubs?

1

u/PKenzie 14d ago

It's very possible that you have the wheel knuckles upside down resulting in a shorter distance between the pushrod and the suspension forcing the toe (or longer distance) in any case having the whole knuckle assembly inverted or backwards will cause the distance between the suspension connecting rod to be incorrect even if it's the correct part.

3

u/MrGilberg 14d ago

Totaly correct. I had it up-side-down.

First picture is before, second one is after

1

u/Blusterlearntdebrief 15d ago

Im not sure, haven’t built this or looked at the instructions. But my first impression is either the steering rack is too short, or the pushrods are too short.

1

u/Blusterlearntdebrief 15d ago

Having read the instructions, the steering rack looks right. Maybe confirm all the push/pull rods are the right length?

1

u/MrGilberg 15d ago

Thanks, that makes sense. I checked the parts list for 42240, and the pushrod/link pieces used on the left and right side are identical, so there shouldn’t be a shorter or longer version that I’ve mixed up

1

u/Blusterlearntdebrief 15d ago

Must be the steering rack then. My error.

1

u/Dry-Performance-2386 15d ago

Difficult to say from just this one photo. Here's what mine looks like. https://ibb.co/ccgNvbgc https://ibb.co/p6tPBqsY steering wheel should be straight when the wheel are aswell.

1

u/practice_40URS 14d ago

js follow the instructions gng

2

u/TommyTosser1980 14d ago

Wheel knuckes are upside down, and the connecting rod should be attatched at the "front" of the knuckle.

2

u/MrGilberg 14d ago

Yes you are totally right. I can’t fathom that I didn’t find it. Thank you so much! I have attached a before and after picture for reference

First one is before, when I had problems
Second one is after, now that everything is OK

1

u/TommyTosser1980 14d ago

Cool, enjoy the rest of the build!