Automatic lowering of lifted axles under too much weight. Is it feature reall?

[💗Blaaashyyy💗]

Obviously asking about real trucking.

So is it mandatory in every truck and trailer that if too much weight is going to be detected on an axle it will lower itself when lifted, or is it always under drivers controll, or it's usually on a switch and it can happen both automatically or driver can controll it manually if that's his choice?

[Reese]

Simply a quality of life feature for the game as far as I know.

In real life, at least on US vehicles, lift axles can be automatically raised when you put the truck into reverse, or manually overridden to keep them down. I don't know of any truck that automatically lowers them when over a certain weight, though I'm sure it can be done.

[Jelinobas]

In the ATS/ETS2, the lifting axles are always lowered when you come out of the workshop or when you automatically couple your (own) trailer. You can set up shortcut keys for trailers and tractors and raise them. After picking up a load, they are all automatically lowered again. It can be lifted again as long as the load weight is not too high.

In real life it's more like you can lower whenever you want. However, do not raise if the axle weight for the entire vehicle would otherwise be exceeded.

[💗Blaaashyyy💗]

Originally posted by Jelinobas:

In the ATS/ETS2, the lifting axles are always lowered when you come out of the workshop or when you automatically couple your (own) trailer. You can set up shortcut keys for trailers and tractors and raise them. After picking up a load, they are all automatically lowered again. It can be lifted again as long as the load weight is not too high.

In real life it's more like you can lower whenever you want. However, do not raise if the axle weight for the entire vehicle would otherwise be exceeded.

Yes, you can lift them and drive full speed with them being lifeted if youre driving on empty trailer/no trailer or with a load that doesn't go over 9 tones. Then, with hevier cargo you can lift all axles, on truck and trailer but only up to speed of 30 kmh, and then they drop. But with too heavy cargo you cant lift any axles at all even if standing still. Know for a fact that you can drive full speed with lifted axles on truck and trailer with max 9 tones of cargo, havent checked the weight limits for the rest of mentioned scenarios.

But to be sure, IN REALL LIFE, you CAN OVERRIDE everything and lift axles on trailer or truck or both even if you haul 22/29 tones of cargo yes? That would be illegal to drive in such way on public road but you can lift them right?

PS: And to be sure again, it's not the lowering I'm concerned about, it's the lifting them up.

[Actively-Lazyguy]

the bendix TABS-6 advanced can be configured to lift or lower axles on trailers depending on weight and or speed . as well as stabiltiy and roll control

[💗Blaaashyyy💗]

Originally posted by Actively-Lazyguy:

the bendix TABS-6 advanced can be configured to lift or lower axles on trailers depending on weight and or speed . as well as stabiltiy and roll control

Again, but if you would want to do it, you can override it all and just lift all axles on tractor and trailer even if you haul 40 tones, right?

[metpei]

Basically it's all about max axle weights and tyres, what's legal and also physical limits.
Old trucks needed smart drivers since lift axles control were only a button on cabin.
Newer trucks sence when truck is loaded and automatically lowers lifted axles, also sensing system prevents lifting axles if there is too much weight.
Ofc toughest truck manufacturer Sisu this haven't been issue since 1960's. Sisu trucks can lift tandem axle even with max load (or more!).
Sisu Polar was first truck that could lift even powered tandem axle, with fully loaded truck, ofc!

[💗Blaaashyyy💗]

So now we have two conflicting informations. That you can, and that you can't override auto lowering axle when the weight is to big, in newer trucks. At least in EU trucks it seems.

[metpei]

old video https://www.youtube.com/watch?v=r3EEsVuVy_U

[Actively-Lazyguy]

this is what found for trailers

Manual Override
If manual control of the lift axle is desired, Bendix offers an easy-
to-use override kit. Simply connect the override harness to the
existing lift axle harness. Doing so will allow the lift axle to be
dropped to ground, remaining there as long as the switch is
activated.
link to source..
https://www.bendix.com/media/documents/products_1/valves/BW8042_US_000.pdf

so you can lower manual but not lift . i would think trucks would be similar . you got me curios so im looking . this is for new systems . worth noting with the right valves and switches you could make them do what ever you want . may not be legal but can be done

[Actively-Lazyguy]

so what i get from some googling . newer system are controlled by an ecu preventing raising an axle if over a predetermined (by the laws) weight. or under certain speeds . like the video metpei posted.

i found this among some regulation for ontario , cananda

When such optional controls are used, the axle will need to lift as soon as the switch is activated, but only stay up at speeds below 60 km/h. The axles will need to fully deploy as soon as a truck stops, when tractor power is turned off, or within three minutes of the switch being activated.

so old(no ecu)yes new(w/ecu) no

[💗Blaaashyyy💗]

And we can assume that under propper weight they wont lift at all, even for slow ride on short distance, stay up only on empty or very lightweight cargo, just like in the game. That fully answers my question, thanks!

[metpei]

Originally posted by Actively-Lazyguy:

this is what found for trailers

Manual Override
If manual control of the lift axle is desired, Bendix offers an easy-
to-use override kit. Simply connect the override harness to the
existing lift axle harness. Doing so will allow the lift axle to be
dropped to ground, remaining there as long as the switch is
activated.
link to source..
https://www.bendix.com/media/documents/products_1/valves/BW8042_US_000.pdf

Why made things so difficult, I don't get it. Naturally in europe you can always lower(!) lift axles, no matter have you empty or loaded truck (or tailer).

[💗Blaaashyyy💗]

Originally posted by metpei:

Originally posted by Actively-Lazyguy:

this is what found for trailers

Manual Override
If manual control of the lift axle is desired, Bendix offers an easy-
to-use override kit. Simply connect the override harness to the
existing lift axle harness. Doing so will allow the lift axle to be
dropped to ground, remaining there as long as the switch is
activated.
link to source..
https://www.bendix.com/media/documents/products_1/valves/BW8042_US_000.pdf

Why made things so difficult, I don't get it. Naturally in europe you can always lower(!) lift axles, no matter have you empty or loaded truck (or tailer).

What? You yourself said you can't always lift axles in EU. "Newer trucks sence when truck is loaded and automatically lowers lifted axles, also sensing system prevents lifting axles if there is too much weight."

[Actively-Lazyguy]

i think it becomes a matter of safety . for example cruising down the highway with one axle up putting 40.000lbs on an axle rated at 25,000 is asking for problems . taking control away from drivers or giving them one less thing to deal with . depending on how you want to look at it .

[Reese]

Being unable to lift an axle while overloading others could also be a safety concern. Say..... someone is trapped under the axle, or service is being performed and the only way to get a service tech out from under the tire is by lifting it because there's now no place to put a jack as the vehicle is over a pit, or occupied by the tech.

There should always be an override and it's scary to me that a computer would outright prevent it without any override.