Drove three axle tractor unit today,only light load on so left axle up. But was wondering at what weight do u put it down?
You’ll find most if not all nowadays will go down on their own when at a certain weight so let it do it’s own thing.
Check the weights on the plate it will tell you what weight for each axle etc. Take it from there 
I don’t think there’s any truck that doesn’t do this automatically now.
First time we got Scanias, they sent a guy out to show us the ropes, and he said it is good practise to always leave the middle axle down except for when unit only, which is what I have always done since.
I leave the mid axle up until it goes down of its own accord due to the weight carried. Last two weeks I’ve been in a 60 plate Volvo that stays up regardless until you flick the switch in the cab, usually indicated by the axle light flashing on the dash display.
espresso:
First time we got Scanias, they sent a guy out to show us the ropes, and he said it is good practise to always leave the middle axle down except for when unit only, which is what I have always done since.
espresso:
First time we got Scanias, they sent a guy out to show us the ropes, and he said it is good practise to always leave the middle axle down except for when unit only, which is what I have always done since.
i’ll bet he’s moved on now to running dcpc courses .
If you drive an actros , you don’t need to worry. Stick an extra pillow on your bunk even when solo and it’ll drop the bloody axle!
espresso:
First time we got Scanias, they sent a guy out to show us the ropes, and he said it is good practise to always leave the middle axle down except for when unit only, which is what I have always done since.
This must be a wind up?
Boris1971:
Drove three axle tractor unit today,only light load on so left axle up. But was wondering at what weight do u put it down?
I never put it down off my own back we got some Volvos (58’s) they can override the auto drop it and the light was flashing like billy o all the way home didn’t realise it had been overridden.
24pls of tates on lmao.
The truck will either do it, it’s self or ‘tell’ you to do it. You get better traction with it up.
scaniason:
If you drive an actros , you don’t need to worry. Stick an extra pillow on your bunk even when solo and it’ll drop the bloody axle!
Lol I agree
In theory it shouldn’t go down until you are over 40t, but that is in an ideal world and you are pulling a tri axle trailer and the load is loaded properly, i.e weight is spread evenly.
Thanks for your answers fellas.
rigsby:
espresso:
First time we got Scanias, they sent a guy out to show us the ropes, and he said it is good practise to always leave the middle axle down except for when unit only, which is what I have always done since.i’ll bet he’s moved on now to running dcpc courses .
pffft… 
great for empty wet grip, must be a barrel of laughs pulling out on a wet busy junction.
How far off the ground should a mid lift run when empty? I can’t get my boot under mine and if I have anything near 10t on its on the floor even when lifted.
Ady Williams:
How far off the ground should a mid lift run when empty? I can’t get my boot under mine and if I have anything near 10t on its on the floor even when lifted.
Used to be the same when i had a twin steer Scanny, the mid lift used to touch the road regularly with just normal suspension movement, that was car transporter spec though and a too high drive axle lift would have seen worse scraping of the road from the trailer r send if any higher.
Those with fixed small wheel midlifts raise the axle well clear, helped by the (unecessary with small wheel mid) raising of the drive axle suspension…this extra lift often leading to the ‘missing the king pin completely’ episodes in the other thread.
Maybe your set up isn’t lifting the drive axle enough.
espresso:
First time we got Scanias, they sent a guy out to show us the ropes, and he said it is good practise to always leave the middle axle down except for when unit only, which is what I have always done since.
Did he have his hands on his hips and laugh out load when he said it? I bet the workshop lads and company love you going through tyres for no reason.
Is it ok to lift/lower the drive axle to give the lift axle a bit of clearence and drive with it? I normally use road position on the remote.
I normally run with my lift axel up as not a lot of weight on although sometimes have to put it down ( 56 scanny )
If you drive with the lift axel you can save upto 10% of fuel as well as saving on tyres