.what suspension level corectly must keep in trailers,or in rigid lorry.yes basicly drivers drive and drive.but what is corectly if loaded and empty.what is better for truck stability,for reversing.in normal road any level good(just if not touch mudgard),but in ice and bad weathers,as well if road have harsh bended???what is correct.■■?
The correct one is the one that doesn’t light up the tell tale on the dash. IMO travelling with suspension up/down should only be done to get you out of a sticky (or slippy) situation, ie transferring weight about, for trailer clearing catwalk/tank on uppy downy bits.
The normal ride height is set in the workshop. Use that.
Exactly the same height loaded as empty.