@md1987 what way? More information needed.
Pulling the pin before trailer brake. On split coupling in the UK Iām talking about.
I would never suggest that! Why? Absolutely no gain. Apply trailer brake , legs, pull pin, pull forward, then disconnect.
I would never pull the pin, pointing uphill, without the trailer brake applied, conversely I would not pull the pin without the pm brakes on, facing downhill.
There have been occasions when I have had to pull the pin without the brakes applied at one end, due to excessive weight on the jaws.
Recognised road train make up areas are level. I donāt recall ever having to make or break a road train, anywhere with a significant grade, official or improvised.
ive only had time to watch the first bit of the video so maybe a silly question but are those dollyās used for all subsequent trailers. If so is it done so that the trailer will always act in the same way when reversing
Cooper, any combination of A and B trailers can be used, to a maximum length of 53.5 metres. Suspension group loading generally dictates specifications.
i found this one
be interested in your opinion
Yeah, he got the job done. I always check that the taps on the back trailer are off.
There are many ways to skin a cat, just because someone does the job differently to me, doesnāt mean theyāre doing it wrong. As long as the aim is achieved damage free, safely and in a timely manner, as you blokes would say, ājobās a goodunā.
A regular job I used to do was three trailers of fuel from Port Hedland to Karratha, with 3~4 drops. Road trains are not allowed in Karratha but B doubles are. This necessitated running the trailers in singley.
On the highway, out of town, I would pull the pin on the back trailer then pull forward far enough to get the prime mover under the trailer. Repeat for the second trailer. The dollys are still connected to trailers 1 and 2. Then drop the lead trailer and hookup the the back trailer, deliver that and try to drop that where I can have 50 metres clear forward of it.
Pickup the second trailer, complete with dolly and deliver that. Return and hook it up to the empty back trailer. Set airlines, taps and signs etcā¦ Deliver the last (front) trailer, then on return, usually in the dark, Iāve only got one set of suzies to connect and the front signs to uncover.
Fortunately this area is as flat as a billiard table so no brakes need to be applied. Getting full air to the back trailer can take up to five minutes. Use this time to do a final walk around making sure all the lights are working, everything is secure and I hadnāt forgotten anything in the assembly.
Some of the fellows delivered their trailers in the opposite order. Both ways were right.
I also used to do Roebuck and Broome, the former was one (back) trailer delivered first. Once that was discharged, it would be left at the roadhouse, on its dolly. Broome was 30 kilometers from the roadhouse and supposedly no road trains allowed. Depending on the time I finished at the roadhouse, if it was late Iād sneak into Broome under the cover of darkness as a double, discharge and sneak back, hookup the abandoned trailer. In summer Iād shower, eat and wait for darkness to do the Broome delivery. Shower, eat and go to bed, returning to Hedland the next day.
Different methods for different tasks.
Iāve already expressed my opinions on coupling/uncoupling and sorry to say that bloke irritates me for some reason so I muted him. But I saw a bit of his toing and froing with the steering wheel and that accords with my own thoughts on reversing multiples,
You have to keep throwing them off to keep them going back where you want them, thus light power steering is a great help. Back in the '80s and '90s when I was training my drivers with wagon and drags (same principle but trains need an extra extension of thought and comprehension), the steering was light enough with our F10s but personally I found a steering knob handy to make it even easier for a light touch and fast reaction.
I did write a lot more but it was getting very complicated. Briefly you have to think what you have to do to make a trailer go left for instance. Then you have to think what you have to do to the preceeding trailer to achieve that end. It is clear in my mind, but not so clear when I write it all down. 
Steering knobs are illegal here.
We have a lot of them behind the wheel here! 
Wow!! Mind you with modern feather light power assisted steering, hardly needed.
Still be handy Spardo, a forklift has light steering but I wouldnāt want to operate one without, a speed knob fitted.
Is that national or just QLD?
National I think, it would contravene ADRs concerning dangerous intrusions.
They were banned in Queensland before we had Australian Design Rules.
And hereās me thinking Aussie Rules was footie. 
Seriously, though I wouldnāt have admitted it in Sydney, I preferred what they called 'aerial pingpong; to Rugby League. Only seen it on telly though. 
I never had you down as a heretic, Spardo. 
Aerial ping pong, cross country basketball, played by pansies, three half times in every game. 
Haha, as I said, never seen a live game myself, nor RL come to that, until I got back to England anyway, but I knew how strong the feeling was in both camps.
As a taxi driver in Sydney I was often dropping people off and picking them up from the magnificent building that fronted the St. Georges Leagues Club, but never went inside. 
We have a lot of Knobs steering vehicles here though,
Why are Steering Knobs illegal ? best thing out i find allways use one and have done for many years,
All adaptive control modifications such as left foot accelerators, steering wheel spinner knobs and control extensions etc. require modification certification by an authorised AVC, and a modification plate issued.