is it safe to uncouple a loaded trailer?, will the legs hold it up?
Yes, and yes.
thanks 
Make sure its on solid ground- ie- concrete, not ■■■■■■■■■ & drop it gently, I always leave the tractor suspension in the middle/travelling position, wind the legs all the way to the floor (leave them an inch off the floor when empty) brake on, disconnect every thing then pull away from the pin, then drop the suspension right down before pulling totally away, that way, you can usually get under it again without too much bother.
If you drop it at the lowest setting, you’ll hear it Graunching & Clanging as you force it up the run up ramps, if you drop it at the highest setting, you wont have any more play in the suspension to lift the trailer legs/feet off the floor, then its Windy Miller time, winding on slow for a dozen turns. 
Check that the trailer is up to the job, new trailers shouldn’t be too much bother but some older/worn out trailers need a bit of TLC, some of ours are starting to bend, from in front of the legs & we tend to leave them coupled if they have a heavy load on.
Also, make sure that there isn’t 10 ton of Bricks or steel in front of the legs & nothing on the rear or you’ll leave the Arse in the air. 
martinviking:
Make sure its on solid ground- ie- concrete, not ■■■■■■■■■ & drop it gently, I always leave the tractor suspension in the middle/travelling position, wind the legs all the way to the floor (leave them an inch off the floor when empty) brake on, disconnect every thing then pull away from the pin, then drop the suspension right down before pulling totally away, that way, you can usually get under it again without too much bother.If you drop it at the lowest setting, you’ll hear it Graunching & Clanging as you force it up the run up ramps, if you drop it at the highest setting, you wont have any more play in the suspension to lift the trailer legs/feet off the floor, then its Windy Miller time, winding on slow for a dozen turns.
Check that the trailer is up to the job, new trailers shouldn’t be too much bother but some older/worn out trailers need a bit of TLC, some of ours are starting to bend, from in front of the legs & we tend to leave them coupled if they have a heavy load on.
Also, make sure that there isn’t 10 ton of Bricks or steel in front of the legs & nothing on the rear or you’ll leave the Arse in the air.
+1
Have know a trailer to collapse ( was a fridge trailer ) this was at Booker Livingston yep it was on level ground even though a lot of the bays are very uneven yep uncoupled as above had been emptied & reloaded ( from what I was told 20 pallets of bulk ) a couple hr later the legs gave way this put the bay out of action due to the diesel tank being broken when legs collapsed ( btw this boss did blame driver )
Here’s one at B&Q RDC Radlett, a Forkie had loaded a load of double stacked wall tiles on the front of the trailer, (no tractor attached) they reckoned that it was about 20 tons on the first 10 foot (in front of the legs)
(Think I’ve posted it before)
Whoops.
Bloody hell…mind you,it’s a good job someone put the cones there to stop someone hooking up to it.
funkybandit:
is it safe to uncouple a loaded trailer?, will the legs hold it up?
Dont drop a loaded tank or Pulk Tank
We used to uncouple fully laden trailers in our yard , it was a ■■■■■■■■ yard , so there were steel plates about a foot square that we put under the legs .
It surprising how much the neck drops when you uncouple tho ,as said pull out a bit so your clear of the pin then drop the suspension , then pull fully out 
This was on the secure load thread. Nuff Said !
