dew:
I think he means the gap between the cab and trailer reducing and crushing the operator against the side of the cab.I would have thought the only time that could happen would be if the unit and trailer are at different angles either sideways or up/down
or he’s missed the pin
I’m a novice so be gentle with me…connected up, brakes on, connected red line and trailer sank several inches towards the cab. Could it be that I’d left the suspension high on the unit when picking up the trailer? Have me a shock at the time.
kvin:
I’m a novice so be gentle with me…connected up, brakes on, connected red line and trailer sank several inches towards the cab. Could it be that I’d left the suspension high on the unit when picking up the trailer? Have me a shock at the time.
Are you sure the trailer pin was locked in the jaws?
Otherwise anything suspension adjustment wise shouldn’t produce any too significant movement.
it happens , we have at least one trailer that does it when its loaded . im pretty certain the trailer is’nt rolling anywhere , although i cant see around the trailer to check ( neck not long enough ) and i cant be arsed asking anyone to check .
provided you’ve got the pin ( you should have checked ) and provided you have applied the unit handbrake ( you should also have checked that ) nothing bad is going to happen . the way i see it its just the trailer settling down , i have no other explanation for it as im no expert . no puppies or kittens will be killed or anything else for that matter .
so back under the trailer do your tug test ( twice at least ) and make sure you’ve put the unit handbrake on and life will go on as normal .
if it happens under no circumstances scream like a girl you will get laughed at and or beaten up …
bowser:
it happens , we have at least one trailer that does it when its loaded . im pretty certain the trailer is’nt rolling anywhere , although i cant see around the trailer to check ( neck not long enough ) and i cant be arsed asking anyone to check .provided you’ve got the pin ( you should have checked ) and provided you have applied the unit handbrake ( you should also have checked that ) nothing bad is going to happen . the way i see it its just the trailer settling down , i have no other explanation for it as im no expert . no puppies or kittens will be killed or anything else for that matter .
so back under the trailer do your tug test ( twice at least ) and make sure you’ve put the unit handbrake on and life will go on as normal .
if it happens under no circumstances scream like a girl you will get laughed at and or beaten up …
Hmmm. That’s a new one. 
Who started this load of nonsense it’s really not worthy of space.
can i suggest something
get the bleedin mr know it all jobs for the boys milkman out the office
and show him the pincing happening when you connect red air line to trailor
Saratoga:
Thanks for that BowserFYI I have a spell checker installed here in Firefox because I often get the i before e bit mixed up as well
Normally, it is the i before the e except after c
Thats how I know it but a few words I can’t think of contridicts that but that is the general rule
peterm:
bowser:
it happens , we have at least one trailer that does it when its loaded . im pretty certain the trailer is’nt rolling anywhere , although i cant see around the trailer to check ( neck not long enough ) and i cant be arsed asking anyone to check .provided you’ve got the pin ( you should have checked ) and provided you have applied the unit handbrake ( you should also have checked that ) nothing bad is going to happen . the way i see it its just the trailer settling down , i have no other explanation for it as im no expert . no puppies or kittens will be killed or anything else for that matter .
so back under the trailer do your tug test ( twice at least ) and make sure you’ve put the unit handbrake on and life will go on as normal .
if it happens under no circumstances scream like a girl you will get laughed at and or beaten up …
Hmmm. That’s a new one.
different kind of tug you dirdy sodd … 
bigtruck:
Who started this load of nonsense it’s really not worthy of space.
im still convinced it was the op having a carlzberg moment … they do happen .
HTH
Juddian:
Before we had air parking brakes on trailers we almost never used the park brake, 90% of the blighters were seized solid more than a week either side of MOT, you’d spend twenty minutes trying in vain to free the bloody ratchet off and when you released it had to kick the cable to pull it through.Don’t recall any problems, no one was ever crushed, about the only problem was those who didn’t check if there was some air in the thing sometimes ended up chasing it down the yard, but you can’t legislate for or train monkeys.
Unless the driver has missed the pin completely and connects up the airlines with the king pin perched in front of the 5th wheel, i can’t understand what the problem is…unless its a split coupling issue, when Darwins theory comes into play.
You took the words right out of my mouth on every single point 