why even with new rubbers do they all leak 
or is it me
simple remedy. get a lump of fith wheel grease. smear it on the rubber on the unit+trailer coupling. no leaks
ok iāll let you know how it goes
I usually just spit on the rubber,does the trick.
A bit of lubrication also helps the rubber seal last longer,if not,the two rubbers twist against each other and split or go out of shape.
Quite why these are still in use is a mystery to me.
Unless I am missing something, male and female UK-type couplings are a vastly superior system.
I do the same as Keith, allways put a bit of spit on em. If theyre new rubbers, make sure theyre fitted properley before you gob on em 
Iām another one who gobs on themā¦or rather did. Havenāt had the āpleasureā for a couple of years now. 
Lucy:
Iām another one who gobs on themā¦or rather did. Havenāt had the āpleasureā for a couple of years now.
ricky get your finger out
fancy negleting your lass like that 
Ignore the title of this thread and it is bordering on the pornographic. 
Coffeeholic:
Ignore the title of this thread and it is bordering on the pornographic.
on for for bullys bar??
dont use grease,if it gets blown into the system it could bloke it up spit will dry up,grease will set hard
I prefer palms to C type coupling, at least they dont rust up and are a lot easier to connect when space is limited.
Harry Monk:
Quite why these are still in use is a mystery to me.Unless I am missing something, male and female UK-type couplings are a vastly superior system.
Not only are they very easy to use, but also the self-sealing versions (not many taps left today, I sāpose) are failsafe. What about the C-type couplings with the pin that is meant to open the valve in the yellow line but due to wear, doesnāt actually operate properly? No such problem with a palm. Apart from compatibility with foreign units, that is one reason why W. H. Bowker continue to operate all their fleet, both UK & International, on palms.
Just so you are aware, dont spit on them with that gay wet spittle. Cough up a great big greeney with loads of mucus and gob in itā¦
That way when you come to do a trailer change you can always ā ā ā ā it off the palms, warm it up in your mouth and use it again.
But then againā¦ i always use grease, myself.
r slicker:
simple remedy. get a lump of fith wheel grease. smear it on the rubber on the unit+trailer coupling. no leaks
Always worked for me with RHs 1000 knackered old tilts
And i also prefer them to the uk style coupling, far easier to use in limited space as wheelnut said.
Perhaps a timely reminder, at this time of year, with all the salt and rubbish about on our roads, for UK type coupling, with a full fuel tank, dunk the ends of the couplings into the tank. Diesel is essentially a light āoilā, It makes life so much easier.
Wisharts did some work for a European company. Lifting loaded trailers from the dock at Rosyth, delivering the load and reloading before delivering them back to the dock. As a result, we carried palm coupling adaptors. They saved my bacon one evening.
I was heading to Ireland, via Cairnryan and had been told not to fill up in the UK as fuel was much cheaper in the south of Ireland, where I was going.
I thought my fuel was a bit low, for me to get to the south, so stopped at Newbridge to put a couple of hundred litres in. Just as I jumped out of the cab, the staff came out of the shop and taped off all the pumps. Apparently their computers had just crashed so they couldnāt dispense any fuel. I checked my tanks and reckoned I would be ok, but just to be safe Iād put a couple of hundred litres in somewhere else on my route.
I decided to go M74, A701 to Dumfries then along the A75. The M8 in Glasgow was going to be a nightmare by the time I got over there. Everything was going to plan until I noticed that my fuel gauge was dropping at an alarming rate and I still hadnāt seen a fuel station which would accept our cards.
On checking the handbook, the next place wasnāt until Creetown. About 5 miles before Creetown, my engine coughed a few times then died. I managed to roll into one of those deep lay-bys luckily. On checking my tanks again, the right hand one was dry but the left one was still half full, so fuel wasnāt transferring across. I double checked that both taps where still open, they were, then phoned the boss who said the only option was to call out Scania. They told me it would be at least 2 hours before a fitter could get to me. 
Having a think about things as I waited, I decided to have a go myself.
I made a do-nut from a large plastic bin bag, to try and seal the neck of the tank. Disconnected my red line, put my red line palm coupling over the neck and connected the red line to it.
90psi into the tank was enough to start fuel flowing across.
I then discovered how to bleed a common rail injection system, got her fired up again and managed to get to Creetown just 2 minutes before they locked up for the night. I remembered to phone Scania again, to cancel the recovery/fitter and my boss to tell him Iād sorted it myself. 
Did a similar thing in Oz with my Mack, Simon. Because the old Macks had air starters we all carried a long airline in case we needed to pump up empty air tanks from the tyres in the morning. This became equally useful for transferring fuel in the way that you describe.
neat trick go directley to the foot of the stairs