Cheers guys I was thinking it could be the pump.
To be honest I'm not sure what trolley it is as had it off a friend who used to be a windie.
I usually use my pure freedom but have van mounted that one.
This one is a 40litre trolley with all the workings built in the back so no way of finding out unless I strip it

Just hope it can keep going as don't want to buy another trolley
