Hi G.Brookes,
I have freedom trolley in bits at mo
Now using pump box from daqua.
http://www.daqua.co.uk/pumps_controllers.htmI had drips from pump on freedom trolley and disconnected hoses of blue connectors on pump.
Then undid blue pump connectors, used white ptfe plumber tape, wind around blk pump screw thread, then screw blue connectors back on to grind in white tape.
Undo blue connectors and take off again and then put on abit more white tape then screw blue connectors back on properly.
Then hoses back onto blue pump connectors but I used jubilee clips so can screw on tightly and take off easy if ever needed not like them o rings :
Hope this helps, I think freedom trolley is great but a real pig when things go wrong as everything is hard to get to.
I once sent my trolley back to pure freedom when the battery packed up and got them to change battery, pump and controller while they were at it.
They sent tnt courier to my place to collect and sent back when done, think it was turned around in two days
If your not doing so may i suggest using your trolley as a vanmount system I was, using 100 m 6mm microbore hose.
So much easier work wise and on the back; i can't belive how long i pulled trolley around 6 years
I hope this helps re pump problem as i couldn't get that video on you tube to work.
lee