I found this bit of useful info on the AL-KO website, it explains how to fix the AKS 1300 hitch ratchet wheel if it jams

The ratchet has jammed because the wheel has been turned too far when unwinding. It is only necessary to turn the wheel until you first feel resistance or one click of the ratchet. What has happened is the small circlip in the centre of the wheel has become embedded in the black plastic surround.

To resolve this issue use a 13mm socket or similar, place it up into the centre of the wheel so that the socket is sitting on the black plastic and the centre pin will go into the socket. You then need to apply force with a hammer which will release the circlip, and the ratchet wheel.

A fair amount of force may be required depending on how far it has been over unwound. It would be recommended to rest the coupling on the towball as you do this, to offer support.

Are you having problems John? I changed the pads in mine

How to: Change the Pads in an AL-KO AKS 1300 STABILISER

And the pdf files on the 1300

AlKo AKS1300 Stabiliser

No problems thanks Nev, I was looking for something else on the AL-KO website......