Heres the photo of my hitch, and you will clearly see....another problem. The casting is quite brittle, I expect I've got a bit to much torque on it, and it has split. Fortunatley I've been able to order some repair epoxy for such things, and will add a couple of straps. The bolts holding the hitch were waisted so I was taking the opertunity to remove and replace. OH ^%$£"!!!! st But it does give you a chance to see inside the beast. The ring end of the push bar has two collors to secure it, so I assume you have to unscrew the ring to remove it. The internal and external spring are seperated by the casting body., the push end is just threaded with a large nut.
Right = ring end