Description Coupling trigger spring roll pin fits Alko couplings only. The electric override snap coupling does not fit other imported caravan or trailer couplings. If your coupling trigger is broken, your caravan or boat trailer coupling is pretty useless, and you need to replace it. Very simple to replace and costs much less than replacing the whole coupling. Knock out the old roll pin and fit the new assembly. Easy as that. Buying a whole new coupling is expensive and unnecessary if only the trigger is broken. Do a quick inspection inside the coupling while you are in the neighbourhood. Check that the adjustment screw is making contact with the tow ball. If loose, just give it a quick adjustment.
