I need to remove a rear wheel for a puncture repair, can anyone offer a suggestion for removing the split cotter on the rear wheel. I have removed the pin through the axle shaft and slackened the cotter nut but access to knock the bolt out is severely restricted within the wheel rim. I've tried WD40 but don't think that will do it. The wheel rim bolts are facing inwards so it is not possible to remove the wheel from the hub.