Same happened to me, same pump different brand. I removed the pin and the shaft through the head, wrapped some thermoplastic around the hole and glued it together to make it airtight.
You just then need to get a quick release pipe clip. When you clip it up tight you can charge up the tank, then release it when you need the air.
I know I'm late to the conversation, but do you know the size of that clamp? I'm going to order one. Was it difficult to remove and re-attach the hose?
Same happened to me, same pump different brand. I removed the pin and the shaft through the head, wrapped some thermoplastic around the hole and glued it together to make it airtight.
You just then need to get a quick release pipe clip. When you clip it up tight you can charge up the tank, then release it when you need the air.