You need to remove the rear inspection cover. As you rotate the carrier around you will find a small pin/bolt that secures the center shaft of the carrier. Once the pin is removed, the center shaft can be slid out of the carrier. Once thats out of the way, the axle can be slid in enough to get the C clip off the shoulder on the axle. All of this should be covered in the technical manuals that are available as a free download here on Steel Soldiers.