A locking pin assembly for securing a ground engaging element having side openings to a support structure alignable with the side openings, the locking pin assembly comprising: a body portion having a non-circular profile and being arranged to non-rotatably, selectively extend into the support structure; and a shaft portion disposed within the body portion and rotatable between a locking position and a release position, the shaft portion having an opening formed therein; the locking pin assembly further comprising and characterized by : a camshaft rotatably disposed within the opening of the shaft portion , the camshaft being arranged to cooperate with the shaft portion to freely rotate within the shaft portion through a first range of motion and to apply a rotational force on the shaft portion through a second range of motion; and a radially extending locking element carried by one of the shaft portion and the body portion and configured to selectively mechanically interfere with the other of the shaft portion and the body portion to selectively prevent rotation of the shaft portion relative to the body portion when the shaft portion is in the locking position in which the locking pin assembly mechanically inhibits removal of the ground engaging element from the support structure, and to permit rotation of the shaft portion relative to the body portion when the shaft portion is in the release position in which the locking pin assembly permits removal of the ground engaging element from the support structure. a body portion having a non-circular profile and being arranged to non-rotatably, selectively extend into the support structure; and a shaft portion disposed within the body portion and rotatable between a locking position and a release position, the shaft portion having an opening formed therein; the locking pin assembly further comprising and characterized by : a camshaft rotatably disposed within the opening of the shaft portion , the camshaft being arranged to cooperate with the shaft portion to freely rotate within the shaft portion through a first range of motion and to apply a rotational force on the shaft portion through a second range of motion; and a radially extending locking element carried by one of the shaft portion and the body portion and configured to selectively mechanically interfere with the other of the shaft portion and the body portion to selectively prevent rotation of the shaft portion relative to the body portion when the shaft portion is in the locking position in which the locking pin assembly mechanically inhibits removal of the ground engaging element from the support structure, and to permit rotation of the shaft portion relative to the body portion when the shaft portion is in the release position in which the locking pin assembly permits removal of the ground engaging element from the support structure. a camshaft rotatably disposed within the opening of the shaft portion , the camshaft being arranged to cooperate with the shaft portion to freely rotate within the shaft portion through a first range of motion and to apply a rotational force on the shaft portion through a second range of motion; and a radially extending locking element carried by one of the shaft portion and the body portion and configured to selectively mechanically interfere with the other of the shaft portion and the body portion to selectively prevent rotation of the shaft portion relative to the body portion when the shaft portion is in the locking position in which the locking pin assembly mechanically inhibits removal of the ground engaging element from the support structure, and to permit rotation of the shaft portion relative to the body portion when the shaft portion is in the release position in which the locking pin assembly permits removal of the ground engaging element from the support structure. <EOS>