Abstract: An excavating tooth point is captively retained externally on an adapter nose with a specially designed lock structure removably received in a side wall opening of the tooth point and an underlying opening in the adapter nose. The rotary lock structure includes a cylindrical body having a side portion from which a resiliently biased force exerting member and a spring-loaded detent pin outwardly project. With the adapter nose received in the tooth pocket the lock structure body is axially inserted into the tooth and adapter openings in a first rotational orientation and then forcibly rotated to a second rotational orientation. The surfaces of the tooth and nose openings are configured to radially inwardly displace the radially outwardly biased force exerting member in response to such rotation, in a manner causing the force exerting member and the lock structure body to exert on the adapter nose and tooth point a continuous resilient force tending to tighten the tooth point onto the adapter nose.

Abstract: A wear runner assembly includes a base which is representatively secured to an excavating bucket wall surface, and a wear runner which is releasably connectable to the base by moving the wear runner in a locking direction parallel to the surface to engage tongues on the base with grooves on the wear runner and thereby prevent removal of the wear runner from the base in a removal direction transverse to the surface and the locking direction. By moving the wear runner relative to the base in an unlocking direction opposite to the locking direction the connected wear runner may then be moved in the removal direction to separate the wear runner from the base.