Retainer systems

A wear part and retainer system in combination, for earthmoving and mining equipment, the wear part (40) having a first passage (50) extending therethrough in one direction and a second passage (54) extending in a direction lateral to and intersecting the first passage, the first and second passages each having an outer end and an inner end, a latching member (72) mounted in said first passage (50) for movement between a non-latching position and a latching position in which it locks the wear part to a mother part (12), said latching member (72) having a recess therein (73) and biasing means (76) mounted in said recess, a locking pin (60) mounted in said second passage (54) for selective movement along said passage between a retracted position in which the latching member is free to move into and out of said recess and an extended position in which it locks said latch in the latching position.