A dipper (38) including a dipper door (86) and an impact actuated jaw (104) having a "C" shape defining a lip (108) and a chin (112). The jaw (108) is rotatably mounted on the dipper door (86) for rotation between a door-opened position and a door-closed position and positioned so that when the jaw (104) is in the door-opened position, the jaw chin (112) can be impacted by the dipper body (62) when the door (86) pivots to the door-closed position. The dipper (38) also includes a hold open mechanism for releasably holding the door latch in the latch open position when the latch is in the open position, and a locking mechanism for releasably locking the latch when the latch is in the door-closed position. The locking mechanism includes one bar (164) pivotally attached to the door (86), and another bar pivotally connected to and extending between each of the one bar (86) and the latch.
