Part of an Excavator Arm

FIG. 1 is a perspective view of part of an excavator arm; FIG. 2 is a front view of the part of an excavator arm illustrated in FIG. 1 ; FIG. 3 is a bottom view of the part of an excavator arm illustrated in FIG. 1 ; FIG. 4 is a right side view of the part of an excavator arm illustrated in FIG. 1 ; FIG. 5 is a top side view of the part of an excavator arm illustrated in FIG. 1 ; FIG. 6 is a left side view of the part of an excavator arm illustrated in FIG. 1 ; and, FIG. 7 is a back view of the part of an excavator arm illustrated in FIG. 1 . The broken lines shown in the drawings illustrate portions of a part of an excavator arm that form no part of the claimed design.