ARHS STORING OF DRILL ROD OPERATION
Make sure tophead is in on-hole position with drill rod disconnected from drill string.
Set and hold PIPE POSITIONING ARM ELEVATION switch (Figure 10, Item 4) in RAISE position to move
automated drill rod handling arm (Figure 10, Item 2) to upright position.
Figure 10. Elevation Switch Operation.
Set and hold PIPE POSITIONING ARM ROTATE switch (Figure 10, Item 3) to down position to move
clamps (Figure 10, Item 1) inward.