To make the center linkage, cut another piece 1 7/8 inch-
es in length from the Linkages (12). Thread one Linkage
Socket (22) onto one end of the Linkage 3/4 of the way
in. Attach this to one of the center leg ball pins. With
the Roach resting on a flat surface, check how closely the
other end of the linkage lines up with the ball pin on the
second center leg.
Figure 35 shows a linkage that is a bit too long to fit on
the ball pin on the second center leg. By tightening the
socket on the linkage as neccessary, the end result should
line up and snap in just like Figure 36.
Figure 34
Figure 35
Figure 36
Now the Servo Arms (15) must be prepared and attached
to each of the three servos. To start, we need to attach
Ball Pins (23) to each arm. Attach the ball pins to the
servo arms using the Small Washers (25) and Small Nuts
(26) as shown in Figure 37. If you’re planning on hav-
ing the Roach lift large loads, it is recommended that one
of the servo arms to be used on the center servo have the
ball pin mounted on the innermost hole for maximum
torque.
Figure 37