Shape
Circle and
Select
Surfaces commands still active, draw a circle enclosing the hole at the free end of the crank as shown in the following image. 
CAD Additions
Joint and click the OK button to add the pin joint, which then appears as shown in the following image. 
Navigate
Enclose (Fit All) (or the equivalent Navigation Bar command). The model displays as shown in the following image. 
This tutorial is now complete. Use the meshed model to complete the Piston Mechanical Event Simulation tutorial.