GFA Shaft Lid generations
The closed end GFA module's shaft lid comes in two generations (1 and 2). Assembly of the GFA module with a shaft lid of generation 1 or 2 are the same, until the shaft lid is assembled on the module, then the assembly varies between generation 1 and 2.
To identify the shaft lid generation
The shaft lid generation 1 does not have splines and the shaft lid is tightened with a pin spanner. The shaft lid generation 2 has splines and the shaft lid is assembled on the module by tightening two screws securing the shaft lid plate.
