1954 AMI F80 gripper arm frozen up

This is a 1954 AMI F80 and the gripper arm assembly is frozen. Does anyone know where I can find a tutorial or video on removing the gripper arm assembly and taking it apart to clean and oil? I have the motor off. Then I think you remove the 2 screws and the assembly will come out. Is there a pin you have to knock out with a punch and then you can dissemble it? Thanks