Did you know how important having the correct Model A fan belt is and having the correct belt length is so important. If the replacement or spare belt is too short, you will not be able to pry them onto the pulleys with a pinch bar, and if it is too long that when you adjust them, the belt will rub a hole in your lower radiator hose.

Click on the link to read the complete article 1pdf Fan belt adjustment РJune 2012