There are very few 2465As that use this motor, unless you have OPT 01, the DMM option.
You can tell externally if yours has this motor or not by the small vent on the rear cover.
Looking at the back cover of the scope, the inner vent next to the power cord - if is the same height as the left edge vent then you have a muffin fan and you don't need this motor.
If the vent near the power cord is about 2 inches high your scope use this fan.
Note, if your scope is working, keeping cool and not making a squealing noise you will not need this fan either.