switch box question

[ugadawg187]

My motor had 332-7778A12 power packs on it and i purchased two 332-7778A13 to replace them. I was told they would work so my question is what is the diff between the two part numbers if any?

 

[AMD Rules]

Re: switch box question

I believe the last digits are a revision level only. In this case it could be something internal to the switchbox design that nobody but the Merc fellas will ever know. Hopefully a design enhancement of some kind, that will reduce the risk of 'letting the smoke out of the box' as they say.