I need to replace the pump motor of a Beckett oil burner. All the research I've done shows a very simple, tubular coupling between the motor and the pump shaft. So when I took my motor off I discovered a rather elaborate coupling with a kind of conical flap attached to it (pics attached). I noticed there is sticker on the outside of the unit showing a depiction of this coupling and stating "Inlet Air Shut-off Installed 6526". I cannot find this coupling type anywhere on the internet and it appears it was a feature Beckett got away from. \n\nAnyone hear of this type of coupling? Amazon sells the [SIZE=4][B]Beckett 2454 COUPLING FOR A, AF, AFG & NX BURNERS REPLACES 5861( AIR SHUT-OFF OBS.) [/B]I guess[B] [/B]implying the air shut-off is obsolete. \n[/SIZE]\nCan I just use a standard replacement coupling (p/n 2454) and not use this air shut off thing at all?\n\nAppreciate your help in advance!