[Walt Dupont--Me.]

A lot of cams do not have the flat spot to hole the gear ( I don't know why they didn't flat spots on all cams) There's no doubt yours don't have the flat, and with the pump bound up with the washer it has spun the gear on the cam. To pull the idle gear use a slide hammer and with a 3/8 course thread stud and thump the shaft out. The bad thing is it's probably worn the end of the cam so a new gear won't press on tight. If by any chance a new gear fit's tight (witch I dougt) have a friend use a pry bar against one of the cam lobes and with some lock tight on the end of the cam and gear drive the new gear on. Good luck. Walt