Its obvious your talking bout #### you know nothin about yet again. The 3406B is famous for its whine......936 loader I'm betting it had a little 3304 in it bout 140 hp if I remember right.
They were good bus engines. Pulling a load in the wind or up a hill they're one of the most hateful engines I ever drove, but lots of fun when bobtailing.
Get rid of the “hybrid” electronic bs and replace it with a mechanical “B” or “C” pump.......it’s one of the greatest engines ever made!