Before Christmas 2021, the primer failed on the fuel header assembly on our 2010 DT466. Part was ordered but did not show up, asking the dealer where it was they could not get a response from the supplier. In July 22 the dealer calls and says the part is in, but it was nothing but a empty housing, no caps, filters, heaters, or primer. They sent it back and got a sorry, incomplete assembly! Called them today and the dealer said they called and were told there were 240 critical orders for that part and no idea of a ship date. All that's wrong is the tiny brass one way valve in the primer assembly and you cannot get just that piece. A maybe 10 dollar part that will cost 800 plus to replace the unit. Anyone have a idea or a replacement part number??? Not the dealers fault, but real frustrated!