James and Bob,
Thank you for this thread and older thread on the 455. My tractor has been in storage over the loooong winter (I would liked to have used it with all of the snow this winter). It was nice enough the other day I went out and checked the tractor out put the key in, turned it on then waited for the glow plugs to cycle then cranked it over and it started right up. I am thinking of a full service before this year's mowing season. Glad to learn the fuel system is self-priming. I just never let it run out of fuel, I don't even want to risk a fuel pump replacement. Is there a special (high-dollar) wrench to get the fuel filter collar off and on or do you just use a screw driver or a channel-lock wrench?