be very careful with the three little torks screws, they are a soft metal and it is very easy to strip the head out, i had a modded pump once that had a stripped torks screw and what a pain in the a--, ended up taking it out with a tiny pair of vice grips...Thanks everyone. I picked one up today at Cummins. Can someone tell me what it takes to remove and replace? Anything to watch out for?