[CEdwards]

I ordered a new front seal from cummins to do my kdp tommorow. I've reasearched it on here but i'm still confused. In the seal box was the seal with plastic guide stuck inside it. Does it go on with the larger tapered end in first? Then put cover in truck and pull plastic out? Will I be able to pull it out? I'm thinking the plastic thing is in backwards it would have to be large end out. I have the ring that must be used for tapping it in and setting the depth. The thing I really don't understand is what is the black rubber plastic ring thing for? where does it go? cummins instructions don't tell me anything. By the way will I need a puller for the dampner pully?