Does anyone know about heavy equipment? I have three small ponds and have always wanted to have something over an acre. My dad finaly got senile enough to buy a 50 something D6 Cat. I'm about half way through with enlarging one of my ponds to about two acres and have a broken seal (that's what I'm told). Grease is leaking out in front of the big spring and causing the track to loosen. I've taken the bolts out in front of the spring and behind the spring but it doesn't come out. Is it compressed? Do I have to take off the grease resevoir by taking everything off up to the wheel? These are some rusty bolts. Am I making sense. I want ot finish before the spring rains and this is driving me crazy.