Hi guys, I'm in the process of resealing the hydro gear pumps on my Cub Cadet M48 mower. I purschased the mower used and the pumps were leaking pretty badly based on the amount of oily crude around each pump. I currently have each pump taken apart waiting for the seals to arrive tomorrow. When I pulled the hyd. tank off I noticed a small amount of "glitter" in the bottom of the tank, but there is no visible damage done to the pumps. Where could the metal have come from? The hydro system worked well before I removed it to put in the new seals. Next question is what is the best way to purge out the old oil in the wheel motors? I read somewhere that one line can be fed fresh oil and the other will pour out the old. Any help is greatly appreciated. Thanks guys.