I finally got my first steroid epidural today, to treat my ruptured L4-L5 disc in my lower back.The rack has been leaking for a year and a half or so, but I've put off changing it until my back is fixed. I bought a rebuilt rack, new pump and hoses. I ended up using a gallon of synthetic transmission fluid to keep the old unit topped off, and low and behold the rack has almost stopped leaking. It was leaking something awful last month, had to fill it up every day. This week it hasn't required filling, looks like I've got time to heal before I do. Many thanks to the gentleman who suggested synthetic (Spook?).