xenogear_id

hey people.. i just bought my 86 pickup 4x4 its awesome.. but i have to pump the brakes.. and im leaking brake fluid from the bottom of the brake reservoir. i look around for a new master cylinder and they do not come with the reservoir. i did find a used one on ebay. but if some can tell me how to take off my old reservoir ill be able to buy a new master cylinder.. can some give me some info on how to remove this part? thanks for any help..

22mr2

napa part # 39500 or napa/altrom p9276. Both of them come with the reservoir already mounted for around 80 bucks