Huf dissolution

Hello I and my father stay in hyderabad My grandfather and uncle stay in a small village near nanded, maharastra Our forefathers had an agricultural land of around 24-25 acres my grandfather sold 2acres of land before partition from the huf when his children where minors with court's permission and then his brother got 12acres of land which he had sold. Remaining land is with my grandfather, he is not willing to give my share and my father's share in huf. I jus wanted to know if i can file a suit against him and get my share in huf and is it necessary to register the land by we both brothers after the court order's for partition. We even have 4 sisters. One of the sister's threatens me that my father is torturing my grandfather and she will file a suit against my father, if he approaches the court for the land. My father is a govt employee and he has been taking care of my grandparent's medical expenses thru the scheme given by the govt. I wanted to know if we can use these document as proof that my father is taking care of them and will he and his brother get the share in huf equally (or) his sisters will also have share in this huf.