If the line fitting is to tight you will need a crow's foot or a flare nut wrench to remove it to mitigate the changes of rounding off the line nut.
You whould probably do both hoses while your there.
A good autoparts store should have the pressure line, hose for the return, and probably the flare-nut wrench.
1997 XJ - Parts Donor - Good Running 4.0, HP30
1997 ZJ - Parts Recipient - Trashed 4.0
1988 Dodge Ram - D60's, 4.56, ARB's, 408 cu.in, 46RH, NW-Fab Black-Box\205, BFG AT 35"s