I don’t see how this will help. Why would the connections fail?What type of coupling arrangement is there on the loader control valve? If it's a singular type with a 1/2" bsp male connected to a 1/2"bsp female quick (x4) release coupling then lower the loader to ground ,shut off tractor and move joystick in all 4 directions and then disconnect all 4 couplings and have a good look at the nipple in each type, if the head of the nipple is battered looking then replace both male and female ends .They will be in line as in 1,2,3,4. This should solve it. The 1/2"bsp male and 1/2"bsp female couplings can be got at any agri dealer, hyd stockist.
Make sure that you buy all the male/ female couplings from the same brand.