I have an International 238, which is the industrial version of the 384. Mine has an 1850 loader, similar to the 2250 loader but not easily removed, but I don't think that would change how you check the fluid. The manual says the hydraulic fluid should be checked by removing the filler plug located behind the seat and "Fill the housing with the correct oil (Hy-Tran) as specified in the lubrication table, until the level reaches the bottom of the filler plug threads." In the capacity section it lists 11.4 litre (24 US pints) as the correct capacity, but warns "These capacities are a guide to the quantities required. Always use dipsticks or level plugs to ensure that units are filled to the correct level." I am not aware of a level plug or dipstick for the hydraulic fluid, but when my unit used to leak I used the bottom of the filler plug thread as a guide and never had a problem.