Bantam/Koehring T-450 Crane hyd. information needed.

As the title states I need info. for the hyd. oil specs on a T-450 juicer, S/N. 632. My O.O.M. states I need a Gulf 54aw or an equivalent hyd. oil in a 10w. However I can't seem to find a 54aw locally, I've found 63aw and 46aw but not a 54aw. Some will say, 10w is 10w and I kind of agree but manual states that the winches won't work properly if the wrong type of oil is used. Oils meeting the A.P.I. classification of ML, MM, MS, DS, DM and DG are NOT recommended as they have detergent additives. Thanks in advance for any insight.