-Recommended Hydraulic Fluid Specifications-

Oil should have anti-wear characteristics, excellent rust protection and contain additives to protect against foaming.

NOTE: Manufacturer uses hydraulic oil supplied by U.S. Oil Corporation with the following characteristics.
Viscosity Index 101
Grade 32
@ 100 F. it has a viscosity of 156
@210 F. it has a viscosity of 43.7

Cross-referencing to other manufacturers the following oils could be substituted.
Gulf Harmony 32A
Mobile D.T.E. 24
Shell Tellus 32
Texaco Rando H.D. 32