TB 55-9150-200-24
CHAPTER 4
HYDRAULIC FLUIDS
CAUTION
To avoid contamination, do not use previously opened cans of hydraulic fluid. A new sealed
can of fluid must be opened and used.
4-1. General.
Pilots of Army aircraft, while on cross-country flights, may use commercial hydraulic fluids to complete their mission
when oils from Army supply channels are not available.
4-2. MIL-H-5606.
The following commercial oils may be purchased locally under the following manufacturer's designation:
MIL-H-5606
Hydraulic Fluid, Petroleum Base, Aircraft and
Ordnance
Manufacturers
Manufacturers
Designation
Name
"PO" Hydraulic Fluid 4226
American Oil and Supply Co.
Brayco 757B
Bray Oil Co.
Brayco 756C
Brayco 756D
Brayco 756E
Castrol Hyspin A
Castrol Oils Inc.
Univis J41
Humble Oil and Refining Co.
Univis J41
Exxon Co.
Mobil Aero HFB
Mobil Oil Corp.
Petrofluid 5606B
Pennsylvania Refining Co.
Petrofiuid 4607
Royco 756C
Royal Lubricants Co.
Royco 756D
DS-437
PED 3565
Standard Oil Co. Of Calif.
PED 3337
TL-5874
Texaco, Inc.
Stauffer Aero Hyaroil 500
Stauffer Chemical Co.
25606
MZF Associates
FP-221
Union Carbide Corp.
Change 1
4-1
