214367 106 Revision A5.1.7 O-Ring Face Seal (ORFS) Hydraulic Fittings1001376Figure 5.14: Hydraulic Fitting1. Check components to ensure that sealing surfaces andfitting threads are free of burrs, nicks, scratches, or anyforeign material.1001377ABCDEFigure 5.15: Hydraulic Fitting2. Apply hydraulic system oil to O-ring (B).3. Align tube or hose assembly so that flat face ofsleeve (A) or (C) comes in full contact with O-ring (B).4. Thread tube or hose nut (D) until hand-tight. The nutshould turn freely until it is bottomed out.5. Torque fittings according to values in Table 5.13, page106.NOTE:If applicable, hold hex on fitting body (E) to preventrotation of fitting body and hose when tightening fittingnut (D).6. Use three wrenches when assembling unions or joiningtwo hoses together.7. Check final condition of fitting.Table 5.13 O-Ring Face Seal (ORFS) Hydraulic FittingsSAE Dash Size Thread Size (in.) Tube O.D. (in.) Torque Value7Nm lbf·ft-3 Note 8 3/16 – –-4 9/16 1/4 25–28 18–21-5 Note 8 5/16 – –-6 11/16 3/8 40–44 29–32-8 13/16 1/2 55–61 41–45-10 1 5/8 80–88 59–65-12 1-3/16 3/4 115–127 85–94REFERENCE7. Torque values and angles shown are based on lubricated connection as in reassembly.8. O-ring face seal type end not defined for this tube size.
