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HYDRAULIC CONNECTION SPECIFICATIONS O–ring Flare Fitting The flare is the primary seal, the O–ring is the secondary If necessary, the O–ring–flare fitting can be used without Use the following procedure to tighten the O–ring flare Tighten the nut until it contacts with the seat. Make a mark Use the chart below to find the correct tightness needed * If a torque wrench is used to tighten a new fitting to a used hose/tubeline. * If a torque wrench is used to tighten a used fitting to a new hose/tubeline. * If a torque wrench is used to tighten a new fitting to a new hose/tubeline. Revised May 98 Tubeline TORQUE NEW RE–ASSEMBLY Outside Ft.–lbs. Rotate No. Rotate No. Wrench Size Diameter Thread Size (Nm) of Hex Flats of Hex Flats 5/8’’ 5/16’’ 1/2’’ – 20 17 (23) 2–1/2 1 11/16’’ 3/8’’ 9/16’’ – 18 22 (30) 2 1 7/8’’ 1/2’’ 3/4’’ – 16 40 (54) 2 1 1’’ 5/8’’ 7/8’’ – 14 60 (81) 1–1/2 1 1–1/4’’ 3/4’’ 1–1/16’’ – 12 84 (114) 1 3/4 1–3/8’’ 1’’ 1–5/16’’ – 12 118 (160) 3/4 3/4 O–ring Flare Fitting Tightening Torque ** *** * ** If using the hex flat tightening method to tighten a new ** If using the hex flat tightening method to tighten a new *** If using the hex flat tightening method to tighten a used B TS–01619 1 2 Hex Flat Tightening Method 773 BICS Loader –9–11– Service Manual A P–13009 O–ring Flare Primary Secondary |