SAE J189:2003 pdf download

SAE J189:2003 pdf download Power Steering Return Hose—Low Pressure
9.1.2 H YDRAULIC F LUID AND T EST F IXTURE —As specified by the original equipment manufacturer.
9.1.3 C YCLE L IFE —Samples submitted to this test shall exceed 1 00 000 cycles for inspection acceptance and 225 000 cycles for qualification testing, without failure.
9.2 Tensile Test—When tested in accordance with ASTM D 380, end fittings shall withstand a minimum tensile load as shown in Table 1B without the fittings pulling off or rupture of the hose.
9.3 Low Temperature Flexibility—Samples shall be subjected to a temperature of –40 °C ± 1 °C (–40 °F ± 2 °F) for a period of 24 h, after which the hose shall be flexed in the cold chamber through 180 degrees from the centerline around a mandrel whose diameter is eight times the nominal hose OD. Flexing shall be accomplished within 3 to 5 s. Hose shall not fracture or show any cracks, checks, or breaks in the tube or cover.
9.4 Adhesion Test—When tested in accordance with ASTM D 413, a pull of not less than 35.586 N (8 lb) shall be required to separate a 1 in wide ring section of the bond between any adjacent layers of the hose. 9.5 Bursting Strength—Samples shall meet the minimum bursting strength requirements shown in Table 1 B.
9.6 Ozone Resistance—The outer cover of the hose shall show no cracking when examining the cover of the hose under 7X magnification, ignoring the areas immediately adjacent to or within the area covered by the binding. Bend the hose around a cylinder, the diameter of which shall be seven times the nominal outside diameter of the hose, and bind the ends.
The cylinder and binding shall be made of metal or materials that prevent the consumption of ozone. If the hose collapses when bent around the cylinder, provide for internal support of the hose.
Condition the hose, on the cylinder, for 24.0 h ± 0.5 h at room temperature, and then place it in an exposure chamber containing air mixed with ozone in the proportion of 50 pphm ± 5 ozone in air by volume, for 70 to 72 h. Ambient air temperature in chamber during test shall be 40 °C ± 3 °C (1 04 °F ± 5 °F). Examine the cover of the hose for cracks under 7X magnification, ignoring the areas immediately adjacent to or within the area covered by the binding.