Note the pressure at the exact moment when slipping is obtained for a torque of 10 mAN (7.2 ft Ibs) (e.g.: Pl = 28 bars -410 psi) The difference between this pressure and that noted in §18 should be no more than 11 bars (160 psi) (in the example taken : P - Pl = 38 - 28 = 10 bars) (150 PSI). 20. Unscrew completely the bleed screw D on the test-bench. 21, Withdraw the torque wrench and instrument MR. 630-55/6 from the starting handle hole.