Scheme 680 Log in Scheme 680: COMPONENT Tightening torque: N.m (kgf-m, ft-lb) T1: 1 (0.1, 0.7) T2: 3 (0.3, 2.2) T3: 6 (0.6, 4.4) T4: 7.5 (0.8, 5.5)