3) 3) TIGHTENING TORQUE AND HYDRAULIC CONNECTIONS TIGHTENING TORQUE AND HYDRAULIC CONNECTIONS (1) (1) Hydraulic connections Hydraulic connections L : Left port R : Right port T : Tank P : Pump T L P R (780-3A) 5-71 Tightening torque Tightening torque (2) (2) 5-31 Screwed connection Max.
tightening torque [ kgfÂm (lbfÂft) ] With cutting edge With copper washer With aluminum washer With O - ring 1/4 BSP.F 4.1 (29.7) 2.0 (14.5) 3.1 (22.4) - 3/8 BSP.F 6.1 (44.1) 2.0 (14.5) 5.1 (36.9) - 1/2 BSP.F 10.2 (73.8) 3.1 (22.4) 8.2 (59.3) - 7/16-20 UNF - 2.0 (14.5) - - 3/4-16 UNF - 6.1 (44.1) - - M 12Ý1.5 4.1 (29.7) 2.0 (14.5) 3.1 (22.4) 2.0 (14.5) M 18Ý1.5 7.1 (51.4) 2.0 (14.5) 5.1 (36.9) 5.1 (36.9) M 22Ý1.5 10.2 (73.8) 3.1 (22.4) 8.2 (59.3) 7.1 (51.4)