OIL PUMP GROUP 7N4170 - Caterpillar

Illustration 1 g01848710
O-ring face seal fitting (ORFS fitting)
(1) O-ring face seal connector
(1A) O-ring groove
(2) O-ring seal
(3) Nut for the O-ring face seal
Table 1
Ferrous ORFS Fitting
Thread Size
Inch Torque
9/16 - 18 27 4 N m (239 35 lb in)
11/16 - 16 45 5 N m (33 4 lb ft)
13/16 - 16 65 10 N m (48 7 lb ft)
1 - 14 110 17 N m (81 13 lb ft)
1 13/16 - 12 140 21 N m (103 15 lb ft)
1 7/16 - 12 220 33 N m (162 24 lb ft)
1 11/16 - 12 300 45 N m (221 33 lb ft)
2 - 12 350 53 N m (258 39 lb ft) Note: Use 50 percent of the torque values from Table 1 when the fitting or the port material is nonferrous.