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6 Maintenance <br />.6.2 Torque values <br />All screws and nuts must be lubricated to achieve correct tightening torque. Screws that <br />are screwed into stainless steel must have the threads coated with suitable lubricants to <br />prevent seizing. <br />If there is a question regarding the tightening torques, then contact a sales or authorized <br />service representative. <br />Screws and nuts <br />Table 1: Stainless steel, A2 and A4, torque Nm (ft-Ibs) <br />Property <br />class <br />M4 <br />M5 <br />M6 <br />M8 <br />M10 <br />M12 <br />M16 <br />M20 <br />M24 <br />M30 <br />50 <br />1.0 (0.74) <br />2.0 (1.5) <br />3.0 (2.2) <br />8.0 (5.9) <br />15 (11) <br />27 (20) <br />65 (48) <br />127 (93.7) <br />220 (162) <br />434 (320) <br />70,80 <br />2.7(2) <br />5.4(4) <br />9.0 (6.6) <br />22 (16) <br />44 (32) <br />76 (56) <br />187 (138) <br />364 (268) <br />629 (464) <br />1240 (915) <br />100 <br />4.1(3) <br />8.1(6) <br />14 (10) <br />34 (25) <br />66 (49) <br />115 (84.8) <br />248 (183) <br />481 (355) <br />- <br />- <br />Table 2: Steel, torque Nm (ft-Ibs) <br />Property <br />M4 <br />M5 <br />M6 <br />M8 <br />M10 <br />M12 <br />M16 <br />M20 <br />M24 <br />M30 <br />class <br />8.8 <br />2.9 (2.1) <br />5.7 (4.2) <br />9.8 (7.2) <br />24 (18) <br />47 (35) <br />81(60) <br />194 (143) <br />385 (285) <br />665 (490) <br />1310 <br />(966.2) <br />10.9 <br />4.0 (2.9) <br />8.1(6) <br />14 (10) <br />33 (24) <br />65 (48) <br />114 (84) <br />277 (204) <br />541(399) <br />935 (689) <br />1840 <br />(1357) <br />12.9 <br />4.9 (3.6) <br />9.7 (7.2) <br />17 (13) <br />40 (30) <br />79 (58) <br />136 (100) <br />333 (245) <br />649 (480) <br />1120 <br />2210 <br />(825.1) <br />(1630) <br />Table 3: Brass, torque Nm (ft-Ibs) <br />M5 IM8 <br />2.7 (2.0) 11 (8.1) <br />Hexagon screws with countersunk heads <br />For hexagon socket head screws with countersunk head, maximum torque for all property <br />classes must be 80% of the values for property class 8.8 above. <br />6.3 Change the oil <br />This image shows the plugs that are used to change the oil. <br />1 <br />1. Oil plug <br />0 <br />Flygt 3102 Installation, Operation, and Maintenance Manual 43 <br />