TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
Page 281 of 532
TM 9·2815-220·3'1 lnstall adapter and pla.te and secure with two plain nuts and lockwnshers removed above. Install splined end of generator coupling tool (8, fig. 2-5) on plate and secure with clamp ( 1, fig. 3-163.1) removed above. Using a 300 pound-feet capacity torque wrench (2), gradually increase the torque to 167 pound-feet. If slippage occurs below 167 pound-feet, the gearshaft is defective and must be replaced. Check torque rotational deflection rate. Using same coupling and torque wrench, apply 167 pound-feet torque. Note deflection in degrees from zero torque to I 67 pound-feel torque. If rotation is less than 8°, or greater than 17°, the gearshaft is defective and must be replaced. Inspect gearshafl and bearings against limits specified in the repair standards (table 34). Replace parts not meeting these requirements. l "V" bd clamp 2 Torque wrench TA 1261631 J./6J.J. eckln1 gtnttor drlt t /or s/lgt and rototfonal dt/ltetlon. Table J.4. Geuerotor Drive Repair Sta11da, Mel AVDS-17Z·2C Fig. Ref. Point of Sizes and fits Wear Component No. letter measurement of new parts limits - Generator dve 3·167 m Outside diameter of bearings on generator 2.S41 2.S46 . gearshaſt, oil seal drive geahafl and beangs 3·167 k Inside diameter of bearing bore in 2.8346 2.8353 2.8356 adapter 3·167 m·k Fit of bearing In adapter 00 0.0012L 0.0015L 3-167 p Inside diameter of beang bore in 2.S46 2.S53 2.S56 crankcase liner 3·167 m·p Pit of bearing in crankcase 0.0000 0.0012L 0.00l5L 3-167 n Outside diameter of be+1ing hubs 1.3781 1.3785 1.3779 on gearshaſt 3·167 ee Inside diameter of bearings 1.3776 1.3780 . 3-167 ee·n Fit of beangs on gearshaſt O.ꝃOlT O.ꝃlOT O.OOOlL Refer to paragraph 3·37c for explanation of symbols. Change2 3-78.1 (3-78.2 blank) ·�