TM 10-3930-669-20 c. Installation. Install  seal  (2)  and  nut  (1)  on  locking  nut  (4)  and screw (3). NOTE Follow-on Maintenance: • Close cab door (TM 10-3930-669-10). • Close left-hand rear access cover (TM 10-3930-669-10). • Remove wheel chocks (TM 10-3930-669-10). END OF TASK 4-21