TM 10-3930-669-20 (3) Remove  two  nuts  (3),  washers  (4),  screws  (5) and door stop (6). b.  Installation. (1) Install door stop (6) on cab (7) with two screws (5), washers (4), and nuts (3). (2) With  the  aid  of  an  assistant,  install  door  (1)  on door hinges (2). WARNING Cab  door  weighs  85  lbs  (39  kg).    Use the aid of an assistant for installation to prevent possible injury to personnel. NOTE Cab  door  must  be  fully  opened  prior  to installation  on  door  hinges  in  order  to clear the cab lifting point. (3) Close door (1). NOTE Follow-on Maintenance: · Remove   wheel   chocks   (TM   10-3930-669- 10). END OF TASK 15-23

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