TM10-3930-660-20 16-7. CAB DOORS   - SERVICE/REPLACE (Cont’d) INSTALLATION 1. INSTALL LOWER DOOR  (10). a. b. c* d. Position lower door (10) on lower door hinges (21) and install capscrews (22). Install two nuts (20). Secure holding strap (19) with two capscrews (17) and two flatwashers (18). If necessary, install weatherstripping (23). 2. INSTALL UPPER DOOR (9). a. b. c. d. Position upper door (9) on upper door hinges (12) and install capscrews  (13). Install two nuts (11). Latch upper door (9) and lower door (10) together. If necessary, install door holder (15) with screw (14) and nut 16. 16-10