TM10-3930-660-20 16-11. CAB SKYLIGHT GUARD AND WINDOW - REPLACE (Cont’d) 3. CAREFULLY REMOVE SKYLIGHT WINDOW (2) AND TAPE SEAL (8) FROM CAB (3). 4. IF NECESSARY, REMOVE SKYLIGHT WINDOW GUARD (1) FROM CAB (3). a. b. c. INSTALLATION NOTE To prevent guard (1) from falling during removal, place guard (1) over skylight window opening. Remove three capscrews (9), six flatwashers (10), and three nuts (11) securing guard (1) to cab (3). Remove guard (1) from cab (3). Perform steps 2 through 4 for skylight window installation. Perform step 1 for skylight window guard installation. 1. IF REMOVED, INSTALL SKYLIGHT WINDOW GUARD (1) TO CAB (3). a. Place guard (1) over skylight window opening. b. Secure guard (1) to cab (3) with three nuts (11), six flatwashers (10),  and  three  capscrews  (9). 2. CLEAN AND PREPARE SURFACE OF CAB (3) AND SKYLIGHT WINDOW (2). a. If necessary, remove pieces of old tape seal (8) from surface of cab (3) around skylight window opening. Be sure surface is clean and dry. b. Apply metal primer with brush to surface around skylight window opening of cab.   Allow ten minutes for primer to dry. c. Thoroughly clean skylight window (2) with ammonia water. d. Apply ribbon sealer to skylight window (2) even with the outside edge  of  glass. 16-19