12-87. TM9-2320-361-20 d. Vertical Drivechain Cover Removal 1. Remove nut (1) and lockwasher (13) from stud (11). Discard lockwasher (13). 2. Remove screw (2), lockwasher (3), washer (4), bushing (5), and cover (12) from gear (6). Discard lockwasher (3). 1. Check freeplay by pushing up at midpoint of drivechain. Acceptable freeplay is 0.5 in. (1.27 cm). NOTE If freeplay is acceptable, proceed to subtask f. If freeplay is unacceptable, perform steps 2 through 4. 2. To adjust freeplay, loosen nut (7) and screw (10). 3. Hold shaft (9) and turn eccentric bushing (8) until freeplay is 0.5 in. (1.27 cm). 4. Tighten nut (7) and screw (10). 1. Install cover (12) on gear (6) with bushing (5), washer (4), new lockwasher (3), and screw (2). 2. Install new lockwasher (13) and nut (1) on stud (11). 12-142