TM 9-2320-361-20 13-12. CARRIAGE CROSS CHAIN MAINTENANCE (M764) This task covers a. Removal c. Installation b. Inspection d. Adjustment INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) M764 TM 9-2320-361-10 MATERIALS/PARTS TM 9-2320-361-20P Four lockwashers EQUIPMENT CONDITION Three clips Parking brake set (TM 9-2320-361-10). Second reduction drivechain removed (para. 13-15). 1. Remove four screws (5), lockwashers (4), washers (3), and cross chain cover (2) from two cross brackets (l). Discard lockwashers (3). 2. Turn carriage drive sprocket (11) until connecting link (16) is accessible. 3. Remove clip (12), keeper (13), two spacers (14), connecting link (16), and cross chain (15) from sprockets (19) and (20). Discard clips (12). NOTE Perform step 4 if tensioner is damaged. 4. Remove two clips (6), pins (7), chain guide (8), setscrew (9), and chain guide pin (10) from cross chain (15). Discard clips (6). Check cross chain (15), chain guide (8), and sprockets (19) and (20) for cracks, bends, or breaks. If damaged, replace. 1. Install chain guide pin (10) and setscrew (9) on chain guide (8). Install chain guide (8), two pins (7), and new clips (6) on cross chain (15). 2. Install cross chain (15) on two sprockets (19) and (20) with connecting link (16), two spacers (14), keeper (13), and new clip (12). 3. Install cross chain cover (2) to two cross chain brackets (1) with four washers (3), new lock- washers (4), and screws (5). NOTE Perform step 1 if cross chain cover has not been removed. 1. Remove four screws (5), lockwashers (4), washers (3), and cross chain cover (2) from two cross chain brackets (l). Discard lockwashers (4). 2. Measure distance (18) from center of sprocket (19) and inner edge of drum flange (17). Repeat for opposite side. Measurement must be equal. 13-20