TM 9-2320-361-20 13-12. CARRIAGE CROSS CHAIN MAINTENANCE (M764) (Contd) 3. 4. 5. 6. 7. 8. NOTE If distances are not equal, perform step 3. Loosen four cross chain bracket screws (2), nuts (1), two jamnuts (4), and adjusting screws (3). Adjust two adjusting screws (3). Tighten two jamnuts (4). Ensure adjusting screws (3) do not turn. Tighten four cross chain bracket screws (2) and nuts (1). Measure for 0.5 in. (1.3 cm) freeplay at cross chain midpoint (10). If freeplay is incorrect, adjust cross chain (11). Loosen two jamnuts (4) and measure 0.5 in. (1.3 cm) freeplay at cross chain midpoint (10). Adjust screws (3) until 0.5 in. (1.3 cm) free play is obtained. Tighten two jamnuts (4). Ensure adjusting screws (3) do not turn. Install cross chain cover (6) to two cross chain brackets (5) with four washers (7), new lock- washers (8), and screws (9). FOLLOW-ON TASK: Install second reduction drivechain (para. 13-15). 13-22