TM 9-2320-209-20-3-4 FRAME 3 1. Using 15/16-inch wrenches, tighten two locknuts (1). 2. Using 3/4-inch wrench, breaker bar, extension, and 3/4-inch socket, tighten two screws (2) and nuts (3) on each cross chain bracket (4). NOTE Follow-on Maintenance Action Required: Replace second reduction drive chain. Refer to para 19-17. END OF TASK 19-85