TM 9-2320-361-20 12-112. FIFTH WHEEL REPLACEMENT (Contd) 1. Attach utility chain (4) to fifth wheel (1) with four washers (2), two screws (6), and nuts (3). NOTE Assistant will help with step 2. 2. Install two spacers (8) and fifth wheel subbase (5) on frame rails (7) with twenty washers (10), ten screws (11), and new locknuts (9). Tighten locknuts (9) 125-150 lb-ft (170-203 NŽm). 3. Remove two nuts (3), four washers (2), two screws (6), and chain (4) from fifth wheel (1). FOLLOW-ON TASK: Lubricate fifth wheel (LO 9-2320-209-12-1). 12-182