TM 9-2320-209-20-3-3 c. Inspection and Repair. Check all parts for damage. Throw away damaged parts. Get new parts in their place. d. Assembly. FRAME 1 1. Put washer (1) on vent valve (2). 2. Put cover (3), gasket (4), and retainer (5) on vent valve (2). Screw vent valve into arm (6). Using spanner wrench, tighten vent valve. NOTE Follow-on Maintenance Action Required: Replace manhole cover. Refer to para 18-51. END OF TASK 18-262