TM 9-2320-209-20-3-2 b . Adjustment (Air Pressure More Than 105 psi). Soldier A Soldier B Soldier A Soldier B Soldier A 1. 2. 3. 4. 5. 6. 7. 8. 9. END OF TASK Open hood. Refer to TM 9-2320-209-10. Unscrew and take cap (1) off air valve (2). Watching air pressure gage (3), turn valve to left and bleed air pressure down below 100 psi. Turn valve to right. Tell soldier A when ready. Using 1 1/16-inch wrench, loosen jamnut (4). Using 13/16-inch wrench, turn adjusting nut (5) 1/4 turn to left to lower air pressure. Tell soldier B when ready. Start engine and run until air pressure gage (3) stops going up and read gage. Refer to TM 9-2320-209-10. If gage reads more than 105 psi, stop engine and do step 4 again. If air pressure gage (3) reads between 100 and 105 psi, stop engine. Refer to TM 9-2320-209-10. Screw cap (1) on air valve (2). Using 1 1/16-inch wrench, tighten jamnut (4). Make sure that nut (5) does not turn. Close hood. Refer to TM 9-2320-209-10. 13-265