TM 9-2320-386-10 Change 1 2-51 2-12. STARTING THE ENGINE (ABOVE +20°F) (-6.7°C) (Contd) .WARNING. • Do not place vehicle in motion until warning buzzer stops and air pressure gauge reads at least 90 psi (621 kPa). Failure to do this may result in brake failure, causing injury or death to personnel. • If buzzer stops and air pressure reading is below 65 psi (448 kPa), there may be no braking action. Shut down engine and check to see what is wrong. Failure to do so may result in injury or death to personnel. • If NBC exposure is suspected, all air filter media should be handled by personnel wearing protective equipment. Consult your unit NBC officer or NBC NCO for appropriate handling or disposal instructions. • NBC contaminated filters must be handled using adequate precautions (FM 21-40) and must be disposed of by trained personnel. (4) Ensure air pressure gauge (6) reads 90-120 psi (621-827 kPa). (5) Ensure air cleaner indicator (7) does not show yellow. (6) Ensure engine is operated at low loads until engine reaches normal operation temperature 160°F- 230°F (71°C-110°C). k. Stop engine immediately and notify unit maintenance if any of the following occurs: (1) Engine is vibrating or making excessive noise. (2) Oil pressure does not register or suddenly drops below 35 psi (241 kPa). (3) Engine temperature rises sharply to 230°F (110°C) or more, or suddenly falls below 160°F (71°C). (4) Engine temperature rises suddenly. 5 6 7