para. 4-48 TM 9-2320-361-20 4-32. STOPLIGHT AIR PRESSURE SWITCH REPLACEMENT (M275A2) This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS M275A2 MATERIALS/PARTS Antiseize tape (Appendix C, Item 27) REFERENCES (TM) TM 9-2320-361-10 TM 9-2320-361-20P EQUIPMENT CONDITION Parking brake set (TM 9-2320-361-10). Air reservoirs drained (TM 9-2320-361-10). Battery ground cable disconnected (para. 4-48). GENERAL SAFETY INSTRUCTIONS Do not disconnect air lines before draining air reservoirs. a. Removal WARNING Do not disconnect air lines before draining air reservoirs. Small parts under pressure may shoot out with high velocity causing injury to personnel. NOTE Tag wires for installation. 1. Disconnect wire plugs (4) and (5) from stoplight switch (3). 2. Remove stoplight switch (3) from adapter (2). 3. Remove adapter (2) from air valve (1). b. Installation NOTE Clean all male pipe threads and wrap with antiseize tape before 1. 2. 3. Start engine (TM 9-2320-361-10) and allow air pressure to build up to normal operating range. Check stoplights for proper operation. 4-50