TM   9-2320-273-20 5-29.   SENDING   UNITS,   SWITCHING   DEVICES   AND   WINTERIZATION   KIT MAINTENANCE   TASK   SUMMARY   (Continued). LIST   OF   TASKS TASK TASK TROUBLESHOOTING NO. TASK REF REF  (TABLE) 10 Fuel  Level  Sending  Unit  Maintenance: 5-79 5-7 A. Removal. 5-79A B. Installation. 5-79B C.   Operational   Check. 5-79C 11 Low Air Pressure Buzzer Maintenance: 5-80 5-6 A. Removal. 5-80A B. InstalIation. 5-80B C.   Operational   Check. 5-80C 12 Low  Air  Pressure  Switch  Maintenance: 5-81 5-6 A. Removal. 5-81A B. InstalIation. 5-81B C. Operational  Check. 5-81C 13 Park  Brake  Switch  Maintenance: 5-82 5-7 A. Removal. 5-82A B. Installation. 5-82B C.   Operational   Check. 5-82C 14 Differential   Lock-Up   Switch   Maintenance: 5-83 5-7 A. Removal. 5-83A B. Installation. 5-83B C.   Operational   Check. 5-83C 15 Power  Takeoff  (PTO)  Switch  Maintenance: 5-84 12-2 A. Removal. 5-84A B. Installation. 5-84B C. Operational  Check. 5-84C 16 Stop  Lamp  Switch  Maintenance: 5-85 5-11 A.   Removal. 5-85A B. Installation. 5-85B C.   Operational   Check. 5-85C 5-82