Direct Support Mechanical Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 48. WINCH LEAKS OIL Step 1. Check for defective oil seals and gaskets. Replace oil seals and gaskets if defective (TM 9-2320-361-34). Step 2. Check for cracked covers and housings. Replace covers and housings if cracked (TM 9-2320-361-34). END OF TESTING! WINTERIZATION KITS NOTE Mechanical troubleshooting for personnel and engine coolant heaters is the same. The following is for fuel burning personnel heaters. 49. HEATER FAILS TO TURN ON Bench test for defective control parts (TM 9-2320-361-34). If defective, replace control parts as necessary (TM 9-2320-361-34). END OF TESTING! 50. HEATER OVERHEATS – OVERHEAT SWITCH IS GOOD Step 1. Check for obstructed air flow. If air flow is obstructed, clear obstructions from fuel supply and ventilating air passages (TM 9-2320-361-34). Step 2. Check fuel control valve (TM 9-2320-361-34). Replace fuel control valve if defective (TM 9-2320-361-34). END OF TESTING! 51. HEATER OVERHEATS – CONTINUES TO RUN Test overheat switch (TM 9-2320-361-34). Replace overheat switch if defective (TM 9-2320-361-34). END OF TESTING! 52. HEATER OUTPUT TOO LOW Step 1. Check for obstructed fuel lines or contaminated fuel supply. If obstructed, clear fuel supply lines (TM 9-2320-361-34 for internal fuel supply; TM 9-2320-361-20 for external fuel supply). Step 2. Drain and check fuel control valve (TM 9-2320-361-34). Replace fuel control valve if defective (TM 9-2320-361-34). END OF TESTING! 53. HEATER SMOKES AND BANGS WHEN STARTING Perform malfunction 52. END OF TESTING! 54. BLOWER WILL NOT STOP AFTER TURNOFF Check flame detector switch condition (TM 9-2320-361-34). Replace flame detector switch if defective (TM 9-2320-361-34). END OF TESTING! TM 9-2320-386-24-1-2 0293 00 0293 00-12