Table 4-1. Organizational Preventive Maintenance Checks and Services Quarterly Schedule -cont

TM 10-7360-204-13&P Change 11 4-3 Table 4-1. Organizational Preventive Maintenance Checks and Services Quarterly Schedule (Continued) Item No. Item to be Inspected Procedures Burner Assembly 9 Main Generator Inspect generator flame valve for leaks and improper operation. Check for leaks between valve stem and packing nut by using soapy solution. If valve leaks, tighten nut or repair valve (para 3-4.1). Check for improper operation by turning the flame valve knob counterclockwise to open the valve. The knob should positively stop when completely opened. Any knob failing to positively stop when fully openedshould have the packing nut tightened or by replacing the packing (para 3-4.1). Inspect generator for carbon deposits, dents, breaks, and loose connections. Replace a defective generator ( para 4-9.2). 10 Burner Inspect for breaks, loose mounting, and clogged slots. During operation, check for erratic burning and blue or yellow flame. Replace a defective burner (para 4-9.3). 11 Air Pressure Gage Inspect for breaks, broken glass, or bent needle. Check with tank filler cap removed to determine the gage reads zero. Then check after filling tank and closing tank filler cap, the gage will indicate a steady even increase in pressure as the tank is pressurized with the hand pump. If the gage will not pass above visual inspection and tests, the gage shall be replaced (para 4-9.5). 12 Air Control Shutter and Mixing Chamber Inspect shutter for binding, loose mounting and damaged control lever. Tighten mounting hardware. Inspect mixing chamber for cracks. Replace any defective parts (para. 4-9.3). Use extreme care when utilizing the air compressor to pressurize the fuel tank. 13 Safety Valve Device Inspect device for improper operation, leaks, loose hardware for bent tubing. Safety system for proper functioning. DRAIN FUEL TANK. Using air compressor, pressurize tank to approximately 60 (PSIG) where the safety valve should operate. After the safety opens, pressure should drop rapidly to approximately 35 ± 10 PSIG at which point the safety valve should close. Using soapy solution, check for leaks. Set burner unit on end and turn fuel filler cap slowly counterclockwise to release air pressure. Tighten any loose hardware. Replace defective device (para 4-9.10). Section V. TROUBLESHOOTING 4-7. GENERAL. This section provides information useful to organizational maintenance personnel in diagnosing and correcting unsatisfactory operation or failure of the field range outfit. 4-7.1 TROUBLESHOOTING. Refer to table 4-2 for a listing of the possible malfunctions that may occur in the field range outfit. WARNING