TM 10-4520-262-12&P                                                    0010 00 0010 00-15 Table 1. Operator Preventive Maintenance Checks and Services Item No. Interval Location Procedure Not Fully Mission Capable If: Item to Check/ Service 17 Weekly Heater Interior Release eight fasteners (1) away from their corresponding keeper plate (2). Remove upper housing assembly (3). Inspect interior of heater for: Any dirt or debris that could be blown through heat exchanger (4) and into the tent. Remove dirt and debris using a clean rag.  Pay special attention to cooling fins (5) on the TEG that could trap bits of paper or other combustibles. Check for any evidence for leaks. Notify Unit maintenance personnel based on leakage class described above. NOTE The heater may be operated with Class I leaks within the heater, but they must be monitored to insure they do not get worse, pose a fire hazard, or cause the heated air being ducted to the tent to smell of fuel oil.   Dirt or other debris present inside heater. Class III Leaks present inside heater. 18 Weekly Electrical Wires and Components Check electrical wires (6), connectors (7) and components for any evidence of overheating, arcing, or burning. Notify Unit maintenance personnel. Any wires or connectors broken or otherwise damaged. 19 Weekly Burner to TEG flange clamp Check that the burner to TEG flange clamp with nut (8) is secure, and provides a leak proof seal between the burner and the TEG. V-clamp with nut is loose or not secure on burner assembly and TEG. Notify unit maintenance. 20 Weekly Wrap Cover Check that the wrap cover (9) is properly installed and tightly fastened down. Wrap cover is loose. Notify Unit mainte- nance. 21 Weekly Exhaust Grommet Check that black exhaust grommet (10) is present and properly installed around the combustion exhaust outlet (11) and is nestled in the cutout (12) on the lower housing assembly. Grommet missing or not properly installed. Notify Unit mainte- nance.