Section I. INTRODUCTION - TM-9-4520-258-24P_6(1) Source Code.(2) Maintenance Code. 4. EXPLANATION OF COLUMNS b. PART NUMBER INDEX. 5. SPECIAL INFORMATIONFigure 1. Exhaust Pipe and Elbow.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_13Figure 2. Flexible Air Ducts.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_15Figure 3. Control Box Cover.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_17Figure 4. Top Panel Assembly (Sheet 1 of 2).Figure 4. Top Panel Assembly (Sheet 2 of 2).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_20DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_21Figure 5. Rear Panel Assembly (Sheet 1 of 3).Figure 5. Rear Panel Assembly (Sheet 2 of 3).Figure 5. Rear Panel Assembly (Sheet 3 of 3).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_25DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_26DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_27Figure 6. Front Side Door Assembly.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_29Figure 7. Rear Side Door Assembly.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_31Figure 8. Air Inlet Cover and Guard.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_33Figure 9. Dust Cover and Inlet/Discharge ScreenDESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_35Figure 10. Control Assembly, ElectricalTM-9-4520-258-24P_37Figure 11. Time Meter, Circuit Breakers, Switches and Light Indicators.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_39Figure 12. Ground Wire, Terminal Strips and Transformer. DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_41Figure 13. Control Box (Sheet 1 of 2).Figure 13. Control Box (Sheet 2 of 2)DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_44Figure 14. Fuel Pressure Gauge, Tubing and Nameplate.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_46Figure 15. Air Pressure Switch and Combustion Control Relay (Sheet 1 of 2).Figure 15. Air Pressure Switch and Combustion Control Relay (Sheet 2 of 2).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_49Figure 16. External Fuel Hose Assembly.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_51Figure 17. Fuel Tube Assemblies.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_53Figure 18. Fuel Tank Top Assembly (Sheet 1 of 2).Figure 18. Fuel Tank Top Assembly (Sheet 2 of 2).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_56Figure 19. Fuel Drain Cover, Ring Filler Neck and Tank Isolator.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_58Figure 20. Circulating Air Fan/Fuel Pump/Motor Assembly.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_60Figure 21. Fuel Solenoid Valves and Fittings.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_62Figure 22. Blower Wheel, Fan Scroll and Base.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_64Figure 23. Fuel Pump and Vent Blower Motor.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_66Figure 24. Combustion Air Fan and Mount Assembly (Sheet 1 of 2). Figure 24. Combustion Air Fan and Mount Assembly (Sheet 2 of 2)DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_69Figure 25. Heat Exchanger (Sheet 1 of 2). Figure 25. Heat Exchanger (Sheet 2 of 2).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_72Figure 26. Thermostat Assembly and Cover Plate (Heat Exchanger). DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_74Figure 27. Detector Flame, Cable, Tube and Mounting Ring (Heat Exchange) (Sheet 1 of 2)Figure 27. Detector Flame, Cable, Tube and Mounting Ring (Heat Exchanger) (Sheet 2 of 2).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_77Figure 28. Sight Glass, Support, Clamp and Saddle (Heat Exchanger).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_79Figure 29. Shell, Heat Exchanger and Burner Assembly (Sheet 1 of 2).Figure 29. Shell, Heat Exchanger and Burner Assembly (Sheet 2 of 2). DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_82Figure 30. Remote Thermostat Assembly (Thermostat and Cable) (Sheet 1 of 2).Figure 30. Thermostat Assembly (Thermostat and Cable) (Sheet 2 of 2)DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_85Figure 31. Power Cable Assembly (P1).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_87Figure 32. External Electrical Lead AssemblyDESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_89Figure 33. Internal Power Thermostat Cable (J3).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_91Figure 34. Jack Assembly.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_93Figure 35. Wheel Assembly and Pivot.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_95Figure 36. Air Damper Assembly (Sheet 1 of 2).Figure 36. Air Damper Assembly (Sheet 2 of 2).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_98DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_99Figure 37. Tie Down Ring and Informational Plates.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_101Figure 38. Handbook Compartment.DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_103Figure 39. Support and Bar (Control Box).DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_105Figure 40. Frame AssemblyDESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_107DESCRIPTION AND USABLE ON CODES - TM-9-4520-258-24P_108SECTION IV STOCK NUMBER INDEXNATIONAL STOCK NUMBER INDEX - TM-9-4520-258-24P_110NATIONAL STOCK NUMBER INDEX - TM-9-4520-258-24P_111NATIONAL STOCK NUMBER INDEX - TM-9-4520-258-24P_112NATIONAL STOCK NUMBER INDEX - TM-9-4520-258-24P_113PART NUMBER INDEX - TM-9-4520-258-24P_114PART NUMBER INDEX - TM-9-4520-258-24P_115PART NUMBER INDEX - TM-9-4520-258-24P_116PART NUMBER INDEX - TM-9-4520-258-24P_117PART NUMBER INDEX - TM-9-4520-258-24P_118PART NUMBER INDEX - TM-9-4520-258-24P_119PART NUMBER INDEX.PART NUMBER INDEX - TM-9-4520-258-24P_121PART NUMBER INDEX - TM-9-4520-258-24P_122PART NUMBER INDEX - TM-9-4520-258-24P_123PART NUMBER INDEX - TM-9-4520-258-24P_124PART NUMBER INDEX - TM-9-4520-258-24P_125PART NUMBER INDEX - TM-9-4520-258-24P_126PART NUMBER INDEX - TM-9-4520-258-24P_127PART NUMBER INDEX - TM-9-4520-258-24P_128PART NUMBER INDEX - TM-9-4520-258-24P_129PART NUMBER INDEX - TM-9-4520-258-24P_130FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_131FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_132FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_133FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_134FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_135FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_136FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_137FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_138FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_139FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_140FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_141FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_142FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_143FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_144FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_145FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_146FIGURE AND ITEM NUMBER INDEX - TM-9-4520-258-24P_147