TM9-2320-361-34 17-15. PERSONNEL HEATER FLAME DETECTOR SWITCH MAINTENANCE THIS TASK COVERS: a. Removal d. Assembly b. Disassembly e. Installation c. Cleaning and Inspection INITIAL SETUP APPLICABLE MODELS MATERIALS/PARTS All Five screw-assembled lockwashers TEST EQUIPMENT Multimeter (Appendix B, Item 3) TOOLS General mechanic’s tool kit (Appendix B, Item 1) Tool kit, electrical (Appendix B, Item 2) (Appendix F, Item 169) REFERENCES (TM) TM 9-2320-361-34P EQUIPMENT CONDITION Personnel heater guard removed (para. 17-11). NOTE Tag wires for installation. I a. Removal 1. Remove two screw-assembled lockwashers (8) and ignition control leads (4) from flame detector switch (7). Discard screw-assembled lockwashers (8). 2. Remove screw-assembled lockwasher (1) and blower motor lead (9) from flame detector switch (7). Discard screw-assembled lockwasher (1). 3. Remove two screw-assembled lockwashers (2) and receptacle leads (3) from flame detector switch (7). Discard screw-assembled lockwashers (2). 4. Loosen nut (6) and remove flame detector switch (7) from heater housing (5). I b. Disassembly 1. Remove adjusting screw (10), washer (11), and spring (17) from microswitch (12) and mount (13). CAUTION Ceramic rod is very brittle and is easily broken; handle carefully. 2. Tilt microswitch (12) back on mount (13). 3. Invert microswitch (12) and remove ceramic rod (18) from probe (14). 4. Remove nut (15) and sleeve (16) from probe (14). c. Cleaning and Inspection Inspect flame detector switch (7) for oxidation and dirt, broken ceramic rod (18), and bent or distorted probe (14). If oxidized or dirty, clean by removing ceramic rod (18) and lightly rapping side of probe (14) to loosen oxides and dirt. Replace flame detector switch (7) if ceramic rod (18) is broken or probe (14) is damaged. 17-36