TM 9-2320-209-34-2-3 FRAME 2 1. 2. 3. 4. GO Clean tube (1) of flame detector switch (2) with wire brush. Check tube for straightness. Get new flame detector switch (2) if tube (1) is not straight. Clean bow spring (3) with wire brush. Bow spring (3) should be straight. Get new flame detector switch (2) if bow spring is bent. Check to see if microswitch (4) clicks by pressing in on shaft (5). Micro- switch (4) should also click when shaft (5) is let out. Get new flame detector switch (2) if microswitch (4) Check that quartz rod (6) is if it is broken or chipped. TO FRAME 3 does not click. not broken or chipped. Get new quartz rod (6) 21-36