TM 9-6115-604-34 NAVFAC P-8-633-34 1. HEXAGON HEAD SCREW 35. REVERSE POLARITY RECTIFIER AND 2. HEXAGONAL NUT ATTACHING HARDWARE 3. SCREEN ASSEMBLY 36. STANDARD POLARITY RECTIFIER AND 4. DRIP COVER ASSEMBLY ATTACHING HARDWARE 5. HEXAGON HEAD SCREW 37. SURGE PROTECTOR 6. CONDUIT BOX COVER ASSEMBLY 38. RETAINER RING 7. SEAL 39. BALL BEARING 8. HEXAGON HEAD SCREW 40. NUTS 9. BELLEVILLE WASHER 41. LEAD 10. EXCITER STATOR ASSEMBLY 42. LEAD 11. LEAD SHIELD 43. TERMINAL 12. HEXAGON HEAD SCREW 44. TERMINAL 13. EXCITER ROTOR ASSEMBLY 45. HEXAGON HEAD SCREW 14. STANDOFF 46. LOCKWASHER 15. ROTOR ASSEMBLY 47. SCREW 16. HEXAGON HEAD SCREW 48. RECTIFIER ANGLE 17. LOCKWASHER 49. INSULATOR PLATE 18. BEARING CAP 50. HEXAGON HEAD SCREW 19. BRACKET 51. LOCKWASHER 20. HEXAGON HEAD SCREW 52. WOUND ARMATURE ASSEMBLY 21. PLAIN WASHER 53. HEXAGON HEAD SCREW 22. COUPLING DRIVE DISC 54. BELLEVILLE WASHER 23. HUB 55. FAN 24. SPACER PLATE 56. SETSCREW 25. MACHINING ADAPTER 57. HUB KEY 26. HEXAGON HEAD SCREW 58. MOUNTING KEY 27. LOCKWASHER 59. STRIP HEATER 28. HEXAGON HEAD SCREW 60. MOUNTING SCREW 29. MOUNTING WASHER 61. MOUNTING SCREW 30. GROUNDING BOLT 62. MOUNTING BRACKET 31. GROUNDING WASHER 63. STUD 32. CONDUIT BOX ASSEMBLY 64. LOCKWASHER 33. COIL ASSEMBLY 65. HEXAGONAL NUT 34. HEXAGON HEAD SCREW Figure 5-1.  Generator Gl and Related Parts (Sheet 3 of 3) (3) Tag and disconnect rectifier leads on the rotating rectifier assembly (detail A, Figure 5-1). (4) Disconnect the three exciter armature leads from the rotating rectifier assembly and tag according to phase (phase A, B, and C). (5) Obtain a 500 V dc megohmmeter.  Connect leads as shown below and operate megohmmeter 60 seconds for each set.  Monitor resistance reading for each set tested.  Short black megohmmeter lead to ground after each test with exciter armature leads still connected. (a) Phase A to phase B (b) Phase B to phase C (c) Phase C to phase A (d) Phase A to ground (e) Phase B to ground (f)  Phase C to ground (6) Megohmmeter reading for each phase-to-phase test (A to B, B to C, and C to A) should indicate greater than  1  megohm.    Clean,  dry,  or  repair  exciter  rotor  assembly  if  megohmmeter  indicates  greater  than  1 ohm, and retest.  Repair or replace exciter rotor assembly if any phase to phase test indicates less than 1 megohm. 5-6