b. Rotating Rectifier Assembly

Figure 5-2. Current Boost Transformers CT2 and CT3

TM-9-6115-604-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 5 Kw. 1 Phase-2 Wire 1 Phase -3 Wire 3 Phase -4 Wire 120. 120/240 and 120/208 Volts Manual
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TM 9-6115-604-34 NAVFAC P-8-633-34 (c) Remove strip heaters (59) with a pair of pliers by pulling towards rear of the generator. WARNING Compressed air used for deaning or drying can create airborne particles that may enter the eyes. Pressure shall not exceed 30 psi (207 kPa). Wearing of goggles Is required to avoid Injury to personnel. (2) Inspect. (a) Clean strip heater assemblies (59) of dust and dirt with a dean cloth, brush, or low pressure, moisture- free air. (b) Inspect heater assemblies for cracks, signs of scorching, and other damage. Check heater wires for secure mounting and burned or damaged insulation. Check spring dips for damage and secure mounting. (3) Test. WARNING Failure to exercise caution when working on energized components may result in Injury to personnel. (a) Connect each strip heater to 120 V ac, or connect them both. In series to 240 V ac. Wait 2 minutes. Without touching the strip heaters check for heat emanating along the length of each. NOTE Current draw of each space heater is 2.6 to 4.0 amperes. (b) Disconnect power from the strip heater assemblies (59). Before they cool, measure the resistance of each individual strip heater with a multimeter. A measurement other than 30 to 46 ohms indicates a defective strip heater. Replace defective strip heater. (4) Repair. Replace strip heater (59) If damaged. b. Rotating Rectifier Assembly. (1) Remove. (a) Perform paragraph 5-6, step a(l) through (3). (b) Remove conduit box cover assembly (6) by removing hexagon head screws (5). (c) See detail A, Figure 5-1. Tag and disconnect generator rotor field leads and exciter rotor leads from rotating rectifier assembly by removing nuts (40). (d) Remove four hexagon head screws (50) and lockwashers (51) to detach rotating rectifier assembly from the aluminum standoff (14). (2) Inspect and Clean. (a) Check the rotating rectifier assembly for loose, frayed, or burnt wiring, loose mounting of components, and other damage. Repair or replace as necessary. WARNING Dry cleaning solvent, PD-680 Type III, or equivalent, Is flammable and moderately toxic to the skin, eyes, and respiratory tract. Assure adequate ventilation. Skin, eye, and respiratory protection Is required to avoid Injury to personnel. (b) Clean all metal parts with deaning solvent PD-680, Type 11, or equivalent (c) Clean dust and dirt from the rotating rectifier assembly with a soft cloth or brush. 5-9

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