MAINTENANCE OF DC -CIRCUIT BREAKERS CB1 AND CB2

Figure 4-28. Speed Switch Sensitivity Tests

Figure 4-29. DC Circuit Breakers CB1 and CB2

TM-9-6115-604-12 Generator Set Diesel Engine Driven Tactical Skid Rtd. 60 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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ARMY TM 9-6115-604-12 NAVY NAVFAC P-8-633-12 4-29. MAINTENANCE OF DC -CIRCUIT BREAKERS CB1 AND CB2. See Figure 4-29. Both circuit breakers provide an automatic safety disconnect of battery power from their respective circuits IN the event of a short circuit or circuit overload. a. Remove. (1) Disconnect battery power and turn off battery charger circuit breaker CB7 (7, Figure 2-7). (2) Tag and disconnect wiring to circuit breaker CB1 or CB2 (6 or 7, Figure 4-29). (3) Remove screw and captive washer assembly (1 or 2), nut and captive washer assembly (3), flat washer (4), and mounting bracket (5). (4) Remove circuit breaker CB1 or CB2 (6 or 7) b. A. Test each circuit breaker using a MSIA circuit breaker tester. Ensure dc power circuit breaker, CB1, trips at 20 amps and emergency lights circuit breaker, CB2, trips at 15 amps. c. Install. (1 ) Position circuit breaker CB1 or CB2 (6 or 7, figure 4-29) into mounting bracket (5). (2) Attach mounting bracket (5) using screw and captive washer assembly (1 or 2), nut and captive washer assembly (3), and flat washer (4). (3) Connect electrical wiring and discard tags. (4) Reconnect battery power and turn on battery charger CB7. 4-30. MAINTENANCE OF FUEL LEVEL SWITCHES FL1 THROUGH FL4 . See Figure 4-30. The switch assembly, containing FL1 FL2 FL3, and FL4 (10, figure 3-16) is mounted in top of the fuel tank. The switches are used to turn the fuel transfer pump on and off, to give a warning indication if fuel is low, and to give a warning indication and disconnect fuel transfer pump system If fuel level becomes too high. The fuel tank, even when empty, may contain explosive fumes or vapors. Do not expose tank in vicinity of any source of intense heat. Smoking is prohibited within 50 foot (15 meters) of the work area. Failure to heed this warning may result In death or injury. a. Remove. See figure 4-31. The fuel tank, even when empty, may contain explosive fumes and vapors. Do not work on tank in the vicinity of any source of intense heat. Smoking is prohibited within 50 feet (15 meters) of the work area. Failure to heed this warning may result in death or serious injury. (1) Turn FUEL PUMP switch S8 on generator control cabinet C to OFF position. CAUTION Fuel which is to be reused must be kept tree from contaminants. Drain fuel to be reused only Into a container which has been thoroughly cleaned. (2) Open the fuel drain valve (34) and drain fuel into a suitable container. (3) Remove the control room fire extinguisher and bracket In accordance with paragraph 4-12. (4) Remove hexagon head cap screws (44), hexagonal nuts (45), and lock washers (46), and remove rear door stop door plate (47). 4-81

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