TM 5-6115-545-34 (8) Repeat paragraphs (5), (6), and (7) above for other c. Installation. Refer to Operator and Organizational lights,  connecting  pin  C  to  pins  F,  G,  H,  I,  K,  L,  M,  and  N. Maintenance Manual and install the fault indicator. Section  III.  CONTROL  CUBICLE 3-5. Removal, Disassembly and Repair. WARNING To avoid serious injury to personnel before do- ing  any  work  in  the  control  cubicle,  be  sure  all power  circuits  are  disconnected.  Never  work  in the control cubicle while the engine is running. Killing  voltages  are  present. a. Removal. Refer to Operator and Organi- zational Maintenance Manual and remove the control cubicle. b. Disassembly. Refer to Operator and Organizational Maintenance Manual and disassemble the control cubicle, See  figure  3-3  and  disassemble  the  relay  assembly. (1) Clean all components with low pressure compressed air, or wipe clean with dry, lint free cloth. (2)  Inspect  for  broken  fuseholders,  cracked  or  broken lamp holders, damaged meters, broken terminals on com- ponents, damaged wire insulation, broken wires and bent or  broken  connector  pins. (3) Replace any components which show visual damage, such as cracked or broken meters, broken lamp holders, or cracked  or  broken  switches  and  rheostats. (4)  Inspect  control  panel  relay  assembly  for  damage. Replace component (fig. 3-3) if damage is evident. If any connections are opened or bared for test purposes, or if any defective  components  are  replaced,  the  effected  areas  and components must be coated with polyurethane resin to pre- vent oxidation or other corrosion. The coating must be a minimum of 0.007 inches and air bubble entry into the ap- plied polyurethane must be controlled so that the legibility of component coding and identification is not impaired. The polyurethane resin to be utilized will correspond to MIL- I-46058 grade S, Type PUR. 3-6.  AC  Wattmeter  Convertor  Testing. To test the ac wattmeter of the control cubicle proceed as follows: b.  Start  the  generator  set. — c. Vary load and compare the readings of the ac watt- meter  on  the  set  with  readings  of  the  master  wattmeter. d. The operating set wattmeter error must not exceed 10 percent of full scale value. If it does, replace the ac watt- meter. If it does not, proceed to para 3-7. 3-7. Transducer Testing. To test the control cubicle watt transducer, proceed as follows; a.  Connect  the  watt  transducer  to  the  test  equipment as illustrated in figure 3-4. Use a calibrated % of rating meter. b. Adjust all autotransformers T1, T2 and T3 to their MIN  positions. c. Close switch S1 and open switches S2 and S3. d.  Energize  the  power  source. — e. Adjust T1 until 600 milliamperes is indicated on am- meter A1. The % of rating meter of known accuracy should indicate approximately 33%. f. Close switch S2 and adjust T2 until 600 milliamperes is indicated on ammeter A2. The % of rating meter should indicate approximately 66%. g. Close switch S3 and adjust T3 until 600 milliamperes is indicated on ammeter A3. The  % of rating meter of known accuracy  should  indicate  100%. h. Replace the thermal watt transducer if it does not — satisfy  the  above  requirements. i.  If  the  transducer  meets  the  above  requirements, replace the wattmeter. 3-8. AC Ammeter Testing. To test the ac ammeter of the control cubicle, proceed as follows: a. Connect a suitable master ac current meter in series — with the set ac current meter. b. Start the unit and connect a variable load to the output — terminals  and  compare  the  readings  of  the  two  meters. c. The generator set ac ammeter error must not be greater than 2 percent of full scale value. If it is, replace the ac ammeter. a. Connect a master 3-phase wattmeter of known accuracy (1/2 of 1 percent) and a suitable variable load to the  output  of  terminal  lugs  of  the  generator  set. 3-4 Change 8