TM 5-6115-332-14 P-8-614-14 TO  35C2-3-424-1 b. Cleaning, Inspection and Repair. (1)  Carefully  and  thoroughly  clean  the  exte- rior of the voltmeter with a clean lint free cloth. (2)  Inspect  the  voltmeter  for  signs  of  burned areas, damaged threads, loosened contacts, and for loose or broken glass. (3) Replace a damaged or defective voltmeter. c. Installation. (1) Secure voltmeter to the control panel with screws, washers, and nuts. (2)  Reconnect  wiring. d. Testing. Test voltmeter by connecting an ad- ditional voltmeter to load terminals of generator set and taking comparative reading to establish valid- ity of generator set voltmeter. 4-34. Frequency Meter (M1). a. Removal. Refer to figure 4-24 and the follow- ing instructions to remove the frequency meter. (1)  Tag  and  disconnect  leads  from  the  fre- quency meter. (2)  Remove  nuts,  washers,  and  screws  secu- ring the frequency meter to the control panel. (3)  Remove  frequency  meter. b. Cleaning, Inspection and Repair. (1)  Carefully  and  thoroughly  clean  the  exte- rior  surfaces  of  the  frequency  meter  with  a  clean lint free cloth. (2)  Inspect  the  frequency  meter  for  signs  of burned areas, damaged threads, loosened contacts, and for loose or broken glass. (3) Replace a damaged or defective frequency meter. c. Installation. (1)  Position  frequency  meter  in  place  on  con- trol  panel  and  secure  with  screws,  washers,  and nuts. (2)  Reconnect  leads. d. Testing. (1) Disconnect frequency meter leads and con- nect a frequency meter of known quality and take comparative readings to establish validity of gener- ator set frequency meter. (2)  Reconnect  leads. 4-35. Current Indicator Meter (M5). a. Removal. Refer to figure 4-24 and the follow- ing instructions to remove the current indicator me- ter. (1) Tag and disconnect leads. (2)  Remove  nuts,  washers,  and  screws  secu- ring the current indicator meter to the control pan- (3) Remove the current indicator meter. b. Cleaning, Inspection and Repair. (1)  Carefully  and  thoroughly  clean  the  exte- rior surfaces of the current indicator meter with a clean lint free cloth. (2)  Inspect  the  current  indicator  meter  for signs  of  burned  areas,  damaged  threads,  loosened terminals, and for loose & broken glass. (3) Replace a damaged or defective current in- dicator meter. c. Installation. (1)  Position  the  current  indicator  meter  in place on the control panel and secure with screws, washers, and nuts. (2)  Reconnect  leads. d. Testing. (1)  Disconnect  current  indicator  meter  and connect a current indicator meter of known quality and take comparative readings to establish validity of generator set current indicator meter. (2)  Reconnect  leads. 4-36. Ammeter Phase Selector Switch (S2). a. Removal. Refer to figure 4-24 and the follow- ing instructions to remove the ammeter phase selec- tor switch. (1)  Tag  and  disconnect  leads  from  the  am- meter phase selector switch. (2)  Loosen  setscrew  securing  control  knob  on the   ammeter   phase   selector   switch   and   remove knob. (3)  Remove  locking  nut  and  washer  securing the  ammeter  phase  selector  switch  to  the  control panel. (4)  Remove  the  ammeter  phase  selector switch. b. Cleaning, Inspection and Repair. (1)  Carefully  and  thoroughly  clean  the  exte- rior surfaces of the ammeter phase selector switch using a clean lint free cloth. (2)  Inspect  switch  for  signs  of  burned  areas, damaged threads, cracks, or loosened contacts. (3)  Replace  a  damaged  or  defective  ammeter phase selector switch. c. Installation. (1)  Position  the  ammeter  phase  selector switch in place on the control panel and secure with washer and nut. (2) Place control knob over end of switch shaft and secure by tightening setscrew. (3)  Reconnect  leads. el. 4-53