TM 5-6115-434-12 Caution Do not exceed an output of 30 volts If  output  voltage  can  be  read  on  the  multimeter  and  the  voltage  can  be  adjusted  between  24  volts  and  30  volts,  the charger is operating satisfactorily. (4) Adjustment.    With  the  leads  disconnected  from   «the  positive  and  negative  terminals  and  a  multimeter connected, turn the voltage adjust screw until the voltage output is 28 volts.  Disconnect the multimeter and reconnect the leads to the positive and negative terminals. (5) Installation.  Install in reverse order of removal procedure. J. Transformer 400 Hz (three used) (1) Removal.  Tag and disconnect electrical connections to transformer and electrical leads passing 'through the center of transformer.  Remove four screws and eight washers from transformer.  Remove transformer. (2) Cleaning and inspection. (a) Clean transformer with filtered compressed air or wipe with a clean rag moistened with an approved cleaning solvent. (b) Visually   inspect   for   corrosion,   cracks,   damaged   threads,   excessive   heat   or   other   evidence   of damage. (3) Installation. Install in reverse order of removal procedure. k. Thermal Relay (three used). (1) Removal. Remove two screws and cover from relay.  Tag and remove electrical leads and bus bars from relay.  Remove two screws and four washers from relay.  Remove thermal relay. (2) Cleaning and inspection. (a) Clean  relay  with  compressed  air  or  wipe  with  a  clean  rag  moistened  with  an  approved  cleaning solvent. (b) Visually inspect relay for corrosion, cracks, damaged threads, excessive heat or other evidence of damage. (3) Installation.  Install in reverse order of removal procedures. I. Shunt. (1) Removal.    Tag  and  remove  electrical  leads  from  shunt.    Remove  two  screws  and  washers  from  shunt. Remove shunt. (2) Cleaning and inspection. (a) Clean  shunt  with  filtered  compressed  air  or  wipe  with  a  clean  rag  moistened  with  an  approved cleaning solvent. (b) Visually inspect shunt for corrosion, cracks, damaged threads or other evidence of damage. (3) Installation.  Install in reverse order of removal procedures. m. Terminal Board (two used) (1) Removal.  Remove snap on cover from terminal board.  Tag and remove electrical connections and bus bars from terminal board.  Remove two nuts, two washers and two screws from terminal board.  Remove terminal board. (2) Cleaning and inspection. (a) Clean  terminal  board  with  filtered  compressed  air  or  wipe  with  a  clean  rag  moistened  with  an approved cleaning solvent. (b) Visually inspect terminal board for evidence of corrosion, cracks, damaged threads or other evidence of damage. (3) Installation.  Install in reverse order of removal procedures. 3-62.  Lower Rack Assembly (fig. 3-20) Note Access to lower rack assembly is obtained by removing the gas turbine engine power plant access panel (fig. 1-2) Tag or otherwise identify electrical connections as removed to facilitate assembly. a. Relay (K1) (1) Removal.    Tag  and  disconnect  electrical  connections  and  bus  bar  from  relay.    Remove  four  screws  and eight washers from relay.  Remove relay. (2) Cleaning and Inspection. (a) Clean relay with filtered compressed air or wipe relay with a clean rag moistened with an approved cleaning solvent. (b) Visually inspect relay for corrosion, cracks, damaged threads or other evidence of damage. (3) Installation.  Install in reverse order of removal procedures. b. Relay (K11). (1) Removal.  Remove terminal post cover from relay.  Tag and disconnect electrical connections from relay. Remove four screws and eight washers.  Remove relay. 3-73