TM  5-6115-329-14 TO  35C2-3-440-1 case for cracks, breaks, corroded terminals or other damage. Test as follows: (1) AC Voltmeter - Apply known external AC voltage source to terminals of meter within range of full scale on meter and take comparative readings. Accuracy  should  be  within  +  2%  (5  volts)  of  full scale at ambient temperature. (2) DC Voltmeter -  Apply  known  external  DC voltage source within range of meter to terminals of meter   and   take   comparative   readings.   Accuracy should be within + 2% of full scale at ambient tem- perature. Replace a defective voltmeter. d.   Installation. (1) Secure voltmeter to the control panel with screws, lockwashers and nuts. (2) Reconnect leads. 4-24.  DC  Percent  Loadmeter  (DOD MODEL MEP-024A Only) Clean  all  parts  in  a  well-ventilated area.   Avoid   inhalation   of   solvent fumes and prolonged exposure of skin to   cleaning   solvent.   Wash   exposed skin thoroughly. Dry cleaning solvent (Fed.  Spec.  P-D-680)  used  to  clean parts is potentially dangerous to per- sonnel and property. Do not use near open  flame  or  excessive  heat.  Flash point of solvent is 100° to 138° F. (38° to 59° C.), a.  Removal. Refer to figure  4-23 and  the  follow- ing instructions and remove the percent loadmeter. (1) Tag and disconnect leads from the percent loadmeter. (2) Remove nuts, lockwashers, and screws se- curing the percent loadmeter on the control panel. (3) Remove the percent loadmeter. b.   Cleaning. (1) Clean  the  percent  loadmeter  case  with  a clean  cloth  dampened  in  cleaning  solvent,  Fed.  Spec. P-D-680, and dry thoroughly. (2) Clean glass using a clean cloth and a mild soap and water solution. c.   Inspection,   Testing   and   Repair. Inspec t glass  for  discoloration,  chips,  cracks,  or  scratches. Inspect  dial  face  for  legibility.  Inspect  loadmeter case for cracks, breaks, corroded terminals or other damage.  Test  as  follows:  Apply  0-50  millivolts  to terminals  of  current  meter.  Meter  should  indicate the  following  within  +  2%  of  full  scale  at  ambient temperature. 0° = 0 m volt 25° = 10 m volts 50° = 20 m volts 75° = 30 m volts 100° = 40 m volts 125° = 50 m volts Replace a defective percent loadmeter. d.   Installation. (1) Secure  the  percent  loadmeter  to  the  con- trol panel with screws, lockwashers, and nuts. (2) Reconnect leads. 4-25.  Load  On/Off  Switch  (DOD  MOD- ELS MEP-014A and MEP-024A). a. Removal. Refer to figure 4-26 and the follow- ing instructions and remove the load switch. (1) Tag and disconnect leads. (2) Remove nut securing load ON/OFF switch to the control panel. (3) Remove load ON/OFF switch. b. Cleaning. Clean the load switch using a clean cloth. 4-41