TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 wire. (2) Crimp lugs on lead wires, then install resistor (38) into clip (41).  Secure lugs (36) to standoff (37) with nuts (35). Section II.  BATTERY CHARGER 4-5.  GENERAL.  This section covers inspection, replacement, testing, and repair of the battery charger. 4-6.  DESCRIPTION.  The battery charger transforms 120V AC to 24V DC at 20 amperes to charge the generator set batteries.  It automatically senses the condition of the batteries and delivers the amount of current required to keep the batteries fully charged.  The battery charger has a built-in cut out relay to prevent battery drain in the event of an AC power failure.  Figure 4-3 is the battery charger schematic. 4-7.   INSPECTION.    Check  battery  charger  input  and  output  cable  connections  for  looseness  or  corrosion.    Check  all components  for  loose  mounting,  poor  solder  connections,  broken  wires,  overheated  resistors,  or  any  other  signs  of damage. 4-8.  REMOVAL AND REPLACEMENT. a.   Removal.  (See figure 4-1.)  The battery charger (45, figure 4-1) is mounted to the right side wall of the AC-DC control box assembly enclosure.  Open door (73) and remove as follows: WARNING BEFORE STARTING ANY MAINTENANCE PROCEDURE, SET MAINTENANCE LOCK-OUT SWITCH TO   LOCKOUT.      DISCONNECT   NEGATIVE   CABLE   FROM   BATTERIES.      REMOVE   EXTERNAL POWER  BY  OPENING  CB101  (EXTERNAL  POWER  CIRCUIT  BREAKER)  AND  DISCONNECTING POWER CABLE FROM RECEPTACLE J101 (120V RECEPTACLE). (1) Open battery charger door. Legend For Figure 4-1 1.  Screw 29.  Nut/washer 57A.Lug 2.  Nut/washer 30.  Terminal block 58A.Washer 3.  Ac-dc panel 31.  Screw 59.  Screw 4.  Spacer bar 32.  Nut 60.  Clip 5.  Stripping 33.  Relay K20 61.  Screw/washer 6.  Screw 34.  Screw 62.  Bracket 7.  Cover 35.  Nut 63.  Screw 8.  Connector 36.  Lug 64.  Washer 9.  Washer 37.  Standoff 65.  Washer 10.  Nut 38.  Resistor 66.  Nut 11.  Screw/washer 39.  Screw 67.  Screw 12.  Nut 40.  Nut 67A.Washer 13.  Screw, washer 41.  Clip 68.  Washer 14.  Nut 42.  Screw 69.  Nut 15.  Screw 43.  Panel 70.  Ac-dc box 16.  Nut/washer 44.  Screw/washer 71.  Screw 17.  Clamp 45.  Battery charger 72.  Nut 18.  Clamp 46.  Screw 73.  Door assembly 19.  Clamp 47.  Washer 74.  Seal 20.  Clamp 48.  Voltage Regulator 75.  Enclosure assembly 21.  Screw/washer 49.  Screw 22.  Clamp 50.  Nut 23  Harness 51.  Clamp 24.  Screw 52.  Screw 25.  Nut/washer 53.  Nut 26.  Terminal block 53A.Resistor assembly 26A.Jumper 54.  Potentiometer 27.  Diode 55.  Lock 27A.Lug 56.  Governor 28.  Screw 57.  Sleeve 4-2