Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

IC Regulator and Brushes

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REMOVAL & INSTALLATION



All models are equipped with internal voltage regulator. Since the regulator is part of the alternator, no adjustments are possible or necessary.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the alternator from the vehicle.
  4.  
  5. Carefully remove the 3 or 4 long through bolts. Be careful not to damage the bolt head. Place a matchmark on the 2 case halves before disassembly.
  6.  
  7. Lightly tap on the rear housing and separate the 2 housings. If the halves will not come apart. Heat the rear housing bearing boss with a 200 watt soldering iron. Do not use heat gun, internal components may be damaged.
  8.  
  9. Remove the diode and brush holder assembly nuts from the rear case. Label all nuts and insulators before removal.
  10.  
  11. Remove the IC regulator from the housing.
  12.  
  13. Remove the brushes from the brush holder. Some units have soldered brush wires. Using a 200 watt soldering iron, remove the brush wire from the brush holder.
  14.  

To install:
  1. Install the brush into the holder so the wire is through the hole.
  2.  
  3. Solder the wire and make sure the brush moves freely inside the brush holder.
  4.  
  5. Install the brush holder, IC regulator and diode assembly into the rear case. Install the retaining nuts and insulators. Torque the nuts to 36 inch lbs. (4 Nm).
  6.  
  7. Push the brushes into the holder and insert a wire through the rear housing into the brush holder to retain the brushes during installation.
  8.  
  9. Carefully install the 2 case halves together, making sure the brushes are held in place.
  10.  
  11. After the halves are together, install the through bolts and torque to 48 inch lbs. (5.5 Nm).
  12.  
  13. Remove the brush retaining wire and install the alternator to the vehicle.
  14.  
  15. Adjust belt tension and reconnect all wiring.
  16.  
  17. Start the engine and check operation.
  18.  

 
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