Chevrolet Chevette/1000 1976-1988 Repair Guide

Alternator

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A Delcotron 10-S1 series alternator is used. This unit also contains a solid state, integrated circuit voltage regulator. The alternator is nonadjustable and requires no periodic maintenance.

The diesel Chevette is fitted with an Hitachi alternator, which is equipped with an IC regulator and drives a vacuum pump mounted at its rear.

ALTERNATOR PRECAUTIONS



The following are a few precautions to observe in servicing the Delcotron (AC) generator and the regulator.

  1. When installing a battery, be certain that the ground polarity of the battery and the ground polarity of the generator and regulator are the same.
  2.  
  3. When connecting a booster battery, be sure to connect the correct battery terminals together.
  4.  
  5. When hooking up a charger, connect the correct leads to the battery terminals.
  6.  
  7. Never operate the car on an open circuit. Be sure all battery, alternator and generator connections are tight.
  8.  
  9. Do not short across or ground any of the terminals on the generator or regulator.
  10.  
  11. Never polarize an AC system.
  12.  
  13. Do not use test lamps of more than 12 volts for checking diode continuity.
  14.  
  15. Avoid long soldering times when replacing diodes or transistors, as prolonged heat will damage them. Always use a heat sink.
  16.  
  17. Always disconnect the battery ground terminal when servicing any AC system. This will prevent accidentally reversing polarity.
  18.  
  19. Always disconnect the battery and AC generator if electric welding equipment is being used on the car.
  20.  
  21. Never jump a battery for starting purposes with more than 12 volts.
  22.  

REMOVAL & INSTALLATION





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Fig. Fig. 1Remove the alternator wiring



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Fig. Fig. 2Exploded view of the alternator mounting and related components



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Fig. Fig. 3Loosen the alternator through-bolt



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Fig. Fig. 4Remove the nut and washer, then ...



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Fig. Fig. 5... remove the alternator through-bolt



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Fig. Fig. 6Remove the alternator from the vehicle

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the alternator wiring. On the Chevette diesel, remove the fan shroud and fresh air duct, then disconnect the oil and vacuum lines at the vacuum pump.
  4.  
  5. Remove the brace bolt and the drive belt.
  6.  
  7. Support the alternator, remove the mounting bolt, and remove the alternator.
  8.  

On the diesel, the mount bolts are removed from below the car.

  1. Installation is the reverse of removal. Adjust drive belt deflection to 1 / 2 " under moderate thumb pressure.
  2.  

 
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