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Alternator - HITACHI: Overhaul: Disassembly

NOTE: Alternators for vehicles with diesel engines may vary slightly, due to vacuum pump mounted on alternator.
  1. Remove through bolts. Separate front cover with rotor from rear cover with stator by lightly tapping on front cover with plastic hammer.
  2. Place front cover and rotor assembly in protected vise with pulley nut up. Use aluminum plates if necessary to prevent vise surfaces from damaging rotor.
  3. Remove pulley nut. Take off pulley, fan and washers. Pull out spacer. Remove rotor. Remove screws from front cover. Lift out bearing retainer and bearing.
  4. Remove attaching nuts. Lift stator, diode assembly and brush assembly from rear cover. Using a soldering iron, disconnect diode assembly, brush assembly and IC regulator together from stator leads.
    NOTE: Melting of solder should be done as rapidly as possible to prevent damage to diodes and IC regulator.
  5. To disconnect diode assembly, remove 1/8" rivet and melt solder on terminal "L".
  6. To replace IC regulator, unsolder regulator terminals. Remove 2 bolts. Do not remove these bolts unless regulator is to be replaced.
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