Alternators - BOSCH: Overhaul: Disassembly
NOTE:
On 0 120 400 600 series alternators, lift carbon brushes with a hook and secure them, prior to disassembly (see Fig 1).
- Remove nut, pulley, hub and key. Mark location of alternator in blower housing. Unscrew brush plate assembly and remove from alternator. Remove bolts from end frame, then remove frame and field rotor. Press rotor out of end frame. Press ball bearing off rotor. Remove insulating conduit from wires and cut wires as close to soldered joints as possible.
- The diodes may be tested at this point, prior to further disassembly. Care should be exercised with insulating bushings under positive diode carrier. To remove negative carrier, extract threaded studs. When one rectifying diode has been damaged due to short circuiting, the three complementing diodes must be replaced also. Unscrew nuts on both "B+" terminal bolts and lift positive diode carrier (heat sink) up and back.