HDB Series and M1 Series Heavy Duty Brushless Alternators Caterpillar


Alternator - Disassemble - HDB Series Alternator

Usage:

769C 01X

Disassembly Procedure

Start By:

  1. Remove the alternator from the machine. Refer to Disassembly and Assembly, "Alternator - Remove" for the machine that is being serviced.

Note: Before disassembly, clean the exterior of the alternator in order to prevent dirt from entering the unit.




    Illustration 1g00825178

  1. Remove pulley nut (2), washer (1), fan (3), and spacer (4) from the rotor shaft.



    Illustration 2g00825176

  1. Remove three bolts (5). Remove the rear cover.



    Illustration 3g00825175

  1. Remove two bolts (6). Disconnect the field winding leads from the regulator. Label the wires. Remove three bolts (7). Remove regulator (8) .



    Illustration 4g00825173

  1. Remove "B-" terminal (15) .

  1. Remove bolt (13). Remove grommet (11). Remove "R" terminal (12) .

  1. Loosen "B+" terminal (9). Remove four bolts (10) and disconnect the stator leads from the rectifier. Label the wires. Remove five bolts (14). Remove rectifier (16) .



    Illustration 5g00825170

  1. For proper alignment during assembly, mark the front frame, the stator, and the rear frame. Mark the locations of the stator leads in the rear frame. Remove four bolts (17). Separate rear frame (18) from front frame (19) .



    Illustration 6g00825168

  1. Mark the location of the field winding leads in the rear frame. Remove three bolts (20). Remove field coil (21) from the rear frame.



    Illustration 7g00825158

  1. Remove roller bearing (22) from the rear frame. The removal of this component requires force.



    Illustration 8g00825156

  1. The stator and the front frame remain marked. Remove stator (23) from the front frame.



    Illustration 9g00825155

  1. Remove rotor (24) from the front frame. The removal of this component requires force.



    Illustration 10g00825154

  1. Remove spacer (25) from the rotor.



    Illustration 11g00825149

  1. Remove three bolts (26). Remove retainer (27) .



    Illustration 12g00825148

  1. Remove ball bearing (28) from the front frame. The removal of this component requires force.

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