Delco 27SI Disassembly and Assembly – Alternator – Disassemble

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.

Note: The illustrations of the procedures below show the 3T-6352 Alternator Gp. The procedures for the other 27-SI alternators are similar.

 Illustration 1 g00901387
Alternator

(1) Pulley nut

(2) Fan

(3) Shield

(5) Front Frame (Drive Frame)

(6) Rear Frame

(7) Rotor

(8) Ball bearing

(9) Screws (three)

(10) Retainer

(11) Screw

(12) Screws (four)

(13) Plate

(14) Nuts (three)

(15) Screw

(17) “R” Terminal

(18) Strap

(19) Screws (two)

(20) Regulator

(21) Diode assembly

(22) Screw

(23) Nut

(24) Strap

(26) Nut

(27) “B+” Terminal

(28) Strap

(29) Screw

(31) Capacitor

(32) Screw

(33) Rectifier

(35) Stator

(36) Screws (four)

(37) Field winding

(38) Roller bearing

(39) Collar

(40) Collar

  1. Remove pulley nut (1) .

 

  1. Remove the pulley and fan (2) .

 

  1. Remove shield (3). Remove four bolts (4). Separate front frame (5) from rear frame (6) .

 

  1. Attach the puller, as shown. Remove front frame (5) from rotor (7). Remove collars (40) and (39) .

 

  1. Remove three screws (9) and retainer (10). Use a puller to remove ball bearing (8) from front frame (5) .

 

  1. Remove screw (11) at the “B-” terminal. Remove four screws (12). Remove plate (13) from rear frame (6) .

 

  1. Remove three nuts (14). Disconnect the stator leads from rectifier (33) .

 

  1. Remove screw (15) at the battery terminal of rectifier (33) .

 

  1. Loosen nut (16). Remove “R” terminal (17) and strap (18) together.

 

  1. Remove two screws (19) at the field winding terminals of regulator (20). Remove diode assembly (21) .

 

  1. Remove screw (22) at the ground terminal of rectifier (33). Remove nut (23) at the ground terminal of regulator (20). Remove strap (24) .

 

  1. Remove insulator (25) and loosen nut (26). Remove “B+” terminal (27) and strap (28) together.

 

  1. Remove screw (29) and regulator (20) .

 

  1. Remove screw (30) and capacitor (31) .

 

  1. Remove screw (32) and rectifier (33) .

 

  1. Loosen grommet (34) and remove stator (35) from rear frame (6) .

 

  1. Remove four screws (36). Remove field winding (37) from rear frame (6) .

 

  1. If necessary, remove roller bearing (38) from rear frame (6) .

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