PLATE-CLUTCH-YM 4162133 - Caterpillar

Procedure
Illustration 1 g00477507
(1) G3B Alternator Pulley Nut. (2) L3A Alternator Pulley Nut. (3) K3A Alternator Pulley Nut.
Remove the nut that secures the pulley to the rotating shaft. An impact wrench can be used to loosen the nut. Use a deep well socket (six point). Do not use a twelve point socket.
Illustration 2 g00477509
Alternator (55 Ampere) With Securing Screws (Front Cover) (4) and B Terminal (5) .
Illustration 3 g00477510
Alternator (90 Ampere) With Securing Nuts (Rear Cover) (4) , B Terminal (5) , And Additional Fastener (6) .
Remove the three bolts (4) that attach the rear end cover to the alternator. Also remove the B terminal nut and plastic shroud (5) . On 90 amp alternators, remove the screw (6) .
Illustration 4 g00477511
Remove the two screws (7) that secure the brush holder. Note that the rubber seal that is covering the brush holder in illustration 4 is for 90 amp alternators. The 55 amp alternator has a slightly different seal.
Illustration 5 g00477514
Remove the three screws (8) that secure the IC regulator. The screws are different lengths, and the screws must be put back in the same hole.
Illustration 6 g00477516
Alternator (55 Ampere) With Wire Type Leads From Stator
Illustration 7 g00477517
Alternator (90 Ampere) With Terminal Type Leads From Stator
On 55 ampere alternators, remove the four screws that are holding the stator leads. Use needle nose pliers to straighten the stator leads. On 90 ampere alternators, remove the four screws that are attaching the terminal type leads to the rectifier. Remove the rectifier.
Illustration 8 g00477518
55 Amp Alternator
Illustration 9 g00477519
90 Amp Alternator
Illustration 10 g00477540
A Puller Is Used To Separate The Two Halves Of The Alternator.
A puller (14) is used to separate the two halves of the alternator. Use a puller with an end that is pointed. Do not use a puller with a flat shaft end. Hook the arms of the puller around the inner portion of the case (13) . See illustration 10. Use puller arms with thin, flat bottom hooks (15) . Note: As the case comes apart, ensure that the washer between the rear bearing and the case of the alternator is accounted for. The washer will be reused during reassembly of the alternator.
Illustration 11 g00477541
Use a press to remove the rotor from the front case. Use blocking in order to ensure that the alternator and the press are properly aligned. Ensure that the rotor does not fall to the floor as the rotor is pressed out of the case.
Illustration 12 g00479176
If necessary, remove the front bearing (17) by removing the screws (18) and the retainer plate.