G3B, K3A and L3A Denso Alternators Caterpillar

Procedure

Show/hide table



Illustration 1	g00479176

1. If the front bearing (17) has been removed or replaced, install the bearing. Secure the bearing by attaching the retainer plate with four screws (18) .

Show/hide table



Illustration 2	g00480826

2. Slide the rotor shaft into the front bearing.

Show/hide table



Illustration 3	g00477542

3. Slide the rear case of the alternator over the rear of the rotor shaft. Ensure that the washer (16) that is shown in illustration 3 is in position (A) . Position (A) is between the rear bearing and the case of the alternator. Ensure that the stator leads go through the proper slots in the rear case. The two halves of the case will probably not be able to be pushed together. Initially, use hand pressure in order to press the case together.

Show/hide table



Illustration 4	g00477519

4. Insert the four screws or bolts (11) and tighten finger tight. Tighten each screw or bolt with a socket wrench. Tighten the screws or bolts in a cross pattern until the two halves of the case are brought together. Push the rubber bushings (12) into position over the stator leads on 90 amp alternators.

Show/hide table



Illustration 5	g00477516
Alternator (55 Ampere) With Wire Type Leads From Stator

Show/hide table



Illustration 6	g00477517
Alternator (90 Ampere) With Terminal Type Leads From Stator

5. Place the rectifier in position. On 55 ampere alternators, use needle nose pliers in order to bend the lead wire (9) into position. A screw then secures the leads to the rectifier. On 90 ampere alternators, align the terminals of the rectifier with the terminal type leads from the stator (10) . Use four screws to secure the two terminals together.

Show/hide table



Illustration 7	g00477514

6. Place the voltage regulator in position and secure the regulator with screws (8) . Use screws that are the proper length, which was noted during disassembly of the alternator.

Show/hide table



Illustration 8	g00477511

7. Attach the brush to the voltage regulator by using two screws (7) . Push back the spring-loaded brushes as the brush assembly slides over the rotor. Ensure that the rubber seal is in the proper position.

Show/hide table



Illustration 9	g00477509

8. Place the rear alternator cover in position and secure the cover with three screws (4) (55 amp alternators). Secure the cover with three nuts on 90 amp alternators.

9. Slide the insulator (5) onto the B terminal and secure the insulator with a nut.