Dodge Ram Truck 1500-2500-3500. Manual — part 331
GENERATOR
DESCRIPTION
The generator is belt-driven by the engine using a serpentine type drive belt. It is serviced only as a complete
assembly. If the generator fails for any reason, the entire assembly must be replaced.
OPERATION
As the energized rotor begins to rotate within the generator, the spinning magnetic field induces a current into the
windings of the stator coil. Once the generator begins producing sufficient current, it also provides the current
needed to energize the rotor.
The stator winding connections deliver the induced alternating current to 3 positive and 3 negative diodes for rec-
tification. From the diodes, rectified direct current is delivered to the vehicle electrical system through the generator
battery terminal.
Although the generators appear the same externally, different generators with different output ratings are used on
this vehicle. Be certain that the replacement generator has the same output rating and part number as the original
unit. Refer to Generator Ratings in the Specifications section at the back of this group for amperage ratings and part
numbers.
Noise emitting from the generator may be caused by: worn, loose or defective bearings; a loose or defective drive
pulley; incorrect, worn, damaged or misadjusted fan drive belt; loose mounting bolts; a misaligned drive pulley or a
defective stator or diode.
8F - 44
CHARGING
DR/DH
REMOVAL
3.7L / 4.7L
WARNING: DISCONNECT NEGATIVE CABLE FROM BATTERY BEFORE REMOVING BATTERY OUTPUT WIRE
(B+ WIRE) FROM GENERATOR. FAILURE TO DO SO CAN RESULT IN INJURY OR DAMAGE TO ELECTRICAL
SYSTEM.
1. Disconnect negative battery cable at battery.
2. Remove generator drive belt. Refer to 7, Cooling System for procedure.
3. Unsnap plastic insulator cap from B+ output terminal (3).
4. Remove B+ terminal mounting nut at rear of generator (2). Disconnect terminal from generator.
5. Disconnect field wire connector at rear of generator (4) by pushing on connector tab.
6. Remove 1 rear vertical generator mounting bolt (2).
7. Remove 2 front horizontal generator mounting bolts (1).
8. Remove generator from vehicle.
DR/DH
CHARGING
8F - 45
5.7L
WARNING: DISCONNECT NEGATIVE CABLE FROM
BATTERY BEFORE REMOVING BATTERY OUTPUT
WIRE (B+ WIRE) FROM GENERATOR. FAILURE TO
DO SO CAN RESULT IN INJURY OR DAMAGE TO
ELECTRICAL SYSTEM.
1. Disconnect negative battery cable at battery.
2. Remove generator drive belt. Refer to 7, Cooling
System for procedure.
3. Unsnap plastic insulator cap from B+ output termi-
nal.
4. Remove B+ terminal mounting nut at rear of gen-
erator. Disconnect terminal from generator.
5. Disconnect field wire connector at rear of generator
by pushing on connector tab.
6. Remove generator support bracket nuts (3) and
bolt (4) and remove support bracket.
7. Remove 2 generator mounting bolts (1) and (3).
8. Remove generator from vehicle.
8F - 46
CHARGING
DR/DH
5.9L Diesel
WARNING:
DISCONNECT
BOTH
NEGATIVE
CABLES
FROM
BOTH
BATTERIES
BEFORE
REMOVING BATTERY OUTPUT WIRE (B+ WIRE)
FROM GENERATOR. FAILURE TO DO SO CAN
RESULT IN INJURY OR DAMAGE TO ELECTRICAL
SYSTEM.
1. Disconnect both negative battery cables at both
batteries.
2. Remove generator drive belt. Refer to 7, Cooling
System for procedure.
3. Unsnap plastic insulator cap from B+ output termi-
nal.
4. Remove B+ terminal mounting nut at rear of gen-
erator. Disconnect terminal from generator.
5. Disconnect field wire connector at rear of generator
by pushing on connector tab.
6. Remove upper mounting bracket bolt (2).
7. Remove lower mounting bracket bolt and nut (2).
8. Remove generator from vehicle.
DR/DH
CHARGING
8F - 47
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