The D.C. Generator uses a negative ground system. Output is controlled by a regulator which is connected between the generator armature and the field. The field is grounded internally.
The armature shaft is supported on both ends by permanently lubricated ball bearings which fit into the end plates.
D.C. GENERATOR TEST, ON THE CAR
See Figures 1 and 2
- Disconnect regulator armature and field wires at the generator.
- Connect a jumper wire from the generator armature terminal to the generator field terminal and the positive lead of a 0-50 ammeter to the generator armature terminal.
- Start engine and while it is idling, connect the ammeter negative lead to the positive terminal of the battery.
- Run engine at 1,500 R.P.M. and read the current output on the ammeter. Generator output should reach or exceed 30 amperes.
Disconnect test leads as soon as test is completed to prevent overheating the generator. Then stop the engine.
REMOVAL & INSTALLATION
- Disconnect all wires from generator.
- Remove generator attaching bolts, then remove the generator.
- Clean mating surfaces of generator frame and mounting bracket.
- Install generator in the mounting bracket with the two pivot bolts and lock washers.
- Install the generator belt, and the adjustment arm to generator bolt. Adjust the belt tension and tighten all bolts securely.
- Connect the armature, field, and ground leads to the generator terminals.
- Start the engine and check generator operation.
POLARIZING THE D.C. GENERATOR
To polarize a DC generator on the car, disconnect the field wire and the battery wire from the regulator. With the engine turned OFF, momentarily connect the two wires together.
Do not polarize a generator by any method that applies battery voltage to the field terminal of the regulator, such as shorting from the battery terminal to the field terminal of the regulator. Connecting a jumper wire directly from the battery to the generator field terminal is also taboo. The above practice will cause regulator damage.