Noise from a generator may be caused by any of the following:
| • | A loose drive pulley |
| • | Loose mounting bolts |
| • | Worn or dirty bearings |
| • | A defective diode |
| • | A worn stator |
A high frequency whine or magnetic noise may be heard at full output. This is a normal condition. Perform a generator output test in order to help distinguish bearing noise from magnetic noise or whine. Refer to Generator Electrical Test.
A growling noise under a high load condition could indicate a shorted bridge diode. A generator with a shorted diode will also have a reduced output. Perform a generator output test. Refer to Generator Electrical Test
It is also helpful to listen to the generator under a moderate load (i.e. headlights ON) in order to determine if there is a bearing or magnetic noise.
Do not disassemble the CS 130D generator. Generator service is limited to replacement only. Refer to Generator Replacement .
