Cause | Elimination Method |
The voltmeter needle is in the red zone at the beginning of the scale | |
Alternator drive belt slip | Adjust belt tension |
Break in the power supply circuit of the excitation winding | Restore connections |
* Open in the voltage supply circuit from the output "30" to plug "15" generator | Repair connections, check fuse "10" |
Damaged alternator voltage regulator | Replace Regulator |
* Short circuit between the screw of the brush holder and the brush bus attached to the output "IN"regulator | Repair the short or replace the plastic base of the brush holder |
Wear or freezing of the generator brushes, oxidation of slip rings | Replace the brush holder with brushes, wipe the rings with a cloth soaked in gasoline |
Open or short to ground of the generator excitation winding | Replace Rotor |
Short circuit or break in one or more diodes of the rectifier unit | Replace alternator rectifier |
Open or interturn short circuit in the stator winding | Replace stator |
** Open or short circuit in additional rectifier diodes | Replace damaged diodes or rectifier unit |
The control lamp does not light up. The voltmeter needle is in the red zone at the beginning of the scale ** | |
Control lamp burnt out | Replace lamp |
Open circuit between output "30" and plug "61" generator | Repair connections, check fuse "10" |
No contact between pins "IN" And "W" voltage regulator and brush leads (for generators produced before 1996) | Strip the findings "IN" And "W" voltage regulator and brush leads, bend the regulator leads |
Disconnected wire from outlet "IN" brush holder | Connect wire |
The voltmeter needle is in the red zone at the end of the scale | |
Damaged voltage regulator (short circuit between output "W" and weight) | Replace voltage regulator |
* Short circuit between the screw of the brush holder and the brush bus attached to the output "W" regulator | Repair the short or replace the plastic base of the brush holder |
Increased generator noise | |
Loose alternator pulley nut | tighten the nut |
Damaged alternator bearings | Replace bearings |
Interturn short circuit of the stator winding (howling generator) | Replace stator |
Squeaky brushes | Wipe the brushes and slip rings with a cotton cloth soaked in gasoline |
* Malfunctions only for the G-222 generator.
** Faults only for generator 37. 3701. Other faults are common to both generators.