Check whether the accessory drive belt is broken. If the belt is intact, check its tension

Press the top of the belt with your thumb and see how much it bends

If the deflection does not correspond to the norm, adjust its tension or replace the belt, see the article - “How to replace drive belts

GAZ-2705 generator malfunctions

If the belt is tensioned normally, check to see if the 90 A fuse link in the fuse block located in the engine compartment next to the battery has burnt out.

This fuse link (shown by an arrow in the photo, the cover of the fuse block is removed) protects, among other circuits, the generator circuit.

If the fuse link is burnt out, replace it and start the engine.

If the voltage reading on the display is no longer blinking (the voltmeter needle is in the green zone of the scale, the low battery warning light has gone out), then the voltage is normal and you can continue driving.

Possible generator malfunctions and solutions

When the engine is running at medium speed, the voltage indicator shows below 12 V:

- Voltage regulator is faulty

Replace the voltage regulator

- The drive belt is loose

Tighten the belt

- Broken wires from terminals <+> or <Ш>

Repair the wires

- No or poor contact between brushes and slip rings

Clean the brush holder from dirt, check the force of the brush springs, clean or sharpen the contact rings

- Open circuit excitation

Eliminate the open circuit, especially carefully check the soldering points of the excitation coil leads to the slip rings and the serviceability of the coil leads

- Interturn short circuit or open circuit in the circuit of one of the phases of the stator winding of the generator

Disassemble the generator, check the stator winding for open circuits and short circuits

Replace the stator with a faulty winding

- Failure of one of the diodes of the rectifier unit

Check the diodes using instruments or a test lamp

Replace the block with faulty diodes

Look at the articles: - “Generator 1631.3701 for GAZ-2705” and “Generator 9422.3701

Rapid wear of brushes and slip rings:

- Increased slip ring runout

Sharpen and grind the slip rings

- Oil on contact rings

Wipe the slip rings and brushes with a cloth soaked in gasoline

- Increased or decreased pressure of brush springs

Check brush spring pressure

Increased generator noise:

- Insufficient amount of lubrication in bearings

Replace bearings

- The rotor touching the starter poles

Replace the generator cover

- Bearing wear

Replace bearings

- Seized bearings

Replace bearings

- Development of a seat for the bearing

Replace the generator cover

- The tension screws of the generator covers are loose

Tighten the coupling screws to a torque of 0.5 kgf.m

Failure of the bracket and mounting arms of the generator. Frequent loosening of the generator:

- Incorrect installation of the generator on the brackets

Install generator

- Increased pulley or rotor imbalance

Check the dynamic balancing of the pulley and rotor.

If the imbalance exceeds 10 gfm, balance the parts

- Increased engine imbalance

Check engine dynamic balancing

Also see the article - “How to check the generator on a car