23.6. Diagnostics of malfunctions of the generator

Cause of defect

Elimination method

The arrow of the voltmeter does not deviate from the left (red) sector at the working engine

The generator belt is badly tense or torn off

Tighten or replace a belt

Tension regulator is damaged. For check use two sources of a direct current of 12 and 15 V (see. "Electric equipment") or replace the regulator obviously serviceable

Replace the faulty regulator

The chain "the block of safety locks — a conclusion "61" (or "Ш") the generator" is faulty

Check a wire from the block of safety locks to a conclusion "61" (or "Ш") the generator. Smooth out the oxidized contacts, press out plugs

Brushes hanged or are worn out, contact rings of a rotor are oxidized, the generator gives the put tension only on high turns at small current of return. The winding of excitement of a rotor is not damaged - resistance between contact rings about 4 Ohms (it is measured after a regulator detachment with brush knot)

Smooth out contact rings a glass skin, check lack of a beating. Eliminate lag of brushes, at their wear replace the brush holder, smooth out, turn in tension regulator conclusions

Detachment of conclusions of a winding of excitement from contact rings, short circuit or break in a winding (the generator gives the put tension only on high turns at small current of return). Resistance between contact rings less than 3 Ohms or infinity (it is measured after a regulator detachment with brush knot)

Solder conclusions or replace a rotor of the generator or the generator assembled

Break or short circuit in a stator winding, its short circuit on "weight" (the generator "howls")

Check an ohmmeter a winding. Replace the stator or the generator assembled

Damage of the main gates of the vypryamitelny block

Replace the vypryamitelny block

Damage of additional gates of the vypryamitelny block of the generator 37.3701, at the same time the generator gives the put tension only on high turns at small current of return. Gates are checked by an ohmmeter after dismantling of the generator

The damaged gates or replace with Perepayayte the vypryamitelny block

The arrow of the voltmeter is in the white sector, but the rechargeable battery is charged insufficiently (the bent shaft of the engine at start-up is hardly turned). Tension in onboard network lower than 13,6 In

The generator belt is badly tense

Tighten a belt

Too many powerful consumers of the electric power are included, especially at low turns of the engine. Short circuit in consumers (usually it is windings of electric motors)

Limit use of powerful consumers idling, do not connect additional consumers over the admissible power of the generator, check windings of electric motors for lack of short circuit

Fastening weakened or tips of wires on a positive conclusion of the generator or rechargeable battery are oxidized

Smooth out plugs and tips, tighten connections

The arrow of the voltmeter deviates to the yellow sector during the operation of the engine. The rechargeable battery is recharged, electrolyte level quickly goes down, lamps often fuse. Tension in onboard network of the car higher than 14,7 In

Tension regulator is faulty

Replace the regulator

Bad contact between "mass" of the car and "mass" of the regulator of tension

Smooth out the oxidized surfaces, tighten fastenings

The arrow of the voltmeter does not deviate at inclusion of ignition

The safety lock fused

Replace a safety lock, remove the cause of its burn-out (check the protected chains an ohmmeter)

Break in a power-supply circuit of a combination of devices

Check operation of the switch of ignition, the relay of ignition, connection of a combination of devices, including with "weight". Smooth out contact surfaces, press out plugs. Replace the faulty switch of ignition or its contact part

The voltmeter in a combination of devices is damaged

Replace a combination having tidied up

Noise of the generator

Generator bearings (squeal, howl), wear of a seat in a generator cover are damaged. (Noise remains at disconnection of wires from the generator, but disappears if to take off a belt of its drive and to launch for a while the engine)

Replace bearings or the generator assembled

The rotor touches stator poles

Check a rotor shaft beating, wear of bearings and seats. Replace faulty details or the generator assembled

Fastening of a pulley of the generator weakened

Tighten a fastening nut

Short circuit in a stator winding, its short circuit on "weight" (the generator "howls"). Noise disappears if to disconnect wires from the generator

Replace the stator or the generator assembled

Short circuit in one of the main gates. Noise disappears if to disconnect wires from the generator

Replace the vypryamitelny block

Scratch of brushes

Slightly smooth out contact rings a glass skin, wipe with gasoline, check lack of a beating. Make sure that brushes freely and without distortions move in the brush holder