MAZ car generators

The following generator sets (GU) are installed on MAZ vehicles with engines from the Yaroslavl Motor Plant (YaMZ): G273V1 - for 45 A, 1312.3771 - for 50 A, 6582.3701 - for 80 A and 3112.3771 - for 80 A

It is possible to install a generator 3232.3771, the distinguishing feature of which is the absence of an excitation terminal.

Self-excitation of the generator occurs at a rotor speed of no more than 1200 min.

Specifications, device and maintenance features of the generator 3232.3771 are given below.

See the table for generator set specifications.

1. During operation, in order to avoid damage to the generator set, it is prohibited:

• a) disconnecting the wire from the positive terminal of the generator or disconnecting the battery with the "mass" switch when the generator is running;
• b) checking the health of the generator set by closing the terminals "+", "B" and "O", "D" with jumpers to the "ground" and to each other;
• c) check the health of the electrical circuit and individual wires with a megohmmeter or a light bulb powered by a voltage above 26 V.
• 2. When installing batteries on a car and connecting them, it is necessary to strictly observe the polarity (“+” to the circuit, “-” to “ground”).
• 3. Check the tension of the drive belt, the reliability of connecting the wires to the generator set with the engine off and the batteries disconnected.
• 4. When washing the vehicle, avoid direct water contact with the generator set.

Scheme for connecting the G273V1 generator set to the vehicle's on-board network (Fig. 1)

All generating sets consist of self-excited synchronous generators, rectifier units and voltage regulators.

The excitation winding (0 V) of the G273V1 generator is powered from the zero point of the stator winding with a voltage of 14 V.

To improve excitation, a feed resistance is included in the OB circuit. OB generators 1312.3771; 3112.3771; 6582.3701, powered by additional 28 V diodes.

Generators with additional diodes have a battery charge indicator lamp, which indicates the health and operation of the generator set.

When the starter and instrument switch is turned on, the lamp lights up when the GU is working.

When the engine starts and the generator is energized, the lamp goes out.

Scheme of switching on the generator set 6582.3701 (Fig. 2)

On vehicles equipped with an electric torch device (EFD) to facilitate starting a cold engine, the generator is blocked (the power to the voltage regulator is turned off).

This is necessary in order not to disable the EFU candles, because after the generator is excited, the voltage in the vehicle's on-board network will be at least 28 V, and the EFU system is designed for a voltage of 24 V.

Scheme of switching on the generator set 1312.3771; 3112.3771 (Fig. 3)

All generator sets have a phase output for connecting a tachometer.

The voltage regulators of G273V 1 and 6582.3701 generator sets have seasonal adjustment.

When the outdoor temperature is 0˚ and above, the seasonal adjustment switch (SPR) must be in the “Summer” (L) position, the seasonal adjustment screw is turned out to the stop.

When the outside temperature is below 0 °C, the commissioning work must be in the "Winter" position - the screw is screwed in as far as it will go.

The voltage regulators of generator sets 1312.3771 and 3112.3771 do not have seasonal adjustment, but have temperature compensation.

Generator set specifications