Generator characteristics
* The BMW alternator has the same characteristics «520» with automatic transmission from chassis no. 3 800 337
From model year 1978 on BMW «525» And «528» instead of the generator with catalog number 0 120 489 610, a generator with catalog number 0 120 489 650 is installed, the maximum rotor speed of which is 15,000 rpm.
On car models «528i» a Bosch generator was installed, catalog number 0 120 489 621, with a built-in voltage regulator and the following characteristics:
- rated voltage, V: 14;
- maximum recoil current, A: 65;
- maximum power at 14 V and maximum output current, W: 910;
- rotor speed at the start of charging current to the battery, rpm: 1060.
Drive belts for these generators are V-belts, small width, size 12.5x606 LA.
Since model year 1978, the following brands of noise suppression capacitors have been installed:
- «525»: Vegi 0 310 024 015;
- «528»: Bosch 0 290 800 036;
- «528i»: Bremicker 4066.
Control voltage, V:
- Vega and Bosch: 150;
- Bremicker: 200±20.
Capacity, microfarad:
- Beru: 2,2;
- Bosch and Bremicker: 2.2±20%.
Since the 1980 model year, Bosch alternators with a built-in voltage regulator have been installed on all models.
Generator Specifications
From model year 1982 on BMW «520i» a generator with catalog number 0 120 489 718 was installed, on «525i» And «528i» — № 0 120 489 029.
- Rated voltage, V: 14.
- Maximum recoil current, A: 65.
- Maximum power, W: 910.
- Maximum rotor speed, rpm: 15000.
- The capacity of the noise suppression capacitor, microfarad: 2.2±20%.
Alternator drive belt
The generator is driven by a V-belt brand Ventiflex 1108 (9,5x875) on «518», «520»; brands Ventifiex 1112 (9,5x975) on the model «520i»; brand Aatbelt 2212 DA (12,5x1060) on «525», «528».
From model year 1980 on BMW «520» a belt with dimensions of 9.5x950 was used.
Voltage regulator («525», «528»)
Brand: Bosch AD 1/14 V.
Rated voltage. AT 12.
Operating voltage, V: 14.
Recoil current A / at rotor speed, rpm: 35/2700.
Limits of adjustable voltage at 20°C, V: 13.5-14.2.
Maximum excitation current, A: 3.
From model year 1978 on BMW «525», «528» And «528i» a Bosch brand voltage regulator built into the generator was installed, catalog number 0 192 052 004, type EE 14 V 3.
Adjustable voltage, V: 14.1.
Limits of regulated voltage, V: 13.7-14.5.
Since model year 1980, the limits of regulated voltage at a speed of 2000 rpm on cars of all models, V: 13.5-14.6.
From model year 1982 on BMW «520i» a Bosch voltage regulator was installed, catalog number 0 192 052 006, and on «525i» And «528i» - regulator with catalog number 1 197 311 004, the limits of the regulated voltage of which remained the same.