BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply system and release
- Engine electric equipment
   + System of ignition
   + System of preheat of the diesel engine
   - Systems of a charge and start
      Removal and installation of the rechargeable battery
      The low-served rechargeable battery
      Check of the rechargeable battery
      Self-discharge of the rechargeable battery
      Charging of the rechargeable battery
      The generator - general information
      Security measures during the work with the generator
      Check of tension of charging of the generator
      Removal and installation of the generator
      Check and replacement of brushes of the generator and regulator of tension
      Removal and installation of a starter
      Removal, check and installation of the electromagnetic traction relay
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics



General information

The small electric motor - a starter is necessary for start of the internal combustion engine. That the engine was started, it is necessary to untwist it a starter to 300 rpm. It is possible only during the reliable work of a starter and sufficient degree of a charge of the rechargeable battery.

The starter consists of a driving part, polar and collector. In a polar and collector part there are an anchor and a collector, and also the brush holder. In the brush holder there are brushes which with confluence of time wear out. At big wear of brushes reliability of work of a starter decreases.

In a forward part of the case of a starter the drive gear wheel is placed. If via the ignition switch on a starter tension, then the electromagnetic relay located on the starter case moves enters into gearing with a gear wreath of a flywheel of the engine the gear wheel sitting on a starter shaft. After that the starter can untwist the engine on necessary speed. After start of the engine the number of its turns exceeds starter speed. The starter leaves gearing with the engine.

Start of the engine requires big current. Therefore when carrying out maintenance it is necessary to pay attention to reliable connection of cables. The available corrosion needs to be smoothed out, and contacts need to be greased with protective lubricant.

The starter can be on sale as a replaceable part. It means that at acquisition of a new starter the cost of old can be reckoned.

1 — a casing
2 — the brush holder
3 — a set of brushes
4 — the plug
5 — a casing

6 — an excitement winding
7 — the electromagnetic relay
8 — the plug
9 — a forward cover
10 — a restrictive ring

11 — the plug
12 — the lever
13 — a gear wheel
14 — an anchor
15 — a casing