Mercedes S-Class W-140

1991-1999 of release

Repair and car operation

Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   - Power supply system and injection of fuel of the petrol engine - the general information
      Security measures and rules of observance of purity at work with fuel system
      Sbrasyvaniye of pressure in fuel system of the petrol engine
      Check and adjustment of number of turns of the single course/the moment of ignition/concentration WITH
   + System of injection of fuel of the diesel engine - the general information
   + Control system of injection of fuel and HFM-SFI ignition (6-cylinder petrol engines)
   + Control systems of the LH-SFI and ME-SFI engine (8-cylinder petrol engines)
   + Control systems of injection of fuel and ME-SFI and LH-SFI ignition (12-cylinder petrol engines)
   + Control system of fuel injection (diesel engines of the Om603.971 series)
   + Control system of fuel injection (diesel engines of the Om606.961 series)
   + turbo-supercharging System - the general information
   Systems of decrease in toxicity of release - the general information
   System of production of the fulfilled gases - the general information
   Catalytic converter (petrol models)
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Sbrasyvaniye of pressure in fuel system of the petrol engine

Before starting to work, familiarize with the precautionary measures given in the Section of the Security measure and a rule of observance of purity at work with fuel system

After performance described below procedure you only remove superfluous pressure from fuel system. In pipelines there will be a gasoline. Before disconnecting any fuel hose, accept all necessary precautionary measures.

The fuel system considered in this Chapter, consists of the fuel tank located in it of the fuel pump with the sensor of a stock of fuel, the fuel filter, nozzles, a regulator of pressure and various hoses and tubes. In all these knots in engine operating time (and also at the included ignition) fuel is under pressure.

After ignition switching off pressure in system remains still quite long time. Before a detachment of any of mentioned above components pressure is necessary for dumping.

The simplest way of dumping of pressure is following. Take a safety lock of the fuel pump and start the engine. If the engine is not started, turn it a starter within several seconds and if it will be started, wait its spontaneous останова. Completely to dump pressure, turn the engine crankshaft a starter on pair of turns. Switch off ignition and return into place a pump safety lock.

The valve of dumping of the pressure, located works at the fuel distributive highway by a principle of a simple nipple. Place rags round the valve, remove a cap and press on a nipple. After completion of work do not forget to return a cap into place.

Keep in mind that if pressure is dumped (or from system is removed fuel), start of the engine will borrow bigger, than usually, time. You should turn the engine crankshaft a starter at least some seconds during which pressure in system will be restored, and fuel will fill all pipelines.