Mercedes W124

since 1985-1995 of release

Repair and car operation

W124 Mercedes
+ Governing bodies and control devices
+ 2. Maintenance (diesel engines)
+ 4. Repair of 6-cylinder petrol SOHC engines
+ 5. Repair of 6-cylinder petrol DOHC engines
+ 6. Repair of the diesel engine established in the car
+ 7. Major maintenance of engines
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
- 11. System of injection of BOSCH HFM fuel
   11.2. General information
   11.3. Accelerator cable
   11.4. Air filter
   11.5. Casing of the air filter
   11.6. Fuel filter
   11.7. Fuel level sensor
   11.8. Fuel pump
   11.9. Fuel tank
   11.10. Throttle case
   11.11. Inlet collector
   + 11.12. Elements of system of injection of BOSCH HFM fuel
   11.13. Pressure removal in fuel system
   11.14. Adjustment of turns of idling and the contents WITH in exhaust gases
+ 12. Fuel system of diesel engines
+ 13. Fuel system of diesel engines
+ 15. System of ignition of 4-cylinder petrol engines
+ 16. System of ignition of four-cylinder petrol engines
+ 19. Mechanical transmission
+ 20. Automatic transmission

11.13. Pressure removal in fuel system



Gasoline extremely fire - also is explosive, therefore it is necessary to show care at work on any part of fuel system.

Works on fuel system are necessary for making in well aired room for what it is possible to open all windows and doors for draft creation.

At work on fuel system do not use open fire, electric welding and tools, at work with which sparks can be formed. Check that in close proximity to a workplace there is a charged fire extinguisher.

For protection of eyes against fuel hit in them use points. At fuel hit on skin wash out this place a plentiful quantity of water.

The capacity in which there was a fuel, contains pairs of fuel and is potentially explosive.

At work with fuel system observe purity as the dirt which has got to channels of fuel system, can block them that will break normal operation of the engine.

The fuel system consists of the fuel pump, the accumulator of pressure, the fuel filter, fuel nozzles, a regulator of pressure, the distributor of fuel and топливопроводов.

At operation of the engine or after ignition inclusion fuel is in fuel system under constant pressure. at work on fuel system it is necessary to remove previously pressure in system. Work on pressure removal in fuel system is desirable for making on the cold engine.

To remove pressure in fuel system it is possible, using the additional valve located in an end face of the fuel highway. For performance of this operation use of the special equipment having a hose of supply of fuel under pressure with adapters is necessary. In the absence of the special equipment for pressure removal in fuel system it is possible to use the alternative method stated below.

Take the relay of the fuel pump, then start the engine in an idling mode to its stop. Because the engine consumes fuel, and the fuel pump does not pump up fuel in fuel system, pressure in fuel system considerably decreases.

Remove a weight wire from the accumulator. Uncover a toplivozalivny mouth to level pressure in a fuel tank with the atmospheric. Establish a cover of a toplivozalivny mouth into place.

Establish the container under any connection топливопровода and prepare rags which will absorb the spread fuel.

Being careful, slowly weaken connection топливопровода. Close connection топливопровода pure rags in order that fuel was not sprayed in the parties. After pressure removal in fuel system completely unscrew топливопровод and close its ends jams.