Mercedes W124

since 1985-1995 of release

Repair and car operation



W124 Mercedes
+ Governing bodies and control devices
+ MAINTENANCE
+ 2. Maintenance (diesel engines)
+ ENGINE
+ 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
+ COOLING SYSTEM
+ FUEL SYSTEM
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
+ 11. System of injection of BOSCH HFM fuel
- 12. Fuel system of diesel engines
   12.2. General information
   12.3. Air filter
   12.4. Fuel level sensor
   12.5. Fuel tank
   12.6. Inlet collector
   12.7. Accelerator cable
   12.8. Fuel pump of a high pressure
   12.9. The pumping-up fuel pump
   12.10. Mechanism of adjustment of the moment of injection, asterisk of the fuel pump
   12.11. Moment of injection of the fuel pump of a high pressure
   12.12. Fuel nozzles
   12.13. Electronic control system of turns of idling (ELR)
   12.14. Electronic anti-detonation system ARA
   12.15. Electronic control system of the diesel engine
   12.16. System of protection of the engine from an overload
   12.17. Fuel thermostat
+ 13. Fuel system of diesel engines
+ SYSTEMS OF START, IGNITION
+ 15. System of ignition of 4-cylinder petrol engines
+ 16. System of ignition of four-cylinder petrol engines
+ PRESTARTING HEATING
+ TRANSMISSION
+ 19. Mechanical transmission
+ 20. Automatic transmission
+ POWER SHAFTS
+ BRAKE SYSTEM
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS






12.11. Moment of injection of the fuel pump of a high pressure

GENERAL INFORMATION

In order that the fuel pump submitted fuel to each cylinder during the demanded moment of time, it is necessary to check and, if necessary, to adjust the moment of injection of fuel if the fuel pump of a high pressure or other connected elements acted in film.

For adjustment the moments of injection of fuel on the fuel pump of a high pressure there is the adjusting opening closed by a carving stopper. Fuel injection in the first cylinder occurs, when the ledge on the regulator case in the fuel pump passes about an adjusting opening.

When the adjusting ledge on the case of a regulator is precisely combined with the center of an adjusting opening, it is necessary to check the provision of a cranked shaft, using the index on a cover of a driving chain and a label on a quencher of krutilny fluctuations of a cranked shaft. In this provision of a cranked shaft and the fuel pump of a high pressure the indirect beginning of injection of fuel is provided.

More exact measurement of the beginning of injection of fuel is made by means of the special equipment and the sensor which is screwed in in an adjusting opening of the fuel pump. As this equipment is available only for dealers of Mercedes-Benz and Bosch, the alternative method further is described. It should be noted that the alternative method provides only approximate installation allowing start of the engine and, at the first possibility adjustment is necessary for making at service station.

Check

PERFORMANCE ORDER
1. Remove a weight wire from the accumulator.
2. Remove the fan of a radiator and a casing.
3. Unscrew a stopper of an adjusting opening sideways the fuel pump of a high pressure.
4. Using a small mirror, through an adjusting opening watch position of the case of a regulator.
5. Turn a cranked shaft of the engine in the working direction until the adjusting ledge on the case of a regulator will not be combined with the center of an adjusting opening (see fig. Use of the special tool for fixing of the case of a regulator from a provorachivaniye).
6. On a label on a quencher of the krutilny fluctuations, combined with the index, define a corner of installation of a cranked shaft (see fig. Installation of the piston of the first cylinder in situation 15 °).
7. Check the received value with technical characteristics and, if necessary, make adjustment.

Adjustment

Arrangement of the adjusting screw of the moment of injection of fuel



PERFORMANCE ORDER
1. Turning a cranked shaft of the engine, establish the engine in the provision of the moment of injection of fuel.
2. Weaken three bolts, fixing a forward part of the fuel pump to a fixing flange. Also weaken a bolt of fastening of a back part of the fuel pump to an arm.
3. Unscrew a stopper from the adjusting opening, located sideways the fuel pump.
4. Using a small mirror, through an adjusting opening watch the regulator case. Rotating the adjusting screw located sideways of the fuel pump of a high pressure, combine a ledge on the regulator case with the center of an adjusting opening (see fig. Arrangement of the adjusting screw of the moment of injection of fuel).
Prevention

At rotation of the adjusting screw to the right the moment of an advancing of injection decreases, and at turn to the left increases.


5. After carrying out adjustment tighten all bolts of fastening of the fuel pump of a high pressure the demanded moment.
6. Screw up a stopper in an adjusting opening and tighten it the demanded moment.
7. This method provides only approximate installation of the moment of injection of fuel and at the first opportunity it is necessary to make adjustment at service station.