Page 349 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Components of CRDI System

1 Fuel injection pump - pressurizes fuel to high pressure
2 High-pressure pipe - sends fuel to the injection nozzle
3 Injection nozzle - injects the fuel into the cylinder
4 Feed pump - sucks fuel from the fuel tank

5 Fuel filter - filtrates the fuel
6 Engine control unit (ECU)

Precautions to be observed before removing the CRDI Fuel system

Before removing a CRDI fuel supply system, several precautions should be followed to ensure safety and prevent
damage:
1 Disconnect the Battery: Ensure the vehicle’s battery is disconnected to prevent any electrical mishaps during
the removal process.
2 Depressurize the Fuel System: Relieve pressure from the fuel system by following the manufacturer’s
recommended procedure. This typically involves removing the fuel pump relay or fuse and then running the
engine until it stalls.
3 Ensure Proper Ventilation: Work in a well-ventilated area to avoid inhaling fuel vapors, which can be harmful
to health.
4 Wear Personal Protective Equipment (PPE): Use appropriate PPE such as gloves and safety glasses to
protect yourself from fuel and other contaminants.

5 Handle Fuel Carefully: Handle fuel components with care to avoid spills and leaks. Have a container ready
to catch any fuel that may leak during the removal process.
6 Use Proper Tools: Use the correct tools and equipment specified by the manufacturer to avoid damaging
components or causing injury.
7 Follow Manufacturer’s Instructions: Always refer to the vehicle manufacturer’s service manual for specific
instructions and precautions related to the removal of the fuel supply system.

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CITS : Automotive - Mechanic Diesel - Lesson 108 - 113