1. To disconnect or connect the power wire to the fuel injection pump or preheating device, turn off the ignition.
2. Disconnect the battery only after the ignition is turned off. Please remember that disconnecting the battery will delete any security code that may be installed on your radio.
3. Before starting work on the power supply system, ensure that the work area is clean. If these works are carried out outdoors, then this is only possible in windless weather to prevent dust from getting onto the parts of the power supply system.
4. Clean all union nuts before unscrewing them.
5. Place all removed parts on a workbench or other surface and cover with paper or plastic wrap. Do not use lint-containing cloths.
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6. If the installation of the removed parts will only take place after a certain period of time, these parts should be covered properly or placed in closed boxes or crates.
7. Before installing the parts, make sure they are not contaminated again.
8. Do not use compressed air to clean parts if the fuel injection system is opened.
9. Do not wash the engine with the fuel injection system open.
10. Do not move the vehicle if the fuel injection system is removed.
11. Be careful not to let diesel fuel come into contact with the cooling system hoses. If fuel gets on the hose, it must be immediately wiped off with a rag. Hoses that have been exposed to diesel fuel must be replaced.
The high-pressure fuel pump cannot be repaired or overhauled and, in the event of a malfunction, is replaced as a set with an identical one from the workshop's exchange stock or with a new one.
To regulate the fuel injection of the high-pressure fuel pump, as well as to remove and install it, special tools are required. Adjustment of the fuel injection pump can only be performed in a workshop with the necessary equipment. In addition, adjusting the fuel injection pump also requires experience. If you are removing the fuel injection pump yourself, it is recommended that you follow the instructions on the procedure for replacing the timing belt so that the fuel injection pump can be released and removed.