CHASSIS MODIFICATIONS 2-51 E UROCARGO Euro 4/5 Modification of the engine cooling system 2.10 Modification of the engine cooling system The proper functioning of the original system, especially in connection with the radiator, the free surface of the radiator and hoses (dimensions and layout) must not be tampered with. Whenever modifications must be made that entail work on the engine cooling system (e.g., modifications to the cab), the following points must be considered: - The useful area for the passage of air for the cooling of the radiator must not be less than that which is available on vehicles with the standard cab.
Maximum venting of air from the engine compartment must be ensured and care must be taken - possibly using shields or baffles - to avoid stagnant air pockets or back flow of air. The performance of the fan must not be altered. - If it is necessary to re-position the hoses this must be done without affecting the complete filling of the system (which must occur at a continuous flow without forming blockages at the mouth) or the normal flow of water. The maximum stabilising temperature of the water must not be altered even under the most severe operating conditions.
- Hoses must be located so that air pockets are not formed (i.e avoiding air traps and providing appropriate bleeding points) that could hinder the circulation of water. Check that the water pump primes immediately on starting the engine and later operates with the engine idling (accelerate a few times, if necessary) even when the circuit is not pressurized. Check that the delivery pressure of the water pump, when the engine is running under no load and at maximum RPM, is not lower than 1 bar. - Always reinstall the radiator anti-clogging protection after making alterations to the engine cooling system. Modification of the engine cooling system Print 603.93.431 Base - January 2008