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MAIN OPERATIONS ON ENGINE MOUNTED ON VEHICLE Keep to the following instructions before doing any work on the engine involving components of the fuel supply system. - Before doing any work on the engine, perform the engine/vehicle fault diagnosis with specific IVECO diagnosis equipment and print out the results. - Replacement of the MS6.3 or EDC 16control unit must be authorized by the Help Desk. Replacing operation requires reprogramming as described in specific section. - Following components in feed system cannot be overhauled but have to be replaced: pressure relief valve, if present, fuel pressure sensor, hydraulic accumulator, complete CP1H high pressure feed pump, pressure control valve, - All the parts of the Common Rail system are packaged by the supplier in sheets of oiled paper and are stored in cardboard boxes. They must therefore be protected against moisture and unpacked just prior to assembly. - The greatest care must be taken over the cleanliness of parts, making sure that when handling or assembling (starting with straightforward filter and pre-filter replacement) no dirt of foreign bodies can get inside. For this - Take care over the direction of assembly for all electrical connections. - All threaded connections must be tightened to the prescribed torque. - All the quick-coupling connectors (on the engine they are found on the high-pressure pump and on the diesel drain manifold) must be fully inserted. To drive them out, press on the tabs at the base of the connectors. Electro-injector None of the couplings/unions/nuts on the injector body may be handled. It is neither necessary nor permitted to CP1H High-pressure pump If working on the high-pressure pipe, the hexagon on the pump side must be kept stationary with a wrench. High-pressure pipes Each high-pressure pipe must be replaced after disassembly operations. Hydraulic accumulator (rail) and accessories The pressure sensor can be assembled five consecutive times; after that, it must be replaced. They must be lubricated F1A ENGINE 7 D AILY E URO |