44 RENR5042-02 Troubleshooting Section i01405833 Fuel in Cooling System Leaking Seals on the Fuel Line Adapter for the Cylinder Head SMCS Code: 1350-035 Look for signs of damage to the seals on the fuel line adapter for the cylinder head. Repair any leaking fuel lines or components and/or replace any leaking fuel lines or components. Probable Causes Internal cylinder head Excessive Leakage from the Unit Injector Tip or Breakage of the Unit Injector Tip Recommended Actions Look for signs of damage to the unit injectors. If necessary, repair the unit injectors or replace the unit injectors. Internal Cylinder Head 1. Remove the valve mechanism covers. 2.
Remove the fuel supply and the fuel return line from the cylinder head. Cracked Fuel Supply Manifold Look for signs of damage to the fuel supply manifold. 3. Cap the fuel return connector and apply 700 kPa (100 psi) maximum air pressure to the fuel supply connector. Check for fuel leakage around the unit injectors. If leakage is present, remove the unit injector and install a new O-ring seal. Leaking Fuel Transfer Pump Seal Ensure that the weep hole is not plugged. If necessary, repair the fuel transfer pump or replace the fuel transfer pump. i02119587 Fuel Dilution of Engine Oil i02290607 Intermittent Engine Shutdown SMCS Code: 1348-035 SMCS Code: 1000-035 Probable Causes Note:
Use this procedure only if the engine shut down completely and it was necessary to restart the engine. Leaking seals on the case of the unit injector or on the barrel of the unit injector Probable Causes Leaking seals on the fuel line adapter for the cylinder head Excessive leakage from the unit injector tip or breakage of the unit injector tip Diagnostic codes or event codes Selected engine rating parameters Cracked fuel supply manifold Electrical connections Leaking seal on the fuel transfer pump Faulty remote shutdown Recommended Actions Circuit breakers Fuel supply Leaking Seals on the Case of the Unit Injector or on the Barrel of the Unit Injector Faulty overspeed verify switch Note:
If the problem only occurs under certain conditions such as high engine speed, full load or engine operating temperature, then perform the test under those operating conditions. Look for signs of damage to the seals for the unit injectors. Replace any seals that are leaking.