![]() ![]() Care should be taken to identify and return assemblies to the proper location if both overhead assemblies were removed. The outboard end of each rocker shaft assembly is marked with the DDC logo for identification. Note: Front and rear rocker shaft assemblies look identical but are not interchangeable due to different bolt-hole center distances. After locating the injector, press down on the top of the injector body with the heel of your hand to seat it in the injector tube. Visually align the injector body for equal clearance between valve springs (there is no locating dowel pin on the underside of the EUI). Insert the injector into its respective injector tube bore.Apply a thin coat of clean ethylene glycol to the injector seal rings and install them in the injector nut ring grooves.Check to make sure the injector bore is thoroughly clean.Place the auxiliary seal in the injector hole and seat it against the top of the injector tube with a 41.3 mm (1-5/8 in.) diameter wood or plastic dowel. This seal should be used in situations where injector tube seal leakage or deterioration is suspected or confirmed. Detroit Diesel encourages the use of an additional service seal (5104701) that is impervious to both coolant and fuel.Failure to replace seals can result in seal leakage. ![]() Any time an injector is removed, all three injector nut O-ring seals must be replaced with new seals. Injector seals are considered one-use items and cannot be reused.
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