TRACK AR 3503300 - Caterpillar

Engine News; October 1989; Page 3; "Fuel Injector Reference For 3500 Family Of Engines. Engine News; June 1990; Page 3; "New 7C9580 Fuel Injector (Type 2) Available To Replace 2W5201 Fuel Injector (Type 1)" for 3500 Family Of Engines.
In the past, the Remanufactured 0R0906 Injector Assembly has been changed from a Type 1 [10.7 mm (.42 in)] injector to a Type 2 [11.0 mm (.43 in)] injector. This change was made because the new component parts used in the Type 1 injector were unavailable for remanufacturing purposes. In marine propulsion applications, the Type 2 injectors have shown a tendency to surge at low idle when the engine is equipped with a UG8 Governor. For those applications, the 0R3252 Fuel Injector Assembly is available. The 0R3252 Fuel Injector Assembly is a Type 1 injector which can be used as a direct replacement for the 2W5201, 7C9580, or 0R0906 Injector Assemblies.