BEARING 4V3743 - Caterpillar

Reference: Service Magazine; October 2, 1989; Page 10; "Fuel Injector Reference for 3500 Family Of Engines" for 3500 Family Of Engines; D11N, 776B Tractors, 777B, 785, 789 Trucks.Service Magazine; June 11, 1990; Page 10; "New 7C9580 Fuel Injector (Type 2) Available To Replace 2W5201 Fuel Injector (Type 1)" for 3500 Family Of Engines; D11N, 776B Tractors,; 777B, 785, 789 Trucks.
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.