LEVER 3B2421 - Caterpillar

As Viewed From Front Of Engine.(1) Cylinder head.(2) Tube assembly (fuel return to tank).(3) Tube assembly (fuel transfer pump to fuel filter).(4) Check valve assembly (maintains minimum fuel system pressure). Minimum at low idle ... 50 kPa (7.2 psi) Refer to the Testing and Adjusting Section of the Service Manual, for the procedure to check the fuel pressure.(5) Fuel outlet port. Tighten fuel outlet port to a torque of ... 5 2 N m (45 18 lb in)(6) Screen assembly.(7) Fuel inlet port. Tighten fuel inlet port to a torque of ... 5 2 N m (45 18 lb in) The fuel inlet port is on the priming pump for engines equipped with fuel priming pumps.(8) Fuel gallery.(9) Pressure regulating orifice Maintains fuel system pressure as follows:Maximum at rated rpm ... 400 kPa (58 psi)Minimum at rated rpm ... 200 kPa (29 psi) The pressure regulating orfice is a drilled passage in tube assembly (2).(10) Relief valve.