CARTRIDGE GP-TURBOCHARGER 7C0354 - Caterpillar

Either too much fuel for combustion or not enough fuel for combustion can be the cause of a problem in the fuel system. The source of the problem is difficult to find.When noticeable smoke rises from the exhaust, the problem can be caused by the following reasons:
a defective unit injector
not enough air for good combustion
an overload at high altitude
oil leakage into combustion chamber
altitude
air inlet and exhaust leaksNote: Refer to Troubleshooting for more information on the fuel system.Fuel System Inspection
A problem with the components that send fuel to the engine can cause low fuel pressure. This can decrease engine performance.
Illustration 1 g00550906
(1) Electronic Control Module (ECM). (2) Fuel filter. (3) The fuel gallery that is located within the fluid manifold. (4) Fuel tank. (5) Fuel transfer pump. (6) Fuel pressure regulating valve.
Check the fuel level in the fuel tank. Inspect the cap for the fuel tank. Make sure that the vent is not filled with dirt.
Clean the screen that is inside the inlet fitting of the fuel transfer pump.
Install a new fuel filter. Clean the primary fuel filter.
Remove any air that may be in the fuel system.If there is air in the fuel system, use the priming pump to open the drain valve on the fuel injection pump housing. Drain the fuel system until fuel without air flows from the drain line.Checking Engine Cylinders Separately
Low temperature at an exhaust manifold port is an indication of no fuel to the cylinder. This can possibly be an indication of an injector with a defect. An extra high temperature at an exhaust manifold port can be an indication of too much fuel to the cylinder. High temperatures may also be caused by an injector with a defect.Refer to Testing And Adjusting, "Measurement of Exhaust Temperature" for the procedure for checking the temperatures in the exhaust manifold port.Start Up Procedure
Note: Refer to Operation and Maintenance Manual, "Engine Starting" in the Operation Section.If the fuel system has been worked on, use this starting procedure to start the engine:
Disconnect the air inlet system from the turbocharger.
Be careful when placing the steel plate against the opening on the turbocharger air inlet. To avoid crushed fingers, do not position fingers between the steel plate and the opening on the turbocharger air inlet. Due to excessive suction, the plate can be forcefully pulled against the opening on the turbocharger air inlet.
Another person will need to help as a precautionary step. This person should be ready to use the steel plate to cover the turbocharger air inlet if a problem occurs.Note: Make sure that the steel plate is large enough to cover the entire turbocharger air inlet.
Start the engine.Immediately place the steel plate against the opening on the turbocharger air inlet if the engine operates in one of the following ways:
The engine runs too fast.
The engine runs out of control.Covering the opening will stop the air supply to the engine. This will cause the engine to stop.Fuel Pressure
Table 1
Tools Needed    
Part Number     Part Name     Quantity