ELBOW 3B9408 - Caterpillar

Care of the Fuel Supply: The importance of using only clean diesel fuel cannot be over-emphasized. Buy clean fuel and keep it clean. The best fuel can be rendered unsatisfactory by inadequate storage facilities or careless handling. Primary Fuel Filter: The use of a primary fuel filter is recommended to ensure that only clean, moisture free fuel is supplied to the engine. Refer to the truck manufacturer's or the filter manufacturer's operation instructions for additional information.Effort should be constantly expended to prevent contamination of the fuel. An important step is to reduce the number of times the fuel must be handled. When the fuel can be delivered by the distributor to storage tanks and then pumped from the storage tank to the diesel fuel tank, the handling is reduced to a minimum. Care of the Diesel Fuel Tank: Fill the diesel fuel tank at the end of the day, because the incoming fuel will drive out the moisture-laden air and prevent condensation. Draining Fuel Tank Moisture and Sediment Accumulation: Before starting the engine drain off any sediment or water which may have accumulated in the fuel tank. In temperatures below freezing, drain shortly after the truck has stopped to prevent water freezing in the bottom of the tank and other low points in the system. Fuel Filter Change: 1. Unscrew and remove filter (right hand thread). 2. Clean the filter housing base. Be sure all of old filter gasket is removed. 3. Lubricate the filter gasket with clean diesel fuel and fill the filter with clean diesel fuel. 4. Install the filter. Tighten filter by hand until gasket contacts base; then tighten 1/2 turn more.5. Prime the system. Priming Fuel System:1. Loosen the cap on the tee on top of fuel filter base. 2. Operate starter until the flow of fuel from the filter is continuous and free of bubbles.3. Tighten cap. If engine fails to start, misfires or smokes, further priming is necessary.4. Loosen each fuel line nut one at a time at the cylinder head.5. Operate the starter until the flow of fuel is free of air bubbles.6. Tighten the fuel line nut. Fuel Injection Equipment
When improper fuel injection is affecting engine operation, a systematic check should be made to determine the cause. A likely cause is dirt or water in the fuel. Drain the sediment from the fuel tank. Install new filter element if necessary. Then prime the fuel system until clean fuel reaches the fuel injectors. If the fuel system is air bound, priming the system will overcome the difficulty.If the engine is running irregularly, and smoking, a fuel injector may not be spraying the fuel properly. Testing Fuel Injectors: Whenever an engine performs in such a manner that a fuel injector is suspected or causing trouble, isolate the problem cylinder. To identify the malfunctioning cylinder; loosen the fuel injection line nut at the cylinder head, one at a time, while the engine is running.When a nut is loosened and the irregularity in