HEATER AR-SCREED 2510766 - Caterpillar

Either too much fuel for combustion or not enough fuel for combustion can be the cause of a problem in the fuel system.When noticeable smoke rises from the exhaust, this problem can be caused by a faulty unit injector. This unusual smoke can also be caused by one or more of the reasons that follow:
Not enough air for good combustion
Oil leakage into combustion chamber
Not enough compressionFuel System Inspection
A problem with the components that send fuel to the engine can cause low fuel pressure. This can decrease engine performance.
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.
Check the fuel lines for fuel leakage. Make sure that none of the fuel lines have a restriction or a faulty bend.
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.Fuel Transfer Pump
When the engine is operating at full load speed, the fuel transfer pump receives fuel from the primary fuel filter. Fuel flows through the ECM and flows through the secondary fuel filters to the fuel injection pump.Use the following steps to check the fuel transfer pump pressure.
Disconnect the fuel line from the filter at the fuel injection pump housing inlet.
Install a tee at the inlet.
Connect the fuel line to the tee.
Connect a pressure gauge to the tee.
Start the engine.
Fuel is delivered to the fuel pump housing at approximately 414 kPa (60 psi) at full load speed.If the fuel pressure is not to specifications, stop the engine. Replace the primary fuel filter and replace the secondary fuel filters. Make sure that the fuel lines and the hoses are not plugged or damaged.Start the engine and check the fuel pressure. If the fuel pressure is not at specifications, repair the fuel transfer pump or replace the fuel transfer pump.Checking Engine Cylinders Separately
If any of the following conditions occur, check the individual engine cylinders:
The engine runs rough.
The engine misfires.
The exhaust system blows out black smoke.Use this procedure to check the engine cylinders separately:
Run the engine at the roughest speed.
Loosen the fuel line nut at a fuel injection pump. This will stop the flow of fuel to that engine cylinder.After you shut off an engine cylinder's fuel flow, the engine should run more roughly.
Tighten the fuel line nut.
Repeat this maneuver with each engine cylinder in sequence until you discover a loosened fuel line that does NOT affect the engine's performance.
When you find the engine cylinder that does NOT affect the engine's performance, perform the following operations:
Test the fuel injection pump.
Test the fuel injection valve.When an engine runs at low idle rpm, the temperature of an exhaust manifold can also indicate the condition of a fuel injection valve. A low temperature indicates that no fuel is