HEAD AS-CYL 5400594 - Caterpillar

Inspect the Lines and the Clamps
The fuel lines and the clamps must be inspected periodically to ensure safe operation and continuous operation of the engine fuel system. Take proper safety precautions before inspecting or replacing fuel lines and clamps.Note: Always use a board or cardboard when the engine components are checked for leaks. Leaking fluid that is under pressure can cause serious injury or possible death. This proceeding includes leaks that are the size of a pin hole. Refer to Operation and Maintenance Manual, "General Hazard Information" for more information.Fuel Lines
Note: Make sure that the fuel lines do not contact nearby components. Contact with other surfaces will produce chafing that could lead to a leak. A properly installed fuel line will contact only the clips.
Illustration 1 g06190429
Top view of engine
Inspect fuel lines (1, 2) of the engine fuel system for the following conditions.Replace any fuel line which exhibits any of the following conditions.
Fuel lines which are cracked
Hoses which are soft
Outer covering that is chafed or cut
Outer covering that is ballooning locally
Flexible part of the hose that is kinked or crushed
Fuel lines which exhibit signs of leakage which are not the result of loose couplings or clampsInspect all fuel line couplings for leaks. Replace any fuel line that exhibits signs of coupling leakage.Inspect all clamps for the following conditions. Replace any parts that exhibit signs of any of the following conditions.
Missing or damaged grommets
Missing fasteners
Missing clampsFailure to replace a fuel line which exhibits any of the above conditions may result in a leak.