TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 202 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION Fuel lines should be inspected for kinks, cracks or anything that would restrict fuel flow or allow air to enter the lines. Be sure to check the lines all the way beck to the tank and remember that there is a strainer inside the tank which can become plugged. You will have to remove the tank if it becomes necessary to check this. Replace fuel lines, refer to (para 3-25) Poor starting and excessive smoke after start up can be the result of a restricted fuel supply. This restriction most likely will be from a plugged fuel filter but can also be caused by a pinched or kinked fuel line. After the engine warms up, it generally will run satisfactorily. If the restriction gets progressively worse, top speed and performance will be affected also. FUNGUS In warm or humid weather, fungi and/or bacteria in the fuel can cause fuel system damage by plugging the fuel lines, filter, or injection nozzles. For removal, replacement and torques, refer to (para 3-33) or notify DS maintenance. Excessive roughness on any of these parts is an indication of wear. The pushrod should slide smoothly in the engine block. If you notice any roughness on the end of the pushrod be sure to check the lobe on the camshaft. NOTE If the pump or rod is worn, replace. Refer to (para 3-23). If the lobe on the camshaft is worn, notify DS maintenance. Rerun Test Chain You may have corrected some problems but there may be others including the fuel pump. For removal, replacement and torques, refer to (para 3-23). FUEL SYSTEM 2-115