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    Diesel fuel injection pump into the air and elimination and fault

    Diesel fuel injection pump into the air and eliminate the reasons for the failure: Diesel engine oil pump and connected, forming a sealed circuit, when the original body with air, the engine oil should be for non-stop work. At this time, machine hand should first check the stock diesel tank, is used up, whether to leave the oil pipeline into the pharyngeal surface; second is to check the fuel tank outlet is blocked, resulting in the formation of vacuum circuit can not supply, Then put in the gas pump screw loose, hand pump oil pump, if a large number of air bubbles or oil foam appeared and oil do not feel carefree, low-pressure oil that was blocked, then check the coarse and fine diesel filter is blocked, the tubing for cracks, touch deflated; whether the tubing joints forget to install the gasket, or gasket is damaged, causing leakage or air intake.

    When the hand pump oil pump when the oil is very smooth feel, but no pressure, which was mainly due to the oil pump relief valve on the return of spring break or fatigue deformation, wear or dirt ball paving the Mifengbuyan , low oil pressure is too low to pump oil supply shortage caused. Check back to the oil pressure relief valve seal, hand to block the inlet mouth blowing, blowing not move as normal, otherwise Mifengbuyan, hand pump oil pump when the handle should feel a stretch tic pressure open when the handle is easy or automatic back.

    For the old-fashioned hand pump should also check the fuel pump inlet pipe to the oil line is blocked between the fuel tank, if blockage is due to pump most of the following into the oil filter gasket is damaged or blocked due to dirt. Hand pump oil pump shaft without moving the handle when you feel the suction, pressed the handle, it feels great resistance, mainly by the pump to pump oil between the plug. Because most of screw into the oil pump relief valve fitted with anti-, pump in the anti-return valve fitted or worn off very, hand pumps aging damage rubber seals and other reasons.

    Such as the return pipe on the fuel injector has a lot of bubbles appear, mainly due to fuel injection nozzles of a tank stuck in the open position, he went to high pressure gas cylinder in the pump body. The return pipe connecting one end of the oil filter removed, blocked filter back to the port, the bubble disappeared, indicating failure in the fuel injector, and then find which cylinder is stuck for fuel injection nozzles, were excluded.


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