Diesel fuel injection pump and the reasons for exclusion Mifengbuyan

Diesel engine fuel injection pump and the oil is turned on, to form a sealed circuit , when the original body of the air , the engine should stop working for no oiling .
At this time, machine hand should first check the stock of diesel fuel in the tank , if exhausted , into the pharynx whether to leave the oil pipeline ; second is to check whether the fuel tank outlet is blocked , resulting in the formation of vacuum circuit can not supply , then the fuel injection pump bleed screw loose, hand pumps pump oil, if a large number of bubbles or oil foam appears and oil do not feel carefree ,cargo seals indicating low pressure oil are blocked , then check the coarse and fine diesel filter clear whether the blockage , tubing for cracks , touch deflated ; whether the tubing joints forget to install the gasket or gasket is damaged, causing a leak or the air intake .
When the hand pump oil pump , oil feels very smooth, but there is no pressure, which was mainly due to fuel pump relief valve in the oil return on spring break or fatigue deformation, wear or dirt ball paving and Mifengbuyan so low oil pressure oil supply shortage caused by low fuel pump . Check the return oil pressure relief valve sealing effect , hand blocked inlet mouth blowing , blowing does not move as normal, otherwise Mifengbuyan , hand pumps pump oil, the handle should feel a stretch tic pressure very easy to handle when opening or automatic back .
For the old-fashioned hand pump should also check the fuel pump inlet pipe to the fuel tank between the oil is blocked, if the majority is due to clogging pump inlet strainer below clogged by dirt or gasket damaged due. Hand pump oil pump shaft the handle when you feel no suction, when the handle is depressed , feeling great resistance , mainly between pump the oil to the oil pump clogged . Mostly due to fuel pump inlet screw with anti-loaded pressure relief valve , fuel pump in the non-return valve installed backwards or wear off very , hand pump aging damage rubber container seals and other reasons .
Such as fuel injector return pipe has a lot of bubbles appear , which was mainly due to a cylinder injector nozzle stuck in the open position , he went to the high pressure gas cylinder injection pump body . The oil filter return pipe connected at one end removed, blocked oil return port filter , bubbles disappear , indicating a fault in the fuel injectors, and then find which cylinder injector nozzle is stuck, be ruled out.