First of all, make sure that the oil path of the self feeding flat mouth mixer is smooth. After there is no air in the diesel engine supply system of the self feeding flat mouth mixer, remove the oil pump cover plate, move the control handle, and move the oil pump pull rod to see whether the pull rod is flexible and whether the plunger spring is broken.
The diesel engine can be started to run at medium speed for 10 minutes under the condition that the pull rod of the self feeding mixer is flexible and the plunger spring is not broken. If the fire is still broken, a copper hammer can be used to tap the big nut of the fuel transfer pump gently and listen to the sound of the diesel engine at the same time. If the sound is abnormal, it means that the piston and push rod of the fuel transfer pump are jammed and repaired or replaced.
Remove the fuel injector assembly and rotate the crankshaft for several turns, that is, water is ejected, which indicates that there are cracks or sand holes in the cylinder head and cylinder block. In this case, you can explain to the user or report to the self feeding flat mouth mixer company. After the low-pressure oil flow is smooth, the air in the oil circuit can be removed by hand pressure pump, and the pump head vent screw can be opened until there are no bubbles, then the vent screw can be tightened.
The nozzle does not atomize, the plunger spring and spring seat of the oil pump are broken, stuck and does not work, or there is water in the diesel oil. Remove the nozzle assembly to check the opening pressure and atomization. If the nozzle assembly is normal, the user can load clean diesel into the pot and conduct the test by using the oil bypass method. Open the oil tank switch of the self feeding mixer, remove the oil inlet pipe of the oil pump, and check the oil flow. If the oil flow is fast, it means it is normal. If the oil flow is intermittent, check the oil circuit.