The reasons why the engine is difficult to start or cannot be started are many, mainly due to the failure of the fuel supply system and the air supply system. First, the common faults and solutions of the fuel system 1. Diesel filter plug, oil or diesel filter plug; there are air in the oil. Solution: Clean the blockage and remove the air from the oil circuit. 2. The fuel injector is not supplied with oil or with insufficient pressure, poor atomization, oil dripping, etc.; the plunger adjusting arm or rack lug is out of the timing groove of the speed regulating lever fork; the injection pump plunger is severe Wear, oil supply pressure is too low, the oil valve wears badly and the seal is not tight; the gasket cracks and deforms, the oil valve spring breaks, and the fuel injector wears and snaps in the closed position. Solution: Find the plunger adjustment arm or gear lug out of the speed adjustment rod groove, should be disassemble the fuel pump and re-install correctly; at the same time check whether the fork groove is too worn, if it is found that the plunger is stuck in the stop position, it should be Demolition for repair or replacement of new parts; injection of no power should check whether the piston vice wear, return valve gasket wear; disassemble the injector, check the needle valve is stuck in the closed position, needle valve and fuel injection hole Whether it is burned or not, repair or replace the coupling according to the inspection result. 3. The vortex chamber insert clogs or shifts. Solution: Use iron wire to clear carbon deposits and install it properly. 4. Improper fuel supply advance angle. Solution: Check the fuel supply advance angle, increase or decrease the gasket, and install it correctly. 5. Excessive cold oil in the combustion chamber, excessive throttle opening, and low engine temperature. Solution: Close the throttle, open the decompression handle cradles, eliminate the excess oil accumulation in the combustion chamber; heat the water to increase the temperature before starting. Second, the air supply system of common faults and solutions 1. Air filter plug, can not suck enough air. Solution: Clean the air filter and replace the filter element. 2. The valve clearance is improper, so that the cylinder air intake is insufficient or close. Solution: Check to adjust the valve clearance so that it meets the regulations. 3. The piston cylinder assembly is seriously leaky. Solution: Replace the new piston ring. 4. Parts of the gas distribution mechanism are seriously worn, the gas distribution phase is incorrect, and the phase angle is too small.
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