CB08 Electric injection common rail fuel pump 0445025505 for Quanchai diesel engine.

Maintenance methods of diesel engine fuel injection pump

(7) Standard high-pressure oil pipes should be used
During the fuel supply process of the fuel injection pump, due to the compressibility of diesel, high-pressure diesel will form pressure fluctuations in the pipe. It takes a certain amount of time for the pressure wave to transmit in the pipe. In order to ensure that the fuel supply interval angle of each cylinder is consistent, the fuel supply is uniform, and the diesel engine works smoothly, the length and diameter of the high-pressure fuel pipe are selected after calculation. Therefore, when the high-pressure oil pipe of a certain cylinder is damaged, it should be replaced with a standard length and diameter oil pipe. In actual use, due to the lack of standard oil pipes, other oil pipes are used instead. If the length and diameter of the oil pipes are not considered to be the same, the length and diameter of the oil pipes will vary greatly. The oil advance angle and oil supply volume change, resulting in unstable operation of the whole machine. Therefore, standard high-pressure oil pipes must be used in use.

(8) Regularly check the wear of relevant key slots and fixing bolts
Relevant key slots and bolts mainly refer to camshaft key slots, coupling flange key slots (oil pumps that use couplings to transmit power), semicircular keys, and coupling fixing bolts. Due to long-term use, the keyway of the camshaft of the fuel injection pump, the keyway of the flange, and the half-round key will be worn out, causing the keyway to widen, the installation of the half-round key is not firm, and the advance angle of fuel supply will change; the key will roll off, resulting in power transmission failure. , so it is necessary to check regularly, repair or replace worn parts in time.