Liaocheng Jiujiujiayi Fuel Injection Co LTD

we have been making every effort to decrease your using cost.

Jiujiujiayi regard quality as life,
Good Credit as soul,your success as duty



Jiujiujiayi mainly products are: diesel pump, diesel injector, diesel nozzle, injector valves, injector solenoide valves, pump metering valves, pump suction control valves / SCV, diesel plunger and delivery valve. moreover we supply injection pump &injector re-manufacture service. These products are sold to Europe, USA, central and south America, Southeast Asia and Africa. The goods quality are approved by these areas customers.



  • How to test nozzles by yourself

    Once the excavator encounters problems such as difficulty in starting, slowing down, and sudden increase in fuel consumption, many times the maintenance master will start with the inspection and cleaning of the fuel injection nozzle, which also explains the importance of...

  • Nine diesel / jiujiujiayi holiday notice

    oct.1st to oct 7th is National Day Holiday.

  • What’s solenoid working principle?

    Working principle of fuel injector 1. When the injector solenoid valve is not triggered, the small spring presses the ball valve under the pivot plate to the relief valve On the oil hole, the oil drain hole is closed and a common rail high pressure is formed in the valve control chamber. Similarl...

  • why delphi nozzles shock engine?

    please check four cylinder injectors flow rate data. adjust them into similar same.

  • How to repair CRIN Common rail injector?

    CRIN 1 /Common rail first generation common rail injector currently in the market there are: Cummins 0445120007  0445120121 0445120122 0445120123 . Komatsu excavator Mitsubishi 6M70 engine: 0445120006. Iveco; 0 445 120 002, Dongfeng Renault; 0445120084 0445120085 etc. Before changing the valve se...