GUANGZHOU JIAJUE TRADING CO.,LTD Quality Control

Quality Inspection Steps for Caterpillar Injectors and Diesel Pumps

1. Inspection of Diesel Pump:

a. Check the functionality of the diesel pump using a pump tester. Connect the tester to the pump, start the engine, and observe the pressure reading on the tester. A normal reading indicates that the pump is working properly. Any abnormal reading may require pump replacement.

b. Examine the pump for any leaks, dirt, or damage. Visually inspect the pump for any visible damage or leaks. If any are found, immediate action should be taken.

c. Inspect the pump connections. Ensure that all connections between the pump and the engine are secure and intact. Loose or damaged connections should be tightened or replaced.

2. Inspection of Fuel Supply Pressure:

a. Connect an oil pressure gauge to the fuel supply line. Start the engine and observe the gauge reading. The normal fuel supply pressure should be between 200-500 kPa. If the pressure is too high or too low, adjustment may be required.

3. Inspection of Injectors:

a. Visually inspect the injectors for any leaks or damage. Look for any visible cracks, leaks, or damaged parts.

b. Check the injector connections. Ensure that all connections are secure and tight. Loose or leaking connections should be tightened or replaced.

c. Test the injector spray pattern. Use a high-pressure spray tester or a special spray detection reagent to spray directly onto the injector. Observe the spray pattern for any unevenness, dripping, or misdirection.

d. Check the injector resistance. Use a multimeter to measure the resistance of the injector. Compare the measured value with the specified value to ensure it falls within the acceptable range.

e. Inspect the injector nozzle for blockage. Use a special tool to check for any blockage in the injector nozzle. Blockages can affect fuel flow and spray pattern.

f. Test the injector's fuel delivery volume. Connect the injector to a fuel delivery tester and start the engine. Measure the fuel delivery volume of each injector to ensure it is within the specified range.

g. Perform a simple test by feeling the vibration or sound of the injector needle valve opening and closing while the engine is running. If no vibration or sound is felt, it may indicate a fault in the injector or its circuitry.

4. Inspection of Fuel Injection Timing:

a. Check the fuel injection timing mechanism for proper operation. Ensure that the fuel injection timing is synchronized with the engine speed. Any timing issues may require adjustment or replacement of the timing mechanism.

By following these quality inspection steps, you can ensure the proper operation and performance of your Caterpillar injectors and diesel pumps. Regular inspection and maintenance are crucial for maintaining the reliability and efficiency of these components.