40
4. Connect the outlet of the fuel joint to the vacuum manometer.
5. Detect whether the negative pressure can be maintained for more than 10 seconds
under the specified pressure. Replace it if necessary.
Specified pressure: 50kPa
Remove and Check the Fuel Pump
1. Remove the bolt securing the fuel pump.
2. Remove the fuel pump.
3. Connect a vacuum manometer to the inlet of the fuel pump.
4. Block the outlet of the oil pump with your fingers and apply the specified positive
pressure. Check for air leaks.
Specified pressure: 50kPa
5. Apply a prescribed negative pressure. Check for air leaks.
Specified pressure: 30kPa
6. Connect a vacuum manometer to the outlet of the fuel pump.
7. Block the inlet of the oil pump with your fingers and apply the specified negative
pressure. Check for air leaks.
If necessary, disassemble the oil pump and check it.
Specified pressure: 50kPa
8. Remove the 4 bolts and separate the fuel pump cover from the fuel pump seat.
9. Remove the valve plate screw from the fuel pump body and remove the valve plate.
10. Press the plunger and diaphragm, rotate the fuel pump seat and align the notch with
the groove on the plunger. Remove needle roller.
11. Check whether there are cracks on the diaphragm, whether the riveting is loose, and
whether the valve plate is damaged. Replace it if necessary.
12. Follow steps 8-10 in reverse sequence and assemble the oil pump.
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