RuiAn HuiHua Auto Oil Pump CO.,LTD.

Oil pressure after oil pump replacement parts divisions lights flashing. Valve abnormal sound

First of disintegration and check for new oil pump, the discovery of new oil pump working space within no oil. Testing of the new oil pump, with a feeler new oil pump oil pump gear face to face cover a distance of 0.05 mm, far less than the wear limit 0.15mm; reuse feeler new oil pump tip clearance and backlash, is 0.05 mm, is far less than the wear limit 0.20 mm. Test results show no new oil pump failure.

To further prove that the new oil pump working conditions, will release a new oil pump the oil. Rotate the oil pump drive gear, oil can continue to be pumped out. Hand to block the oil pump outlet port, machine electric oil pump drive gear can not rotate, indicating that the oil pump work well.

So then the new oil pump fitted to the cylinder block, refitted after the test engine, engine valve sound normal, normal oil pressure, oil pressure warning light goes out.

(1) Symptom

Czech pilots reflect the car's oil pressure bitter divisions lights shining through to the repair shop check the oil pump is faulty. Repair personnel change after the test with a new oil pump, oil pressure warning light also flashes while the valve makes strange noises. Anchorage determine the cause of abnormal sound is not pump oil pump hydraulic valve tappet Department does not lead to oil. Repair personnel removed the old original car exchange after the test pump, valve abnormal sound disappeared, but the oil pressure warning light is still flashing.

(2) Failure

When installing a new oil pump inside without first filling oil.

(3) Troubleshooting

The situation described by the driver, resulting in this failure because there are basically two: First, the poor quality of the new oil pump, the second is the oil pump is not installed correctly.

Jetta gear is used in the electric oil pump, i.e. inside the housing a pair of intermeshing gears. Sealing both ends of the gear cover, casing, cover and gear form a sealed working space, and from the meshing teeth of the suction chamber and the disposition of the oil chamber. Suction chamber communicating with the inlet, the oil chamber and the oil outlet pass. When the oil pump gears, the suction chamber gradually withdraw meshing teeth, gradually increasing the volume of the suction chamber, creating a vacuum. Makes sump oil is sucked out and pressed into the oil chamber. Replace the oil pump at the beginning, because there is no new oil pump oil out of the oil suction chamber and an air chamber memory. When the oil pump gears, it is difficult to form a vacuum in the suction chamber, it can not pump people. And then put the old pump, because the old pump has oil, although its performance degradation, but can also pump out the oil, but the pressure is low, resulting in oil pressure light flashes & P report. New oil pump in the oil check its performance, the internal stained with oil, then re-installed and then be able to pump out the oil after it. With a pump, whether to raise oil, their working conditions are quite different.

It should be noted, on the exchange with a new piece or long after the gear-type machine electric pumps, equipped with the former must not forget to add oil to avoid similar failures should not happen.