1. 4307475 Common Rail Injector Technical Support
1.1. 4307475 Common Rail Injector Part Number Location
E.g.：See the common rail injector part number as follows:
| No. |
Name |
| A |
Brand, logo, part number, series number |
| B |
Nozzle part number |
1.2. Reasons For 4307475 Common Rail Injector Not Working Normally
- There is air in the oil circuit of the engine fuel system.
- Vehicle oil pump oil supply system is not normal.
- Engine common rail system oil leakage or pressure limiting valve is damaged.
- There is a short circuit, cutting out and poor contact in the wiring harness connected to the common rail injectorof the vehicle.
- The long-term placement of the common rail injectorcauses the anti-rust oil to solidify, and the internal components are stuck or the oil holes are blocked.
Before installing, carefully check whether other components in the common rail system except the common rail injector is damaged so as to prevent the common rail injector from not working properly after being replaced.
1.3. Causes of 4307475 Common Rail Injector Being Damaged
- Failure to operate correctly according to the engine maintenance manual during disassembly and assembly resulted in damage to the common rail injector.
- The fuel used for the vehicle does not meet the standard, causingdamage to the common rail injector, such as: the water content in the fuel oil exceeds the standard, iron powder, aluminum powder, sulfide impurities exceed the standard, etc.
- The engine is not regularly maintained according to the engine maintenance manual (please refer to the vehicle maintenance manual for the maintenance mileage). For example, failure to replace the lubricating oil of the engine system for a long time will cause abnormal wear of the engine, excessive exhaust gas volume or a large amount of carbon deposits inside the engine. The filter is not replaced during maintenance or the replaced filter cannot reach the original filter standard. All above reasons can cause damage to the common rail injector.
- The abrasion of the oil pump produces iron powder and aluminum powder enter the CR Fuel injectorand cause damage to the common rail injector.
- The deformation and abrasion of fuel tank result in iron powder or aluminum powder entering the common rail injectorand causing damage to the common rail injector.
- The common rail injectoris damaged due to replacement or adjustment of the relevant parts of the common rail injector. For example, the valve clearance does not meet the standard after the engine is repaired, the replacement or modification of the wiring harness connected to the common rail injector fails to meet the original standard.
- The engine is overheated and overloaded for a long time working results in damage to the common rail injector.
- The common rail injectorwill be damaged naturally at the end of its working life.
- The common rail injectoris magnetized (common rail injector parts’ magnetic exceeded) causing the common rail injector to not work properly.
- Before replacing the common rail injector, please check the engine parts carefully according to the enginemaintenance manual to avoid the common rail injectorbeing damaged again after replacement.
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