1.321-0990 Diesel Injection Technical Support
1.1. 321-0990 Diesel Injection Part Number Location
E.g.：See the diesel injection part number as follows:
Pic No.1
| No. |
Name |
| A |
brand, logo, part number,
series number |
| B |
nozzle part number |
1.2. 321-0990 Diesel Injection Application Scenarios
Pic No.2
Matching Car Model: Caterpillar 320D excavator
Pic No.3
| No. |
Name |
No. |
Name |
No. |
Name |
| 1 |
Adaptor Fixing Bolt |
2 |
Gasket |
3 |
Fuel Injection Adaptor |
| 4 |
Diesel Injection |
5 |
Diesel Injection O-ring |
6 |
Diesel Injection Nozzle Gasket |
| 7 |
Intake Gasket |
8 |
Intake |
9 |
High Pressure Common Rail Pipe |
2. 321-0990 Diesel Injection Installation Precautions
- The replacement of the diesel injection must strictly follow the electrical system, the approved pressure of the low-pressure fuel intake system, the approved pressure of the high-pressure fuel circuit system, and fuel system replacement consumables requirements (including the low-pressure fuel circuit system filter and the high-pressure fuel circuit) specified in the vehicle engine maintenance manual;
- Replacement of wearing parts of the fuel system, cleaning requirements for the connection between the fuel system and the diesel injection, the fitting clearance of the diesel injection connection, the installation angle and tightening torque of the diesel injection, the fitting clearance of the intake system, and the fitting clearance of the exhaust system to ensure the service life of the engine and the normal operation of the diesel injection.
- When installing the diesel injection on the engine, it is necessary to clean the engine block, cylinder head and other parts connected to the diesel injection, and ensure that there is no dust, carbon deposits, water, rust spots, etc.
- Before installing, check whether the diesel injection nozzle gasket has been replaced and installed on the diesel injection.
- When installing the diesel injection, apply lubricant between the diesel injection, fuel nozzle sealing gasket and O-ring.
- Failure to replace the gasket with a new one may result in:deformation of the tight cap of nozzle, deformation of nozzle, deformation of nozzle orifice, oil leakage and air leakage, which will cause serious damage to the diesel injection and nozzle to break and cause damage to the engine.
- When installing the diesel injection on the engine, please carefully check the components related to the installation of the diesel injection, such as the diesel injection pressure plate, screw, diesel injection rod and other accessories are not deformed, and install it in strict accordance with the operation steps of the engine maintenance manual.
- It is forbidden to operate the bare diesel injection for a long time in an environment with serious dust pollution and corrosion to iron products.
- It is forbidden to operate the bare diesel injection for a long time in a strong magnetic field environment.
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