Six major issues Weichai diesel generator sets must pay attention to when repairing

Weichai diesel generator set failure must pay attention to some matters when repairing parts. In order to ensure the effect of replacement repairs. So what do users need to pay attention to? Let's let Hua Quan technical staff give us a detailed introduction.

1, the assembly must pay attention to clean. If the machine body is mixed with mechanical impurities, dust, and oil sludge during assembly, it will not only accelerate the wear of the parts, but also cause blockage of the oil circuit, resulting in accidents such as the burning of the bearing bushes. Such as

When replacing a new injector, the rust preventive oil must be removed from the clean diesel oil at 80°C and used for sliding test.

2, pay attention to assembly technical requirements. Repair personnel generally pay more attention to valve clearance, bearing clearance, etc. However, some technical requirements are often overlooked. If the cylinder liner is installed, the upper plane should be about 0.1 mm above the plane of the machine body, otherwise cylinder leakage may occur. Continuous failure of the cylinder head gasket.

3. Note that some fittings must be replaced in pairs. The three precision coupling parts of the injector needle valve coupler, plunger coupler and outlet valve coupler are to be replaced in pairs. This can generally be done. However, some other accessories do not pay attention to the replacement in pairs, such as the replacement of gears, only the replacement of a more serious wear and tear, after assembly due to poor meshing, noise, increased wear and tear, the service life will be greatly shortened. If you change the cylinder liner, you should also replace the piston and piston rings.

4. Parts of variant products are not necessarily universal. Some diesel engine plants produce a lot of parts of a certain type of variant products are not universal, we must pay attention.

5, different parts of the same model (parts) are not universal. When using the repair size method, an oversized part may be selected, but it is necessary to look for which level of the part is increased. If only the crankshaft is increased after the first grinding of the crankshaft, if a bush of 0.5 mm is used, the scraping capacity of the bearing bush will increase, which will not only waste time, but also can not guarantee the repair quality, and will greatly reduce the service life of the bearing bush. .

6, to prevent parts misinstalled, missing equipment. In the case of a single-cylinder diesel engine, there are more than a thousand parts, and most of them have certain installation position and direction requirements. If they are not noticed, they are easy to misplace or miss. If the position of the swirl chamber insert is reversed, the fuel cannot directly pass through the start nozzle, making the engine start difficult or not start at all.

When the user used the Weichai diesel generator set, he encountered the situation of replacement parts repair. Don't forget to pay attention to the above matters!