Many bosses or mechanics in the construction machinery industry will consult with editors, saying that their machines are weak, and the blue smoke is still burning the oil. The machine is not working, which is very distressing.
In fact, these are all signs of machine cylinder wear. As long as proper maintenance is carried out, the excavator will regain power. As for the overhaul, the bosses may wish to take a look at the following.
01. What is the overhaul of the diesel engine
"Overhaul" refers to the replacement of the four matching parts of the engine cylinder as well as the bearing bushes, seals, grinding or replacement of deformed parts. "Four matching" refers to: cylinder liner, piston, piston ring, piston pin, piston pin snap ring and cylinder liner water blocking ring and other parts.
02. Why do you need to overhaul the engine
It can be seen that the main repairer is replacing the wearing parts in the cylinder. So, what are the most wearable parts? First of all, there are several cooperations in the cylinder [piston-piston ring], [piston ring-cylinder liner], [piston-piston pin].
Do you know when construction machinery and equipment need to be overhauled?
Among these cooperations, the most prone to wear is [piston ring-cylinder liner] cooperation. There are three piston rings, two gas rings and one oil ring, which play the role of sealing gas, heat conduction, lubrication and oil scraping. Once worn, it will leak air (causing the vehicle to be weak and difficult to start), and oil will leak into the combustion chamber (blue smoke, burning oil).
Do you know when construction machinery and equipment need to be overhauled?
[Piston-piston ring] It is easy to accumulate carbon with the cooperation. The piston working chamber needs to reciprocate quickly. The impurities of mechanical wear and the impurities of the intake air are then accumulated in the gap of the piston ring. , Sliding, and then hurting the cylinder liner, the worst result is biting the cylinder, pulling the cylinder, off the cylinder, etc.
[Piston and Piston Pin] Generally, there will be no problems, but there have been some cases where the snap ring has not been installed, and the result is that the cylinder is directly destroyed.
03, under what circumstances need to overhaul the engine
1. Weakness of the vehicle
2. Blue smoke
3. Burn engine oil
Of course, the above is not absolute, and the final judgment should be made in conjunction with the use of the machine.
Do you know when construction machinery and equipment need to be overhauled?
Generally speaking, 8000-10000 hours of overhaul is normal under normal maintenance when the machine works on earthwork. Mine, broken hammer, use of inferior filter element, if maintenance is not timely, 4000 hours may require overhaul. There are also new cars that need to be overhauled in hundreds of hours if excessive work during the run-in period results in early grinding.
Of course, if your construction machinery vehicle fails, it is best to first find the vehicle after-sales, or consult a technical staff, so as to better determine whether the vehicle has a major failure!
