The equipment has no power, the black smoke and the engine oil are burnt, and the equipment can’t work, which is very annoying.
In fact, this kind of data signal is all equipment cylinder damage, if appropriate maintenance is carried out, the excavator will restore the driving force.
01What is a diesel engine overhaul
"Overhaul" refers to the removal and replacement of the four supporting facilities components of the diesel engine cylinder and its piston pins, hydraulic seals, grinding or removal of deformed components. "Four supporting facilities" refer to parts such as cylinder liner, piston, piston ring, piston pin, piston pin snap ring and cylinder liner water blocking ring.
02Why overhaul diesel engines
It can be seen that the key to overhaul is to remove and replace vulnerable parts in the cylinder. So, what is the most vulnerable component? First of all, many in the cylinder cooperate with each other [piston-piston ring], [piston ring-cylinder liner], [piston-piston pin].
Among these many mutual fits, the most easily damaged is the mutual fit of [piston ring-cylinder liner]. There are three piston rings, two gas rings and one oil ring, which have the functions of sealing air, transferring heat, lubricating and draining oil. Once damaged, it will leak steam (causing the whole car to be weak and difficult to start), and car oil will leak into the combustion chamber (black smoke, engine burning oil).
[Piston-Piston Ring] Cooperate with each other, it is very easy to deposit carbon, the piston's personal working room must be reciprocating quickly, the residue of mechanical equipment damage and the residue of the air inlet will accumulate in the gap of the piston ring. If things go on like this, it will cause the piston ring to move and drag, thereby damaging the cylinder liner. The worst result is biting the cylinder, pulling the cylinder, de-cylinder, etc.
[Pistons and Piston Pins] Generally, it is not easy to cause problems, but there have been some instances where the snap ring forgot to install. The result is that the engine block is immediately broken.
03Under what circumstances must the diesel engine be overhauled
1. The whole car is weak
2. Smoke black
3. Engine oil burning is not absolute. It is necessary to integrate the application status of the equipment to make the final distinction.
I often see information inquiries, and when I go up, I ask: "My equipment is weak, what is the reason?" In fact, the excavator maintenance professional and technical personnel who are asking for such information cannot respond. When the information is inquired, the equipment must be clearly stated. The application of time, earthwork backfilling or iron ore work, maintenance status, etc. facilitate people to analyze the cause of common equipment failures.
Note: Generally speaking, during the earthwork backfilling of the equipment, under all normal maintenance conditions, 7000-10000 hour overhaul belongs to all normal conditions. Mine mining, breaking hammers, application of inferior filter elements, and maintenance are not immediate, and overhaul may be necessary within 4000 hours. There are also new machines that must be overhauled for hundreds of hours if they wear out early due to excessive work.
