Maintenance is to make the diesel generator work properly, but some bad habits of repair make you a little out of money. So, have you been concerned about the maintenance process of the diesel generator? Ito Power's staff found that some users did not choose a professional manufacturer for repairs, resulting in frequent equipment failure. This situation is likely to be related to the bad habits of repairs. Today Xiao Bian came to remind everyone about some maintenance of diesel generators. bad habit.
First, replace the cylinder pad does not remove the residual cylinder pad
At present, some cylinder head gaskets are graphite products. Such cylinder head gaskets have strong adhesion and good sealability, and can only be used once. When removing the graphite cylinder pad, the remaining old cylinder pad that adheres to the plane of the body and cylinder head must be removed. Due to the unevenness of the debris that adheres to the contact surfaces of the engine body and the cylinder head, after the cylinder head is mounted, the pressure of the cylinder gasket is impractical, and the shock of the high-temperature and high-pressure gas during the operation of the diesel generator set cannot be endured, and the cylinder gasket is easily damaged.
Second, install the piston pin does not warm the piston
When the aluminum piston expands when heated, there is a certain degree of tightness when the piston pin is inserted into the piston pin hole at room temperature. When installing, the piston should be heated to about 90°C in oil or water beforehand. Then remove the piston. When hot, the piston pin can be smoothly pushed into the piston pin hole (note the assembly direction).
Third, replace the valve does not grind
In order to ensure the valve's tightness, when replacing valves and valve seats, first use a valve reamer with an appropriate angle, apply the abrasive paste between the valve and the valve seat, and grind it with a valve grinder or hand until grinding. Strips 1 to 1.5 mm wide, neat and dark gray. To inspect the valve sealing method: Wash the valve assembly and reinstall it on the cylinder head according to the original position. Pour gasoline from the intake and exhaust ports respectively. After 1 to 2 minutes, observe that there is no leakage between the valve and the valve seat. The phenomenon indicates that the seal is good.
Fourth, the back of the bearing pad or paper
Crankshaft journal and bearing wear beyond a certain range, so that the gap increases. At work, oil leaks and oil pressure decreases, resulting in poor lubrication, increased wear, and an abnormal percussion sound. Repair method: The crankshaft should be removed and sent to a repair shop to be ground with a crankshaft grinder, and a thickened bearing bush with a size adapted to restore its original performance. For example, on the back of the bearing pad or paper, not only can reduce the gap between the shaft and the tile, but also when the crankshaft under pressure to deform the bearing, damage the original gap, especially pad, can greatly reduce the heat transfer performance.
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Fifth, change the oil indicator to wooden rake
After the diesel generator sets are started, the oil indicator rises, indicating that the diesel engine is well lubricated, and the oil spray holes are exposed, so that the oil is sprayed from this hole and the crankshaft mechanism is lubricated, so that the diesel generator sets work normally. However, some operators found that the oil indicator was damaged, pulled it out, thrown it out, and put it into the raft. The raft will block the oil jet hole, and the rocker mechanism will not be lubricated to accelerate the machine wear.
We must pay attention to the above five bad habits. Whether it is to repair or replace the defective parts by ourselves or to other personnel, we must first avoid making such mistakes. Second, we must look at other personnel in the maintenance process. It is not such bad habits that can be corrected in time to ensure the normal operation of the Shanghai diesel generator after maintenance. So, do you understand comprehensiveness?
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