Oil is essential in the use of diesel engines, mainly from lubrication, cooling, cleaning and so on. Therefore, many drivers will pay attention to check the oil amount of oil, and by standard addition, but ignored the oil quality inspection and had deteriorated oil change, leading to some engine moving parts are always in poor lubricating environment operation, thereby accelerating the parts abrasion. Under normal circumstances, the oil loss is not large, but it is easy to pollution, thereby losing the role of protecting the diesel engine. In the diesel engine operation process, many contaminants (incomplete combustion of fuel, soot and carbon deposition and fouling) will be entered into the oil. For new or after the overhaul of the machine, after the trial operation, the impurities will be more, if only add not change, eager to put into use, it is easy to cause burning tile, holding axle and other accidents. In addition, even if the replacement of oil, some of the driver due to lack of maintenance experience or trouble, but also in the replacement of the oil pipe is not completely cleaned, so that mechanical impurities remain in the oil tank and oil circuit.

2, avoid butter with chaos.

(1) apply the butter to the cylinder pad of Baotou North express heavy truck parts. Butter is a kind of grease commonly used in construction machinery repair. It plays a role of lubrication and sealing. As a result, some of the repairman will apply a layer of butter to the cylinder pad when installing the cylinder gasket, which is believed to increase the tightness of the diesel engine. As you all know, this has affected the performance of the diesel engine. Cylinder pad is a diesel engine cylinder block and cylinder head are among the most important of the seal, it can not only seal of high temperature and high pressure gas generated inside the cylinder, but also can seal the cylinder cover and the cylinder cooling water and lubricating oil, so in the disassembly of cylinder pad, should pay special attention to its sealing quality. If the installation on the cylinder pad butter, when the cylinder head bolt, a part of the butter will be squeezed into the cylinder and the oil path channel, in between the cylinder pad butter in cylinder working, as affected by high temperature, a part will flow into the cylinder combustion, the other part is combined with the residual in the cylinder block and cylinder head on the surface, so that a gap is generated between the cylinder body and cylinder head gasket, flat, high temperature and high pressure gas easily from the impact of cylinder liner, cylinder gasket destroyed, resulting in leakage. In addition, the butter for a long time in the high temperature state will also produce carbon deposits, resulting in premature deterioration of the cylinder pad. Therefore, do not apply grease when installing the cylinder gasket.

(2) Baotou North Ben heavy truck parts, nuts, butter. In order to tighten the nut and prevent corrosion, many repairman oiled the bolts and nuts on the tires. In fact, this is a wrong approach. Because the tire nut is tightened, the thread is self-locking. This is due to the fact that the screw angle is less than the equivalent friction angle between the threads. In the given bolt connection, the screw lift angle is a certain value, and the equivalent friction angle varies with the friction state between the threads. Obviously, the equivalent friction angle between the threads is reduced, and the self-locking performance of the bolt connection becomes worse. Therefore, never apply grease or drip grease on the bolts and nuts of the tires. Doing so will loosen the nut and even cause an accident.

3, avoid cylinder and piston new, without matching, that is installed

When replacing the cylinder liner and the piston, it is assumed that both the new cylinder sleeve and the piston are standard parts. They are interchangeable and can be used when mounted. In fact, both the cylinder sleeve and the piston have a tolerance range. If the largest size of the cylinder sleeve with the smallest size of the piston, the gap will be too large, resulting in compression weakness, difficult to start. Therefore, we must change size grouping code check standard of cylinder liner and piston, fitted with the cylinder liner and piston size grouping code must be standard piston size grouping code and standard cylinder, the only way to ensure that the clearance between the two is the standard. In addition, the cylinder liner and piston cylinder is installed with the same grouping code at the same time, we must pay attention to dress before the test cylinder plug gap, in order to ensure the assembly standard, in front of the machine should also conduct a test, to prevent fake defective products.

4, avoid bolt screwed too tight

Engineering machinery in the process of disassembly, many parts of the bolts are specified torque requirements, such as transmission box, cylinder head, tires, and other parts of the connecting rod and the front axle, tightening torque have special provisions in the instructions, must not arbitrarily change. However, many users assume that tightening is safer, but too tight can result in screws or bolts broken and may cause trouble due to thread slip.

5, avoid tire pressure is too high

The tire inflation pressure of Wheeled Construction machinery is an important factor to determine its service life and work efficiency. Tire pressure is too high or too low will affect its service life, but also not conducive to safe driving, especially in the hot summer. The gas standard should be based on the standard tire pressure. As the temperature changes, the tire pressure is slightly adjusted. For example: summer should be lower than winter 5%-7%, because taking into account the high temperature in summer, gas heating, pressure increases, on the contrary, winter must reach the standard pressure or slightly lower.

6, avoid water tank boiling sudden cold

Engine overload operation, bad heat or water tank of water will cause water tank boiling, if immediately add cold water, will lead to the cylinder head and the cylinder block cracking. Therefore, use once found Baotou beiben boil water tank fittings, should take emergency measures to stop the operation, the diesel engine cooling water to cool.