What are the misunderstandings of maintaining mini road rollers?

 The service life of a mini road roller depends on the product quality of the small roller compactor on the one hand, and the maintenance of the staff using the mini roller compactor on the other. If you accidentally use these misunderstandings, not only will the service life of your small rollers not be extended, but it will be shortened instead.

Misunderstandings in the maintenance of small roller compactor:

1. The new product is not selected and matched: the cylinder liner piston of the mini vibratory road roller must be checked for the size grouping code of the standard cylinder liner and piston. The cylinder liner and piston must be installed with the same size grouping code to ensure the standard fit clearance .

2. Inaccurate measurement of cylinder clearance: The clearance in the direction of the long axis of the ellipse shall prevail during the measurement, that is, the measurement of the piston skirt is perpendicular to the piston pin hole.

3. Open flame heating piston: the open flame directly heats the piston, the thickness of each part of the piston is uneven, the degree of thermal expansion and contraction is different, and it is easy to cause deformation. If it reaches a certain high temperature, the metal structure will be damaged after natural cooling and reduce wear resistance , The service life will be greatly shortened.

4. Emery cloth polishing the bearing bush: In order to increase the contact surface between the bush and the shaft, many maintenance workers use emery cloth to polish the bearing bush. Because the sand is hard and the alloy is soft, the sand is easy to be embedded in the alloy during grinding, which accelerates the wear of the bush when the engine is working. , Shorten the service life of the crankshaft.

5. Engine oil is only added and not changed: There are many mechanical impurities in the used oil, even if it is exhausted, there are still impurities in the oil pan and oil circuit.

6. Lubricating grease indiscriminate use: When installing the cylinder head gasket, some road roller repairers like to apply a layer of grease on the cylinder head gasket. The cylinder head gasket not only requires strict sealing of the high temperature and high pressure gas generated in the cylinder, but also the cylinder head and cylinder body. For cooling water and oil with a certain pressure and flow rate, grease the cylinder head gasket. When the cylinder head bolts are tightened, part of the grease will be squeezed into the cylinder water channels and oil channels. The grease left between the cylinder head gaskets is in the cylinder When working, high-temperature and high-pressure gas is easy to hit from here, destroying the cylinder gasket and causing air leakage. In addition, when the grease is exposed to high temperature for a long time, carbon deposits will occur, which will cause premature aging and deterioration of the cylinder gasket.

7. Bolts are tightened too tightly: Too much pre-tightening force will cause the screws and bolts to break or the threads to slip.

8. Too high tire pressure: Too high or low tire pressure will affect its service life, and it is also harmful to safe driving.

9. Sudden addition of cold water to the water tank "boiling": Sudden addition of cold water will cause the cylinder head and cylinder body to "explode" due to excessive temperature difference. Therefore, once the water tank is found to be "boiled" during use, emergency measures should be taken to ensure that the engine cooling water is cooled by itself.