Lifts, mobile lifting platform and other construction machinery applications can make high-altitude operation more efficient and more secure. However, in the maintenance of construction machinery, we need to pay attention to what issues?
    1 new products without matching
    Replacement cylinder liner Piston must check the size of the standard cylinder and piston block code, installed cylinder and piston must be the same size of the two group code to ensure that the standard with the gap.
    2 cylinder clearance measurement is not allowed
    When measuring, the clearance in the direction of the long axis of the ellipse is specified, that is, the gap between the piston skirt and the piston pin hole is measured. This measurement is more convenient and accurate.
    3 open fire piston
    Fire directly heat the piston, the piston parts of the uneven thickness, thermal expansion and contraction of different, easy to cause deformation, such as to achieve a certain high temperature, natural cooling after the metal will be damaged and reduce wear resistance, life will be greatly reduced.
    4 sand cloth polished bearing
    Many maintenance workers to increase the contact surface with the shaft, there are sand cloth polished bearing, because the sand hard, alloy soft, polished sand is easy to insert the alloy, the engine work to accelerate the wear of the bearing, shorten the life of the crankshaft The
    5 oil only add or not change
    There are many impurities in the oil used in the oil, even if the exhaust, oil pan and oil still exist in the oil.
    6 grease indiscriminate use
    Some repair workers to install the cylinder pad, like to apply a layer of grease in the cylinder pad, cylinder pad not only requires strict sealing of the cylinder produced by the high temperature and high pressure gas, but also sealed cylinder head and cylinder with a certain pressure and flow rate of cooling water And oil, coated with grease on the cylinder pad, when the cylinder head bolts tightened, part of the grease will be squeezed into the cylinder waterway and oil channel, stay in the cylinder pad between the grease in the cylinder work, high temperature and high pressure gas easily from here Impact, damage the cylinder pad, causing leakage. In addition, grease for a long time in the high temperature will produce carbon deposition, resulting in premature aging of the cylinder pad deterioration.
    7 The bolt is too tight
    Preloading over the assembly caused by screws and bolts broken or threaded slip wire and so on.
    8 tire pressure is too high
    Tire pressure is too high too low will affect its life, but also unfavorable safe driving.