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Tighten the excavator segment bolt request

hits:806    date:2019-08-30

  Excavator segment bolt is a small part of the excavator and a small component. However, it is also an important component of the excavator. It is also required during installation. It must be tightened, but it is not a small screw. It is also required to be tightened.

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  In fact, not only excavator segment bolt, many parts of the construction machinery fixed or connecting bolts have tightening torque requirements, such as injector fixing bolts, cylinder head bolts, connecting rod bolts, flywheel bolts, etc., some stipulate the tightening torque, some stipulate the tightening angle, The tightening sequence is also specified. Some maintenance personnel think that anyone who tightens the bolts will do it, it does not matter, do not tighten according to the specified torque and order, do not use the torque wrench, or use the force rod at will, and feel tight by the feeling, resulting in a large difference in tightening torque.

  Excavator segment bolt when tightening, it is necessary to pay attention to insufficient torque. The bolt is prone to loosening, which will cause the cylinder liner to be damaged, the bearing bush to loosen, oil leakage and air leakage. If the torque is too large, the bolt will be easily deformed or even broken, and sometimes the threaded hole will be damaged. Affected the quality of repairs. It was checked that the 24 bolts that connected the pump wheel and the cover wheel were not tightened in the specified order and torque. Therefore, when repairing construction machinery, be sure to tighten the bolts according to the specified torque and order to prevent mechanical failure due to excessive tightening torque, too small or improper sequence.

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