Crane bearing telescopic crane loop and lifting arm luffing loop

• Telescopic crane loop

The hanging arm is composed of basic arm and a telescopic arm,mobile crane bearing a telescopic arm in arm in the basic set. Telescopic boom is controlled by the telescopic hydraulic cylinder and steel wire rope. In order to prevent the hanging arm falling on the mass of the balance valve, a telescopic loop.

• The lifting arm luffing loop

The so-called amplitude hydraulic cylinder is used to change the angle of the boom.( ship loader bearing ) Luffing operation is also required to prevent the drop in weight function, therefore the lazy arm amplitude circuit is also provided with a balanced valve. Failure of truck crane bearing hydraulic system is mainly manifested in the five loop, the most common fault is the system pressure is insufficient and the hydraulic cylinder retracts.