Excavator bearing installation

Excavator bearing installation
(1) Improper adjustment of the shifting device. If the transmission of this type of excavator adopts a mechanical manual shifting method, if the gear lever, vertical shaft, horizontal shaft and vertical fixing screws are loose, the transmission may "jump gear". Gearbox wear
(2) Sudden changes in external loads Due to the working nature of the excavator and the design of the machine itself, sudden changes in external loads will also cause the transmission to "jump". When the external load suddenly changes due to uneven road surface, excavator driving downhill or improper driving route, the sudden change of load will act on the gear meshing gear of the transmission through the wheels and drive shaft to make the gear mesh The gear is disengaged due to the axial thrust, causing the transmission to "jump gear". Degraded performance of the self-locking mechanism
(3) The transmission mechanism of the gear shifting device of the excavator relies on the sliding gear sleeve to move axially on the fixed gear sleeve and meshes with the driven gear of each gear to achieve gear shifting. In the process of frequent shifting, the tooth end faces of the above-mentioned meshing gears are easily ground into a conical shape, resulting in reduced meshing performance and resulting in "jumping gears".
(4) In order to prevent the transmission from "jumping gears", the excavator is equipped with self-locking gears in the case cover hole above the transmission fork shafts of the II, III and IV, V gears and in the I and reverse gear forks. Steel ball and spring. When the elasticity of the spring that plays the role of positioning self-locking is weakened or broken, the self-locking performance of the self-locking mechanism will decrease until it disappears, causing the transmission to "jump gear". At the same time, if the positioning steel ball or the groove on the shift fork shaft is worn, it can also cause the transmission to "jump gear".
(5) Improper operation method When the excavator is driving on a slope (especially when driving downhill), improper operation will also cause the transmission to "jump".