During the driving of the electric stacker, the sliding gears automatically fall off and mesh; the shift lever or the reversing lever automatically jumps back to the neutral position. The main reasons are: 1) The teeth of gears or gear sleeves are ground into cones. 2) The external key teeth on the transmission shaft and the internal keyway of the sliding hub are worn out. 3) The gear shift fork shaft groove or positioning ball is worn, the positioning ball spring is too soft or broken. 4) The transmission bearing is worn and loose. If it is found that a certain gear is out of order, still put the gear lever in that gear and turn off the engine, and the electric pallet truck
will disassemble the transmission to check the gear meshing. If the mesh is not good, check whether the bearing is worn or loose, whether the gear shift is deformed, and whether the gap between the fork end and the gear fork groove is too large. If the gap is too large, the fork end should be welded and repaired, and the deformation of the transmission shift fork should be corrected. If the gear meshes well, check the positioning device of the shift mechanism. Remove the shift fork shaft of the electric stacker to check the positioning spring. If the spring is too weak or broken, it should be replaced; the groove of the shift fork shaft should be repaired. The gear meshing and shifting mechanism are good. The front and back movement of the gear teeth and the shaft should be checked. If the gear teeth are ground into a cone shape, they should be replaced in pairs. If the shaft moves back and forth loosely, adjust.
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