The transmission gear jumping fault phenomenon: Automobile Gear in the driving rod automatically jump back to a neutral position. This phenomenon occurs in the middle, high speed, sudden changes in load or when the vehicle is subjected to severe vibration, and most of them are in the high gear shift. Related reading: how to extend the life of the engine valve to improve the engine turbocharger inlet system introduction.
Reasons for the failure of transmission jump:
L) due to gear, gear sleeve or synchronizer cone disc tooth wear is excessive, formed along the direction of tooth meshing, produces an axial thrust, in the work and the vibration shaking, the speed change of the inertial impact force, meshing gear axially away;
2) variable speed and bending deformation, wear too much, fixed screw loose or shift rod deformation, so that the gear can not be normal meshing;
3) self-locking device wear loose, the elastic force of the spring is insufficient or broken, causing the locking force is insufficient, the transmission fork shaft cannot be reliably positioning;
4) gear or gear wear too much, along the direction of tooth grinding cone;
5) shaft and bearing wear, axial clearance is too large, or the first and the two shaft and the intermediate shaft is not parallel to the gear meshing and can swing up and down by jumping;
6) shaft spline tooth and sliding gear spline wear too much;
7) the deformation of the shaft of the second spline or the transition of the key tooth wear, the loosening of the locking nut causes the transmission of the shaft or the gear;
8) Baotou beiben accessories synchronizer locking pin loosening, synchronizer apart or engaging tooth length direction has serious wear;
9) the transmission is not firmly fixed.
The judgment and elimination of the gear shifting fault:
L) found in a jumping, will change the gear shift lever, and remove transmission cover watch gear meshing, such as good, should check the transmission fork shaft locking mechanism;
2) promote the transmission fork positioning device test jump file by hand, such as poor positioning, need to remove the speed shifting fork shaft ball and spring inspection, such as the spring is too soft or broken should be replaced. If the shift fork shaft groove wear too much should be repaired or replaced;
3) check the gear meshing, such as gear is not fully engaged, with hand push jump gear gear or gear sets the correct meshing, should check the transmission fork is bent or too much wear, and a transmission fork fixed screw is loose, fork end and gear for groove clearance is too large. If the transmission fork bending correction; as a result of the transmission fork lower wear and sliding gear slot excessive looseness should be removed for repair;
4, such as the transmission mechanism is good, and the gear or gear sets can be properly engaged, you should check the gear is worn into a cone, such as severe wear should be replaced;
5) check Baotou beiben heavy duty truck accessories bearing and shaft wear, such as shaft wear, bearing looseness or transmission shaft along the axial movement, should be removed for repair or replacement;
6) check the working condition of the synchronizer, if the fault should be repaired or replaced;
7) check Baotou beiben accessory gearbox fixed bolts, such as loose should be tightened.