When shifting, the operation of the transmission rod is heavy and can not be hung in the gear flat.

2. The cause of the failure

(1) the maladjustment of the manipulating mechanism, the flexural deformation of the gearshift rod and rod of the heavy truck parts of the north of Baotou, and the loosening of the joints of each activity, so that the meshing of the gears is not in place.

The fork is fixed with loosening, bending or serious wear, and the serious corrosion of the end of the fork makes the shift of the fork shaft difficult.

(3) bending, rusting or burr of the fork shaft, the lock spring is hard or interlocking pin to be stuck, so that the shaft of the fork can not move axially.

The end face of the gear is caused by friction, or the joint sleeve is worn, floral, or damaged, and the face chamfer of the new gear teeth is too small.

5. Baotou North Ben heavy truck fittings synchronizer cone ring teeth wear along the axis direction to be convex or broken; the friction cone surface spiral groove wear or polish, make the gear ring end face and the gear end surface shrink or even have no clearance, reduce the friction effect, the synchronizer fails.

The improper selection of lubricating oil, such as viscosity and the oil film can be easily adsorbed on the surface of the cone ring, synchronizer or failure; high temperature lubricating oil glue and fill cone synchronizer ring surface and spiral groove, resulting in damage to the synchronizer.

The synchronizer assembly on the output shaft swing is too large, or long period neutral sliding off, the intermediate shaft does not work, causes the output shaft to generate heat to dry grinding drag, the synchronizer is damaged.

Baotou beiben heavy truck parts separation of clutch.

3. Analysis and diagnosis

At the time of diagnosis, it is analyzed according to the feeling of the shift and the accompanying sound.

When the gearshift lever manipulates heavy or deviates from the position, it is caused by the control mechanism failure. If it is in disorder, the length and position of the rod will be adjusted according to the regulations. If it is worn or deformed, the wear parts should be replaced.

When the gear is in the right place, when it is difficult or slightly noisy when hanging two or three or four or five gears, the damage of synchronizer is mostly due to the reduction of friction effect.

During running, when the neutral skid is running, it is found that there is abnormal sound inside the transmission, and the same noise is also heard in the same time. The reason why it is difficult to hang up is that the synchronizer is loose.

It is difficult to block four or five gears, and the feeling of two times shifting is the excessive wear of the fork and the fork slot, or the failure of the synchronizer cone ring deformation.