The transmission of abnormal noise is the main bearing and gear meshing wear loose open between the abnormal noise, basically occurred in two periods, namely the gap ring, gear ring.
(1) neutral sound
An abnormal noise refers to the transmission is in neutral position when there is noise, the clutch pedal after noise elimination.
Cause of failure:
When the transmission and engine are installed, the engine crankshaft and the transmission shaft center line are not concentric.
The second shaft bearing without outer cylindrical roller bearing wear, dirt, fluff. Individual bearing damage, abnormal noise and the impact of a beating.
In the maintenance of the meshing gear is not matching, repair is not replaced in pairs, resulting in poor meshing.
Because of the frequent overload, resulting in two hanging shaft bending.
The first shaft bearing damage, abnormal noises.
(2) after the file is hung
The sound of the rear gear is that the transmission is put into the gear, and it is caused by the impact of the meshing gear.
Cause of failure:
Due to the long-term overload, over hanging, repair is not timely, the transmission shell of the shape of ultra precision, repair quality is not high, resulting in abnormal sound.
Because the purchase of the gear is not the production of supporting plants, or self processing, gear manufacturing process and installation error is too large to destroy the normal meshing gear, so that the process of gear contact impact.
Baotou North Benz accessories synchronizer cone naves damage, surface damage.
The replacement of the Baotou North Benz accessories gear properly, change with the shaft or bearing damage to the normal gear.
The bad technical state of the transmission system, such as separation of clutch, transmission shaft imbalance caused by resonance, the transmission gear shock interaction in meshing process.
(3) the judgement of abnormal sound transmission
The process of generating the sound of the transmission gear is caused by the vibration of the shaft and the shaft, and the rolling bearing sends out the abnormal sound. The looseness of bearing damage, you can use the following methods to ascertain location.
The front bearing of the two shaft rings, and the engine can not be heard after hanging.
After the two shaft bearings, must be in the car to change the speed to hear.
Due to the looseness of bearing of the gear ring, change speed, sound change significantly.
It should be emphasized here: the replacement of the northern part of Baotou Benz gear transmission should be replaced in pairs, in order to ensure good meshing, installation and adjustment should pay attention to the gap.