When a car is running, especially in the initial overshooting or emergency braking, driving parts inside the bridge will be under great impact load. In order to ensure the normal operation of the drive axle, in addition to the internal organs and parts of a certain technical requirements, there are special requirements on the assembly accuracy. However, with the increase of vehicle mileage, the technical status of the parts of the drive axle will gradually become worse, resulting in a variety of failures.
Drive bridge is common fault has a ring and fever.
(1) the noise of the gear tooth is too large
The car, in the transform speed or speed moment of instability (such as drag files), a unrhythmic heavy thump, thump “crash in the axle. When the speed is relatively stable, the sound is reduced or disappeared. This phenomenon is the main, driven bevel gear gap is too large, you can adjust or replace the gear to restore its normal.
2) the gear tooth clearance is too small or the tooth is abnormal
The car driving axle, issued within a continuous gear bite chorus, sound frequency increases with the increase of speed; power, noise reduced parking, immediately stop the sound. This phenomenon is the main, driven bevel gear tooth clearance is too small or the tooth marks caused by improper adjustment. Occurs when the vehicle overhaul or replacement of the gear, you can re adjust to make it normal.
3) differential
In the north of Baotou, the difference between the main parts of the Mercedes Benz parts is that when the turning of the vehicle and the difference between the left and the right wheels, the planetary gear and the half axle gear teeth are not suitable to be produced. The general performance is clear “click, click” sound, serious, accompanied by a slight jitter phenomenon of drive axle. The diagnostic examination, can be on either side of the rear wheel brake, jack up the other side of the wheel, start the engine, gear, clutch, the differential has always played a differential effect, if the noise increased significantly, for differential ring.
Differential noise, if the noise is relatively small, and with the increase in mileage, sound gradually reduced, you can continue to use. If the noise is more and more serious, it should be resolved immediately, identify the cause, immediately ruled out.
4) bearing ring
Baotou North Benz accessories drive axle inner bearing ring is a very messy “squelch” sound, the faster the speed the greater the noise, and deceleration ring. This kind of noise is mostly caused by the improper adjustment of the bearing preload or the lack of oil. Usually should be resolved in a timely manner, inspection, shall not continue to use.
5) drive axle overheating
Drive axle overheating refers to driving a certain mileage, hand touching the bridge shell feel hot, and reached intolerable degree. (generally less than 60 degrees)
The main reason of overheating is that the pre tightening force of the bearing assembly is too large, and the clearance between the main and driven gears is too small and the lubricating oil is short.
6) differential lock is not working properly
Baotou North Benz accessories differential lock is not bad work, locking differential, differential is in the locked state; or the driver according to the operation procedure of locking differential, but differential differential effects on both sides of the wheel still again. This kind of fault is very harmful. When the differential can not be locked, the vehicle will slip on the road with less adhesion, and the ability of the vehicle to be reduced through the mud or snow road, which will not be able to benefit from the car. If you cannot restore the differential differential state, more serious consequences, steering in uneven road or road, on both sides of the wheels passing though the differential path length, but the two wheel is the same speed, will inevitably lead to the wheel wear, such as car high speed, heavy load driving, will cause serious damage to the internal axle parts of the. Therefore, in case of the above fault, should be immediately checked out.
Inspection methods are as follows:
1 check the difference between the wheel lock work
Parked the car on a flat surface, the top side of the front and rear wheel, the parking brake, emergency – (i.e. hand brake) control valve handle is in the driving position (i.e. brake release position), do not open the differential lock switch, the top side of the wheel by hand, should be free to turn otherwise, that wheel differential lock is in a locking state, should be excluded.
Start the engine, so that the pressure reached above 7 bars, open wheel differential switch, then rotate the top side of the front, rear wheel, wheel should not rotate, inspect the differential lock indicator should be shiny, these phenomena show that wheel wheel effective differential lock is in the locked state. Otherwise, the difference between the wheel and the lock can not be blocked, the reasons should be identified and excluded.
2 check the working condition of the bridge differential lock
The bridge and the rear bridge jacking control valve handle of the hand brake in the running position (i.e. brake release position), open wheel differential lock switch, the wheel differential lock is in a locking state, then turn the intermediate axle and the rear axle wheel, should be able to rotate freely, otherwise, that lock the mechanism can not lift the inter axle differential.
Start the engine, when the pressure reaches above 7 bars, open wheel, axle differential lock switch, and then turn the bridge or rear axle wheel should not rotate, otherwise, that bridge differential lock can lock action, should identify the reasons, be excluded.