Differential lock work bad what is the cause?

Differential lock bad refers to the work, there is no locking differential, differential in the locking state; Or driver locking differential according to operation procedure, but the differential wheel still back differential on both sides. The dangers of this kind of failure is very big. Differential can't lock when vehicles run on the small road adhesion will skid, car through the mud or snow and ice road capacity is reduced, don't play a car should be benefit. If he doesn't return differential differential state, more serious, car driving on the bumpy road and steering, although differential on both sides of the wheel through path length range, but the two wheels is the same speed, inevitably causes the wheel wear, such as automobile high speed, heavy load, will cause the axle serious damage to internal parts. In case of the failure, therefore, should check out immediately. Inspection methods are as follows: 1, check the wheel differential lock between work to park your car on a flat road, jacking before, during and on one side of the rear wheels, make emergency - The parking brake ( The hand brake) The control valve handle in the driving position, End the braking position) , do not open the differential lock switch, turn the jacking side by hand wheel, should be free rotation, otherwise, namely that between wheel differential lock in a blocking state, should be ruled out. Start the engine, make the air pressure reaches more than 7 bar, open the differential between the wheel switch, then rotate the jacking before, during and on one side of the rear wheel, should not turn, examined the differential between the wheel lock indicator light, should be shiny, these phenomena, showed that between rounds between effective differential lock in the blocking state. Otherwise, that is, between wheel differential lock not blocking effect, should find out the reason, be ruled out. 2, check the bridge condition will intermediate axle and rear axle differential lock work between jacking, will hand brake control valve handle in the driving position, End the braking position) , open differential lock switch between wheel and the wheel between differential lock in a blocking state, and then turn the intermediate axle and rear axle by hand wheel, should be free rotation, otherwise, namely that bridge between differential locking mechanism cannot remove. Start the engine, and when the pressure reaches 7 above, open between wheel and bridge between the differential lock switch, then turn the intermediate axle and rear axle wheels, should not turn, otherwise, namely that bridge between differential lock cannot be locked-in effect, should find out the reason, be ruled out. Relevant tags: semi-trailer axle