The high and low speed shift gear of the transmission auxiliary box is operated by the double H air inlet valve, the shift cylinder piston works, and then the synchronizer is meshed by the synchronizer. Each transform a high, low, synchronizer work once, of course, wear once. Synchronizer work is life, if used improperly, is bound to cause early damage to the synchronizer, resulting in transmission gear shift difficult.
Secondary box synchronizer damage mainly in the following aspects:
(1) Baotou beiben heavy truck parts clutch brake failure. Clutch brake is the starting synchronizer. When the clutch pedal, and the pedal, clutch pedal arm will clutch brake control valve open, compressed air into the clutch brake valve, the piston to the transmission countershaft gear brake. The brake surface of the piston depends on the end face of the brake gear, and the two causes friction. Because at this time the transmission gear and shaft is running by inertia, produce braking, soon stop not turn, reached the driver started hanging file rapid purpose. If the clutch brake failure, gear and shaft by inertia is still running, forced to hang into the low gear, will cause the synchronization of the box synchronizer synchronization, meshing is not ideal, synchronizer working time is long, wear increased.
(2) Baotou beiben heavy truck parts shift cylinder sealing ring and piston rupture. Shift cylinder seal damage, can not be replaced in low gear or high speed, and leakage. If the leakage is not serious, shift can barely be replaced. Due to gas leakage, inadequate thrust piston, piston drives the shift fork shaft, gear shift fork, sliding forward and back, lack of strength, long time synchronizer, wear increase.
(3) the transmission oil is not enough, lubrication is not good, resulting in the increase of early wear of synchronizer.
(4) the lubricating oil in the transmission is deteriorated and the lubricating effect is bad, which causes the synchronizer to wear.
(5) operational issues. If the driver frequent high and low conversion, is bound to increase the number of synchronizer work, resulting in increased wear. The correct operation can prolong the service life of the synchronizer, that is to say, the vehicle is running to minimize unnecessary high and low conversion. The proper choice of the road, do good, quick, reduce unnecessary change gear, exhaust brake control is saving, effective way of reducing the wear of parts.
(6) the use of Baotou beiben heavy truck accessories improper clutch brake. If the clutch pedal without causing the clutch pedal, brake valve does not work, then forced the gear start; in normal operation will be the separation of the clutch pedal, will cause the increase of synchronizer wear and damage. The correct operation is to start the clutch pedal in the end, so that the clutch brake effect, so smooth and rapid stall start. Vehicles in operation, master the clutch pedal free travel, in the free travel meet the standard, step on the clutch pedal, encountered a strong hard point on it. In short, reasonable and correct operation, can reduce the mechanical damage and wear.