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What is the reason for the failure of high and low speed switching in Fast gearbox?

1 Answers

LeElijah

07/30/25 4:51am

If there is no high gear start and the operation is correct, then it is necessary to carefully check the air pressure, air pipe, pre-selection valve, shifting cylinder, auxiliary box shifting fork, auxiliary box synchronizer, auxiliary box driving gear. If there are no other problems, you don't need to consider them. First, consider the shifting cylinder and fuel tank synchronizer. Additional information: It is recommended to switch between high and low gears only between 4th and 5th gears. Skipping gears to switch between high and low gears will cause severe wear of the auxiliary box synchronizer and lead to faults. When parking, it is only allowed to park the vehicle in the neutral position of the low gear area, that is, the shifting head on the side of the gear lever faces downward. It is strictly prohibited to park and shut down the vehicle in the neutral position of the high gear area, otherwise it may cause serious faults.

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