FAW Auxiliary Case Synchronizer Assembly 1701550-FA0L

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FAW Auxiliary Case Synchronizer Assembly 1701550-FA0L

The auxiliary gearbox synchronizer assembly is located in the auxiliary gearbox (high and low gear zone) and is the core component of the 12-speed transmission for switching between high and low gears (i.e., between gears 9-12 and 1-8).

FUNCTION

1. Synchronizing Speed ​​Differences Between High and Low Gears: When shifting from a low gear range (1-8) to a high gear range (9-12), or vice versa, the synchronizer generates friction through the friction cone ring, quickly synchronizing the speeds of the input and output shafts of the auxiliary gearbox. This eliminates speed differences and prevents gear impact, grinding, abnormal noise, or inability to engage gears during direct shifting.

2. Achieving a Fully Synchronized 12-Gear Shifting Structure: The FAW Jiefang 12TA gearbox employs a composite structure of "5 gears in the main gearbox × 2 high and low gears in the auxiliary gearbox," totaling 12 forward gears + 2 reverse gears. The auxiliary gearbox synchronizer acts as a "bridge" for high and low gear shifting, ensuring perfect matching between the main gearbox output speed and the auxiliary gearbox planetary gear set or direct drive gear set.

3. Withstanding High Torque Impacts and Durable Load Bearing: Matched with FAW Jiefang heavy-duty truck engines with high horsepower, the synchronizer withstands enormous torque impacts during shifting. Energy is absorbed through a high-strength cone ring + slider + spring + gear sleeve structure, preventing gear damage. The friction cone ring is made of copper-based or reinforced paper-based materials, offering a stable coefficient of friction, good heat dissipation, and strong wear resistance.

4. Assists in smooth shifting and reduces driver fatigue: Shortens shifting time, reduces the impact of shifting shocks on the overall lifespan of the transmission, and extends the service life of main/auxiliary gearbox gears, bearings, and other components.

DETAILS

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