2. When replacing synchronizer rings, it is recommended to install new synchronizer crackers and springs that support the crackers in the synchronizer hubs. Leaving the old crackers causes the synchronizer to start working with gaps between the worn cracker and the new synchronizer ring.
3. The synchronizer rings must be checked by placing them on the cone of the corresponding toothed gear (photo 6.4)
If the gap between the synchronizer ring and the gear is less than 0.5 mm, then the ring must be replaced (photo 6.5).
4. Before disassembling the synchronizer unit, it is necessary to mark the relative position of the hub and the movable gear relative to the other, and then move the hub out of the movable gear and remove the spring crackers.
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5. Check the elements and then slide them onto the hub so that the markings on them match. It should be noted that the largest flattening visible on the internal teeth of the movable gear should match the grooves of the crackers in the hub. The external teeth of the synchronizer hub are separated by a channel on the perimeter of the hub. When installing, it is necessary to install the hub so that:
- on the input shaft, a factory-marked point on the movable gear (if any) was located above the longer part of the hub tooth,
- on the output shaft, the fork groove ended up above the longer part of the hub tooth.
Note: To avoid difficulties during installation, it is recommended to mark the position of the cracker in relation to the hub and the hub in relation to the shaft with quick-drying paint. Install the crackers and put on the support rings, inserting the bent ends into the crackers (photo 6.8 and 6.9).
The bent ends of the rings supporting the crackers on both sides of the hub should form an angle of 120.
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