1. Remove the synchronizer from the secondary shaft (see «Repair of a secondary shaft of a transmission»).
2. Before disassembling the synchronizer, mark the position of the clutch 3 relative to the hub 1. Carefully disassemble the gearbox synchronizer by removing the clutch from the hub. Make sure that spring-loaded crackers 2 with balls do not scatter in different directions.
3. Inspect the synchronizer parts. Chips and nicks on the splines of the hub and coupling are unacceptable (especially pay attention to the ends of the teeth of the coupling). Damage or seizing marks on crackers, balls and springs are unacceptable. Replace defective parts or the transmission synchronizer assembly.
4. Install the coupling on the hub in accordance with the previously made marks.
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5. Three large grooves on the splines of the synchronizer sleeve must match the grooves of the hub for the clamps (with holes).
6. Lubricate the retainer spring with Litol-24 grease and insert it into the hole in the hub groove.
7. Lubricate the cracker with Litol-24 grease and insert a ball into its hole.
8. Compressing the spring, insert the cracker with the ball into the groove of the hub. grooves A on breadcrumbs should be outward, spherical (big) surface b - facing the synchronizer clutch.
9. Push the cracker so that the ball falls into the grooves on the splines of the synchronizer sleeve.
10. Adjust the spring with a screwdriver so that it gets into the cracker hole. Install the rest of the fasteners in the same way.