Front seat adjustment mechanisms
1 - screw for adjusting the backrest; 2 - slide latch handle; 3 - slide guides; 4 - sled sliders; 5 - cotter pin; 6 - backrest reinforcement; 7 - balls; 8 - roller; 9 - spring
Perform disassembly and assembly of mechanisms on the removed seats.
Movement mechanism
1. Bend the edges of sliders 4 and slide guides 3, remove all balls 7 and slide the guides relative to the sliders until the rollers 8 come out.
2. For assembly, insert the rollers 8 into the groove of the slider and slide the guide. Then insert the balls and bend the rims.
Backrest adjustment mechanism
3. Disconnect the spring 9 from the rod and knock out the pin. Remove cotter pin 5 and unscrew the rod (thread left). Remove the rod from the bracket.
4. Assemble the mechanism in reverse order.