Step 4:
4.1 Pull out the Inner Hexagon Pan Screw (29) and Spring Washer (660 from the Back Rest Frame Tube
(80), then lock the Back Cushion (65) into Back Rest Frame Tube (8) by using Inner Hexagon Pan
Screw (29) and Spring Washer (66).
4.2 Pull out Square Bolt (60), Flat Washer (40) and Nylon Nut (59) from Seat Bracket (7), then lock Seat
Bracket (70 into Seat Tube (5) by using Square Bolt (60) Flat Washer (40) and Nylon Nut (59).
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