Insert part (4) into part part (1) as per diagram. Using bolt (A) insert into part (1) to part (7) ,and using bolt (C) into part (1) to parts (3,5,6) with hex key (B) as per diagram. Note: do not fully tighten all the bolts .
Repeat the last action as per diagram. Fully tighten all the bolts .
Put part (9) to part (6) as per diagram.
Put part (8) as per diagram.