STEP 4 (See Diagram 4)
A.) Slide one Butterfly Support Bracket (#10) onto the Right Butterfly (#9). Insert the Right Butterfly into the pivot on the Butterfly Support Frame (#13) from the bottom. Secure it with one ∅ 1 ½” Washer (#21), ∅ 1 3/8” Lock Ring (#57), M6 x 1 5/8” Hex Bolt (#76), and M6 Aircraft Nut (#85).
B.) Attach the Butterfly Arm Pad (#34) to the Right Butterfly. Secure it with two M8 x 2 ¾” Allen Bolts (#74) and ∅ 5/8” Washers (#82).
C.) Repeat steps A & B above to install the Left Butterfly (#8).
D.) Attach the Backrest Board (#31) to the Vertical Beam (#3). Secure it with two M8 x 3 ½” Allen Bolts (#73) and ∅ 5/8” Washers (#82).
DIAGRAM 4
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