3.Press a 50mm Square Inner Cap (23) into the top of the Backrest Frame (3). Press a 50mm Square Angled Inner Cap (43) into the bottom of the Backrest Frame.
Attach the Adjustment Arm (7) to the Backrest Frame (3) with two M12 x 77mm Button Head Bolts (36), two M12 Washers (40), and two M12 Nylon Locknuts (47). Do not tighten the
Locknuts yet.
4.Attach the two Pop Pins (28), two Springs (29), two Threaded Collars (30), and two Adjustment Knobs (31) to the Frame (1).
Press two 50mm Square Inner Caps (23) into the Seat Frame (6). Do not press the indicated Cap all the way into the Frame; this Cap will be removed later.
Have a second person pull the upper Adjustment Knob (31) out as far as it will go. Engage the Pop Pin (28) into a hole in the Seat Frame (6).
Lubricate the M12 x 87mm Button Head Bolt (34) with grease. With the Adjustment Arm (7) under the welded rod, attach the Backrest Frame (3) and the Seat Frame (6) to the Frame (1) with the Bolt and an M12 Nylon Locknut (47). Do not overtighten the Locknut; the Backrest and Seat Frames must be able to pivot easily.
Pull the lower Adjustment Knob (31) out as far as it will go. Engage the Pop Pin (28) into the Adjustment Arm (7). Make sure the Pin is in the center of the hole in the Adjustment Arm. Tighten the two M12 Nylon Locknuts (not shown) used in step 3.
5.Attach the Backrest (4) to the Backrest Frame (3) with four M6 x 16mm Screws (38).
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