16.Press two 25mm x 40mm Inner Caps (28) into each Backrest Tube (27). Press two 25mm x 40mm Inner Caps into the Backrest Adjustment Bracket (35).
Lubricate an M10 x 190mm Bolt (22). Attach the Backrest Tubes (27) to the welded tube on the Backrest Adjustment Bracket (35) with the Bolt, two M10 Washers (6), and an M10 Nylon Locknut (11).
Make sure that the Backrest Tubes are turned as shown. The indicated holes are not centered in the Backrest Tubes but are closer to one side. Turn the Backrest Tubes so the holes are closer to the floor. Do not over tighten the Nylon Locknut; the Backrest Tubes must pivot easily.
17.Lubricate an M10 x 190mm Bolt (22). Attach the Backrest Tubes (27) to the welded tube on the Bench Frame (5) with the Bolt, two M10 Washers (6), and an M10 Nylon Locknut (11). Note: Do not over tighten the Nylon Locknut; the Backrest Tubes must pivot easily.
18. Attach the Backrest (15) to the Backrest Tubes (27) |
with four M6 x 55mm Screws (4) and four M6 |
Washers (30). |
19. See the inset drawing. Press the 20mm x 50mm Inner |
Cap (33) into the open end of the Seat Mounting |
Bracket (23). |
See the inset drawing. Lubricate an M8 x 70mm Bolt |
(41). Attach the Seat Adjustment Bracket (36) to the |
indicated side of the Seat Mounting Bracket (23) with |
the Bolt and an M8 Nylon Locknut (42). Note: Do not |
over tighten the Nylon Locknut; the Seat |
Adjustment Bracket must pivot easily. |
Place the Seat Mounting Bracket (23) on the Bench |
Frame (5) so that the Seat Adjustment Bracket (36) |
fits over the welded pin on the side of the Bench |
Frame. |
16 | Lubricate | 27 | 28 |
|
6
22 Holes 
|
| 11 |
|
| 6 |
28 |
| 35 |
|
| |
Welded | 28 | |
| Tube | |
|
| |
17 | Lubricate | |
| ||
| 6 |
|
22 |
|
|
| 27 | 6 |
Welded Tube | 11 | |
| 5 |
|
18 |
|
|
| 15 |
|
|
| 27 |
|
| 30 |
|
| 4 |
19 |
| 23 |
Lubricate | 36 |
|
Lubricate an M10 x 80mm Bolt (31). Attach the Seat |
Mounting Bracket (23) to the indicated bracket on the |
Bench Frame (5) with the Bolt and a M10 Nylon |
Locknut (11). Note: Do not over tighten the Nylon |
Locknut; the Seat Mounting Bracket must pivot |
easily. |
31
Welded
Pin 
5
11
Lubricate
36 23
41
33 42 
11