Assembly A: Frame; Replacing The Adjustment Tubes; Replacing The Adjustment Tubes On The Main Frame - Otto Bock Discovery tmax Service Manual

• Reversible ratchet handle wrench and sockets (size: 8 – 24)
• Torque wrench (measurement range 5 - 50 Nm)
• Wrench (size: 8 – 24)*
• Allen wrench (size: 2.5 – 6)**
• Screwdriver (blade width: 2.5/3.5/5 mm)
• Phillips head screwdriver (size: 2)
• Hammer (approx. 300 g); plastic hammer
• Pliers: cutting pliers, combination pliers, snap ring pliers
• Rivet gun (for rivets up to ø 5 mm)
• Pin punch, ø 3/4/5/6 mm
• Drill/twist drill ø 3.2/5/5.2/6 mm
• Stanley knife with sickle hooked blade and standard blade
• Tyre mounting levers and inner tube repair kit*
• Workbench and vice with plastic jaws and rubber insert
• Measurement equipment: rule, spirit level
• Liquid thread locker, "medium" and "strong"
* Included in the 481C08=ST010 Tool Set
** Size 3–6 included in the 481C08=ST010 Tool Set

3.5 Assembly A: Frame

3.5.1 Replacing the Adjustment Tubes

The adjustment tubes must be replaced in the course of retrofitting seat widths that cannot be achieved with the
installed adjustment tubes.
To simplify replacement, the main frame and seat frame adjustment tubes should be replaced at the same time.
This saves removing the seat frame from the main frame.
If the frame width is altered, the width of the push bar also has to be changed (see Page 11).
Existing seat plates must be removed in advance.

3.5.1.1 Replacing the Adjustment Tubes on the Main Frame

Article Number
471C22=SS021
471C22=SS022
471C22=SS023
471C22=SS024
* Seat width between the armrests, measured between the lateral guides of the armrest (lateral guides without optional seat
plates)
1) Loosen 4 x Allen head screws on each of the adjustment tubes at the rear (see Fig. 3, item 1) and front (see
Fig. 4, item 2).
INFORMATION: In some cases, the Allen head screws on the locking pedal also have to be loosened
(see Fig. 3, item 3).
2) Push the adjustment tubes to the side and replace them one by one.
3) Symmetrically preinstall the adjustment tubes in the desired width.
INFORMATION: The connection between the adjustment tube and frame always has to be realised on
both sides with 2 Allen head screws + washers (use inner 2 bores).
INFORMATION: If required, an asymmetry of 12.5 mm (1/2") is allowable when adapting the adjust­
ment tubes. The asymmetry must be on the same side on all adjustment tubes. However, the allow­
able adjustment range must not be exceeded.
4) Retighten all Allen head screws to a torque of 10 Nm.
discovery tmax
Adjustment Tube (for front/rear)*
Adjustment Tube for seat width 12"–16" / 30–40 cm
Adjustment Tube for seat width 14"–18" / 35–45 cm
Adjustment Tube for seat width 16"–20" / 40–50 cm
Adjustment Tube for seat width 18"–22" / 45–55 cm
Service Work
Quantity
2
2
2
2
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