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Service work
4.14.9
Removing/installing the power back angle adjustment (VAS seat)
INFORMATION
The power back angle adjustment (VAS seat) requires a lower and a special upper connecting tube, and is repla-
ced together with these. The back angle adjustment actuator can be replaced separately (see Page 97).
When changing the back angle adjustment type (mechanical or power back angle adjustment), additional adjust-
ments such as additional control modules, new cabling or reprogramming the control unit may be required. Con-
tact your national Ottobock team before changing the back angle adjustment type.
Prerequisites:
Switch off the control unit and deactivate the main fuse (see Page 15).
Remove the seat cushion and back padding.
Tools: Allen wrench size 6; open-ended or ring wrench size 13; torque wrench with Allen insert size 6
Removing the power back angle adjustment (VAS seat)
1) Remove the cover from both bearing plates (see Page 91).
2) Remove the actuator for the power back angle adjustment (see Page 97) and fold the back forwards onto the
seat.
3) Loosen and remove the 4 screws and nuts on the upper connecting tube (see Fig. 201, item 1). Remove the seat
module (optional) as you do so (see Fig. 201, item 2; see Page 25).
4) Loosen the 2 clamping screws on the upper connecting tube on both sides (see Fig. 202, item 1).
5) Pull the inner tubes out of the upper connecting tube on both sides (see Fig. 202, item 2).
6) Remove the upper connecting tube. Remove the cable attachments if necessary (see Fig. 202, item 3).
7) Loosen and remove the 2 screws and nuts on the lower connecting tube on both sides (see Fig. 203, item 1).
8) Remove the lower connecting tube (see Fig. 203, item 2). Remove the cable attachments if necessary (see
Fig. 203, item 3).
9) Optional: Install the manual back angle adjustment (see Page 98).
Installing the power back angle adjustment (VAS seat)
1) Optional: Remove the manual back angle adjustment (see Page 98).
2) Set the lower connecting tube onto the bearing shields (see Fig. 203, item 2).
INFORMATION: If necessary, adapt the lower connecting tube to the frame width. To do so, use the
3)
them (see Fig. 203, item 1).
4) Insert the upper connecting tube and slide the inner tubes into the upper connecting tube on both sides (see
Fig. 202, item 2).
5)
Fig. 201, item 1). Attach the seat module (optional) as you do so (see Fig. 201, item 2; see Page 25).
6) Firmly tighten the 2 clamping screws on the upper connecting tube on both sides (see Fig. 202, item 1).
7) Reattach the loosened cable attachments (see Fig. 202/203, item 3).
8) Install the actuator for the power back angle adjustment (see Page 97).
9) Attach the cover for both bearing plates (see Page 91).
201
96 | Ottobock
202
490E75=0_C
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