Service Work
Position of rear wheel
Move to rear
Move forwards
3.10.4.2 Moving the sliders on the frame
The sliders can be moved continuously in a horizontal direction along the frame tube. To facilitate adjustment the
frame has a grid with 9 positions (see Fig. 186).
1) Remove the wheels.
2) Place the wheelchair upside down.
3) Loosen the 2 x 2 socket head screws on the sliders under the seat bottom (see Fig. 132, item 1).
4) Move the sliders with the axle unit to the desired position (see Fig. 132, item 2):
→ Use the grid as a rough guide (see Fig. 133, item 1).
→ For a more accurate guide, measure the distance between the end of the tube and the outer edge of the
slider (see Fig. 133, item 2).
5) Ensure that the depth setting is the same. Once changed, the left and right sliders must both have exactly the
same horizontal position on the frame.
6) Tighten the socket head screws to 10 Nm (see Fig. 132, item 1).
INFORMATION
Following adjustment the track of the rear wheel, the castor journal angle and the knee lever wheel lock must be
checked and, if necessary, readjusted (refer to the corresponding section).
3.10.4.3 Adjustment of the Sliders with Shock Absorber System
Adjustment is done in the same way as for sliders without a Shock Absorber System.
3.10.4.4 Adjusting the seat height and seat angle
The seat height and seat angle are changed through moving of the real wheel vertically in the slider (axle retainer).
This has the following effects:
42 | Ottobock
Effects
•
Larger wheelbase
•
Larger turning circle
•
Greater stability of the wheelchair
•
Wheelchair is harder to tip backwards when crossing obstacles
•
Position recommended for inexperienced users
•
Smaller wheelbase
•
Less load on castor wheels = greater manoeuvrability
•
Less stability of the wheelchair
•
Wheelchair is easier to tip backwards when crossing obstacles
NOTE: An anti-tipper can be installed if necessary.
•
Position recommended only for experienced users
132
133
Ventus