Changing The Wheelbase; Caster Trailing Adjustment - Otto Bock Motus Bedienungsanleitung

6.2 Changing the Wheelbase (Fig. 34)
Shifting the rear wheel backwards lengthens the wheelbase and thus provides for greater sta-
bility of the wheelchair. Shifting the rear wheel forwards (only for advanced wheelchair drivers!)
relieves the load on the casters. This increases the maneuverability of the wheelchair. The caster
wheels can then also be lifted more easily to clear obstacles such as curbs or steps.
Loosen the screw connections from the fitting (fig. 34, see arrow) and remove the fitting. Shift
the fitting to the desired position and firmly retighten the screws.
The distance between rear wheel and side panel can be continuously adjusted by adjusting the
counter nut on the outer side of the rear wheel adapter.
When changing the adjustments originally made in the factory, two other component groups of
the wheelchair must be readjusted, refer to Chapters 6.3 and 6.4.
Risk of tipping� Please note: If the rear wheels are in a more forward position and the
CAUTION
user's body is not appropriately positioned, the user may tip backward - even on level ground!
Risk of tipping� For untrained wheelchair users and when there are extreme adjust-
CAUTION
ments to the rear wheel, an anti-tipper is strongly recommended!
Risk of tipping� For transfemoral amputees it is essential to shift the rear wheels back-
CAUTION
wards!
Make sure to firmly retighten all screws and nuts after making adjustments. The proper
INfORMATION
torque for the screw connection of the rear wheel adapter is 8 Nm. The proper torque for the
screw connection of the fitting is 50 Nm�
6.3 Caster Trailing Adjustment (Fig. 35-38)
After the rear wheels have been mounted in the appropriate position, the caster wheel journal
angle must be readjusted. The threaded axle should be as horizontal as possible in relation to
the ground to ensure optimal driving behavior of the wheelchair. The caster adapter allows for
continuous angle adjustment.
Remove the cap from caster head bearing with a screwdriver (fig. 35). Then remove the protec-
tive cap from the screw connection on the frame inner side (fig. 36).
Loosen the rear screw connection as shown in fig. 37.
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34