Changing The Wheelbase; Setting The Wheel Camber And Toe-In - Otto Bock Motus CV Instructions For Use Manual

6.2 Changing the wheelbase

Shifting the rear wheel backwards lengthens the wheelbase and thus provides for greater sta-
bility of the wheelchair. Shifting the rear wheel forwards relieves the load on the casters. This
increases the manoeuvrability 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 and remove the fitting. Shift the fitting to the de-
sired 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When changing the adjustments originally made in the factory, two other component groups of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 Setting the wheel camber and toe-in

The rear wheel adapter of the Motus allows for different camber angle settings of the rear
wheels . The greater the negative camber angle of the rear wheels, the more manoeuvrable the
wheelchair becomes.
The rear wheel adapter itself has a wheel camber of 0° or 2.5°, depending on the arrangement
of the wedge-shaped camber washers set at the factory. The wheel camber can be changed
by turning round the mounted camber washers. Proceed as follows:
First disassemble the nuts on the rear wheel fitting.
Motus CV/CS
37
Adjustment/Assembly instructions
Ottobock | 61