Changing The Wheelbase - Ottobock M1 Intro Gebrauchsanweisung

Adjustment / assembly instructions
B
6.2 Changing the wheelbase (Fig� 47/48)
Shifting the rear wheels backwards lengthens the wheelbase and thus provides for greater
stability of the wheelchair. Attaching the rear wheels in a more forward position (only for ad-
vanced wheelchair users!) reduces the load on the casters, which makes the wheelchair more
manoeuvrable. The caster wheels can then also be lifted more easily to clear obstacles such
as curbs or steps.
Start M1 Intro, M2 Effect, M3 Hemi and M6 Junior: Loosen the two screws of the rear wheel
adapter, turn it round and mount the rear wheel adapter in the desired front/back position
(Fig. 47/45). The setting must always be equal on both sides.
Start M4 XXL and M5 Comfort: Loosen the nut of the fitting on the inside of the rear wheel
adapter and mount the fitting in the desired more forward/backward position (Fig. 48). The set-
ting must always be equal on both sides.
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When changing the adjustments originally made in the factory, two other assemblies of the
wheelchair must be readjusted, refer to Sections 6.4 and 6.5.
CAUTION
Risk of tipping. Please note: If the rear wheels are in a more forward position and the user's body is
not appropriately positioned, the user may tip backward – even on level ground!
CAUTION
Risk of tipping. For untrained wheelchair users and when there are extreme adjustments to the rear
wheel, an anti-tipper is strongly recommended.
CAUTION
Risk of tipping. For transfemoral amputees it is essential to shift the rear wheels backwards!
INFORMATION
Make sure to firmly retighten all screws and nuts after making adjustments. The proper torque for the
screw connection A of the rear wheel adapter is 10 Nm and for the screw connection B of the fitting
50 Nm (see Fig. 47/48).
72 | Ottobock
A
45
M1 Intro · M2 Effect · M3 Hemi · M4 XXL · M5 Comfort · M6 Junior · Asia
C
46