Adjusting The Rear Wheels; Adjusting Horizontal Position Of The Rear Wheels - Otto Bock Ventus Instructions For Use Manual

CAUTION
Unsecured screw connections
Risk of pinching, crushing, tipping over, falling of user
► After all adjusting/readjusting work, retighten the mounting screws/nuts firmly. Observe any torque settings
which may be specified.
► Any time you loosen a screw connection with thread lock, replace it with a new screw connection or secure
the old screw connection with medium strength thread locker (e.g. Loctite
CAUTION
Improper use of self-locking nuts
Risk of the user falling or tipping over
► Always replace self-locking nuts with new self-locking nuts after disassembly.
Fine adjustments and setting changes to match the concrete physical and mental condition of the user should
always be made in the user's presence.
All parts of the product should be cleaned thoroughly before adjustments are made.

6.2 Adjusting the Rear Wheels

CAUTION
Lack of fine adjustment of the rear wheel
Risk of falling or tipping of the user
► Check the standard adjustments of the wheelchair for stability against tipping and function of the rear wheels.
Avoid any extreme settings.
CAUTION
Incorrectly adjusted wheelbase
Risk of falling or tipping of the user
► Please note that with the rear wheel in the front position and with an unfavourable body position, the user may
tip backwards even on level ground.
► Use an anti-tipper for inexperienced users and with extreme settings of the rear wheel.
► Be sure to position the rear wheels towards the rear for transfemoral amputees. That improves the stability of
the wheelchair.
INFORMATION
Changing the rear wheel position can also change the angle between the front caster head and the ground.
However, this must be approx. 90°. The knee lever wheel lock also has to be readjusted.

6.2.1 Adjusting Horizontal Position of the Rear Wheels

The horizontal rear wheel position is changed by moving of the slider on the frame horizontally. This has the follow­
ing effects:
Position of rear wheel
Move to rear
Move forwards
Ventus
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
® 241).
Adjustments
Ottobock | 9