Wheels; Inspecting The General Condition; Replacing The Casing Or Inner Tube Of Pneumatic Tyres - Otto Bock B400 Service Manual

6.7 Wheels

CAUTION
Risk of accident as a result of bald or defective tyres. Wheels with PU tyres must be replaced if the
material shows signs of cracking or damage, or when the tread becomes worn down to such an extent
that there is only  mm of radius left on the outer edges of the tyre.
Replace the casing of pneumatic tyres if it is bald or shows signs of cracking or other damage.
The B00 power wheelchair has two 1" rear wheels that perform the function of driving and
two front wheels (casters) that perform the function of steering. The B00 power wheelchair
has 9" casters.

6.7.1 Inspecting the General Condition

INfORMATION
Direct sunlight (UV light) causes the tyres to age prematurely. As a result, the tread surface hardens
and corner pieces break out of the tread.
INfORMATION
Whenever possible, avoid parking the wheelchair outdoors. Regardless of wear and tear, the tyres
should be replaced every 2 years.
When the wheelchair is not used for extended periods of time, or if the tyres are heated strongly (e.g.
near radiators or by sunlight shining through a window), permanent deformation of the tyres will result.
Therefore always make sure that the wheelchair has sufficient distance from sources of heat, move
your wheelchair from time to time, or jack up the wheelchair when storing it.
Steps:
1. Check the condition of the tyres with regard to tread, porosity, and cracking.

6.7.2 Replacing the Casing or Inner Tube of Pneumatic Tyres

Both, the casters and drive wheels, have two-piece rims which can be separated by removing
the Allen head screws.
Tools:
Plastic tyre mounting levers
❒
Inner tube repair kit
❒
Allen wrench, size  mm
❒
Steps:
1. Let the air out of the tyre.
2. Loosen all five Allen head screws.
3. Separate the two parts of the rim from each other.
. Lever the casing over the wheel rim.
. Push the valve inside the rim and pull out the inner tube.
. Repair the inner tube with a standard bicycle repair kit or replace it.
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