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9.2 Identifying and repairing faults
Fault
Possible cause
Action
Incorrect tire pressure on one rear wheel
Correct tire pressure,
→
The wheelchair does not
travel in a straight line
Bearing block of the front wheel is not in a
vertical position
Put bearing block in a vertical position,
→
specialist
dealer
Front wheels not adjusted to same height
Position the front wheels such that they touch the
floor at the same time,
→
specialist dealer
One or more spokes broken
Replace faulty spoke(s),
→
specialist dealer
Spokes tightened unevenly
Tighten loose spokes,
→
specialist dealer
Front wheel bearings are dirty or damaged
Clean or replace the bearings,
→
specialist dealer
Rear wheels are off track
Change track,
→
specialist dealer
Rear wheels are mounted too far forwards
Mount the rear wheels further back,
→
specialist dealer
The wheelchair tips
backwards too easily
Back angle too large
Reduce the backrest angle,
→
specialist dealer
Seat angle too large
Use longer vertical struts,
→
specialist dealer
Incorrect tire pressure in one or both rear tires
Correct tire pressure,
→
The brakes are gripping
poorly or asymmetrically
Brake setting incorrect
Correct the brake setting,
→
specialist dealer
Tire pressure in rear tires is too low
Correct tire pressure,
→
Rolling resistance is very high
Rear wheels are off track
Change track,
→
specialist dealer
The front wheels wobble
when moving fast
Too little tension in front wheel bearing block
Tighten the nut on the bearing block axle slightly,
→
specialist dealer
Backrest cover is too tight
Loosen the Velcro bands of the backrest cover a little,
→
The wheelchair is very difficult
to unfold
Folding mechanism adjusted too hard
Adjust folding mechanism,
→
specialist dealer
1583536-C
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