9.2 Identifying and repairing faults
Fault
Possible cause
Action
The wheelchair does not
travel in a straight line
Castor bearings are dirty or damaged
Clean the bearings or replace the castor,
→ qualified technician
The brakes are gripping
poorly or asymmetrically
Brake setting incorrect
Correct the brake setting, → qualified technician
Rolling resistance is very
high
Rear wheels not parallel
Ensure the rear wheels are parallel,
→ qualified technician
Too little tension in castor bearing block
Tighten the nut on the bearing block axle slightly,
→ qualified technician
The castors wobble when
moving fast
Castor has worn smooth
Change castor, → qualified technician
The castor is stiff or stuck
Bearings are dirty or faulty
Clean the bearings or replace the castor,
→ qualified technician
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