Identifying And Repairing Faults - Invacare KÜSCHALL ADVANCE Manual Del Usuario

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9.2 Identifying and repairing faults

Fault
The wheelchair does not
travel in a straight line
The wheelchair tips
backwards too easily
The brakes are gripping
poorly or asymmetrically
Rolling resistance is very high
The front wheels wobble
when moving fast
The front wheel is stiff or
stuck
Carbon fibres are sticking out
Front frame wobbles (option,
quick release frame)
40
Possible cause
Incorrect tire pressure on one rear wheel
One or more spokes broken
Spokes tightened unevenly
Front wheel bearings are dirty or damaged
Front wheel supporter is not aligned correctly
Rear wheels are mounted too far forwards
Back angle too large
Seat angle too large
Incorrect tire pressure in one or both rear tires
Brake setting incorrect
Tire pressure in rear tires is too low
Rear wheels not parallel
Too little tension in front wheel bearing block
Front wheel has worn smooth
Bearings are dirty or faulty
Overstress or damage of material
Loss of clamping force due to loose quick
release clamps
Action
Correct tire pressure, ® 3.13 Tires, page 19
Replace faulty spoke(s), ® specialist dealer
Tighten loose spokes, ® specialist dealer
Clean or replace the bearings, ® specialist dealer
Correct position and alignment of front wheel
supporter,
® specialist dealer
Mount the rear wheels further back, ® specialist dealer
Reduce the backrest angle, ® specialist dealer
Use longer vertical struts, ® specialist dealer
Correct tire pressure, ® 3.13 Tires, page 19
Correct the brake setting, ® specialist dealer
Correct tire pressure, ® 3.13 Tires, page 19
Ensure the rear wheels are parallel, ® specialist dealer
Tighten the nut on the bearing block axle slightly,
® specialist dealer
Change front wheel, ® specialist dealer
Clean or replace the bearings, ® specialist dealer
Smooth with grinding paper (grit 80) or contact
specialist dealer
Readjust quick release device, ® specialist dealer
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