Identifying And Repairing Faults - Küschall ULTRA-LIGHT Manual Del Usuario

Ultra-Light

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
The wheelchair is very difficult
to unfold
44
Possible cause
Incorrect tyre pressure on one rear wheel
One or more spokes broken
Spokes tightened unevenly
Front wheel bearings are dirty or damaged
Rear wheels are mounted too far forwards
Back angle too large
Seat angle too large
Incorrect tyre pressure in one or both rear tyres
Brake setting incorrect
Tyre pressure in rear tyres 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
Backrest cover is too tight
Action
Correct tyre pressure, ® 3.12 Tires, page 17
Replace faulty spoke(s), ® specialist dealer
Tighten loose spokes, ® specialist dealer
Clean or replace the bearings, ® specialist dealer
Mount the rear wheels further back, ® specialist dealer
Reduce the backrest angle, ® specialist dealer
Mount the adapter plate lower on the side profile,
® specialist dealer
Select a smaller front fork, ® specialist dealer
Correct tyre pressure, ® 3.12 Tires, page 17
Correct the brake setting, ® specialist dealer
Correct tyre pressure, ® 3.12 Tires, page 17
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
Loosen the Velcro bands of the backrest cover a little,
® 3.3 Backrest, page 11
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