Küschal ULTRA-LIGHT Manual Del Usuario página 55

Fault
The parking 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
1583566-D
Possible cause
Incorrect tire pressure in one or both rear
tires
Parking brake setting incorrect
Tire pressure in rear tires is too low
Tire is punctured
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 tire pressure, ® 3.14 Tires, page 22
Correct the parking brake setting, ® specialist
dealer
Correct tire pressure or replace the tube inside
the tire, ® 3.14 Tires, page 22
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 hook and loop straps of the backrest
cover a little, ® 3.3 Backrest, page 14
Troubleshooting
55