Kuschall CHAMPION Service Manual - page 5
5
KÜSCHALL CHAMPION
© Küschall AG, Switzerland | 2013-12
Service Manual
Tightening and loosening if there is no nut
If an Allen screw is directly screwed into a screw thread, the screw must be tightened
using an Allen key.
i
Ensure that the Allen key is of good quality and
not worn.
Torque
All screw connections must be tightened with the torques specified in the following
instructions.
Checks
Visual check
Check the entire frame for cracks, especially the areas around joints and welded
seams.
Checking the screw connections
Check all bolts with the torques specified in the instructions
regularly, and adjust if
required.
CAUTION!
Several screw connections have been secured with safety seals. If these are opened,
they must be secured again using new safety seals.
High-power and low power adhesives are available. For torque entries notice shall be
made whether an adhesive and which adhesive needs to be used.
Identifying and alleviating malfunctions
Malfunction
Possible cause
Measure
The wheelchair will not
move in a straight line
Incorrect tire pressure in a rear wheel
Correct tire pressure
One or more spokes broken
Replace defective spoke(s)
Spokes unevenly tensioned
Tighten excessively loose spokes
Dirty or damaged wheel bearings
Clean or replace bearings
Bearing block of castor fork is not vertical
Align bearing block vertically
Front wheels not set to the same height
Position the front wheels in such a way
that they touch the ground at the same
time
Rear wheels not parallel or axes not aligned
Adjust the prestress load on the scissor
mechanism and/or the trail
The wheelchair tips
backwards too easily
Rear wheels have been fitted too far forward
Fit rear wheels further back
Backrest angle too great
Reduce backrest angle
Seat angle too great
Mount the adapter plate lower on the
side profile
Mount the smaller castor fork
The brakes engage poorly
or asymmetrically
Incorrect tire pressure in one or both rear wheels
Correct tire pressure
Brake setting incorrect
Correct brake setting
Roll resistance is too great
Insufficient tire pressure in the rear wheels
Correct tire pressure
Rear wheels are not parallel
Ensure that the rear wheels are parallel
(4° wheel camber)
The front wheels wobble
when moving fast
Insufficient tension in the front wheel bearings block
Lightly tighten the nut in the bearings
block axle
Front wheel is worn flat
Replace front wheel
The front wheel is stiff or
stuck
Dirty or damaged bearings
Clean or replace the bearings
The wheelchair is very
difficult to unfold
The backrestcover is too tight
Loosen the backrestbands a little
Handling seems imprecise
The scissor mechanism is not closed properly
If required, remove dirt from scissor
mechanism
The scissor mechanism is misaligned
Realign the scissor mechanism