
5
KÜSCHALL ADVANCE
© Küschall AG, Switzerland | 2015-09
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.
iEnsure 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 all components 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 thread locking adhesive. If these are
opened, they must be secured again using new thread locking adhesive.
Liquid high-strength and low-strength 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
Frames are not parallel Make the frames parallel
Frames and/or supporters are not vertical to the
ground Make the frames vertical
Alignment of the supporters is incorrect Correct the alignment of the supporters
Incorrect tire pressure in a rear wheel Correct tire pressure
One or more spokes broken Replace defective spoke(s)
Spoke unevenly tensioned Tighten excessively loose spokes
Dirty or damaged wheel bearings Clean or replace bearings
Footplate is not set to the same height on the left
and right, or the screws have come loose
Set the fooplate in the footplate guides
to the same height on both sides and
tighten the bolts.
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 Use longer vertical struts
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 Insucient tire pressure in the rear wheels Correct tire pressure
Rear wheels are not parallel Ensure that the rear wheels are parallel
The front wheels wobble
when moving fast
Insucient 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 sti or
stuck Dirty or damaged bearings Clean or replace the bearings
Increased forward tip
tendency Frame deformed Replace frame