Kuschall Advance Service Manual - Service Manual
5
© Küschall AG, Switzerland | 2013-01
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
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
Insufficient 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
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
Increased forward tip
tendency
Frame deformed
Replace frame