6
KÜSCHALL
COMPACT
© Invacare Corporation | 2018-07
Service Manual
Tightening and undoing when no nut is present
If a hexagon socket bolt is screwed directly into a thread, the bolt must be tightened using
the Allen key.
i
Ensure that the Allen key is of good quality
and not worn.
Torque
All bolts must be tightened with the torque specified in the following instructions.
Checks
Visual check
Check all components for cracks, especially the areas around joints and welded seams.
Checking bolts and 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 specifications it
is pointed out whether an adhesive and which adhesive needs to be used.
Identifying and repairing faults
Fault
Possible cause
Action
The wheelchair does not
travel in a straight line
Incorrect tyre pressure on one rear wheel
Correct tyre pressure
One or more spokes broken
Replace broken spoke(s)
Spokes tightened unevenly
Tighten loose spokes
Front wheel bearings are dirty or damaged
Clean or replace the bearings
Support bearings in forks faulty
Replace the support bearings
Steering error or trail angle, left and right, uneven
Adjust steering error or trail angle
The wheelchair tips too
easily
Rear wheels are mounted too far forwards
Mount the rear wheels further back
Backrest angle too large
Reduce backrest angle
Seat angle too large
Mount the adapter plate lower on the side
profile
The brakes are gripping
poorly or asymmetrically
Incorrect tyre pressure in one or both rear tyres
Correct tyre pressure
Brake setting incorrect
Correct brake setting
The rolling resistance is
very high
Tyre pressure in rear tyres is too low
Correct tyre pressure
Rear wheels not parallel
Make rear wheels parallel
Drum brake set too narrow
Set the drum brake
Bearings are dirty or faulty
Replace the bearings
The front wheels wobble
when moving fast
Too little tension on the clevis pin housing
Tighten the nut on the front wheel fork
slightly
Front wheel has worn smooth
Replace front wheel
The front wheel is stiff or
stuck
Bearings are dirty or faulty
Replace the bearings
The wheelchair is very
difficult to unfold
The backrest cover is too tight
Loosen the topmost hook and loop band of
the backrest cover a little
Left and right side of the
wheelchair can be moved
in parallel to one another
Longitudinal stopping bolts on the seat edge are
loose
Tighten the longitudinal stopping bolts on
the seat edge
