Küschall KSL User manual

Service Manual

3© Küschall AG,Switzerland | 04/2010
Service Manual
Contents
General ......................................................................................................................... 4
Introduction 4
Spare parts 4
Tipping point of the wheelchair 4
Fastening with hexagon socket bolts 4
Visual check 5
Identifying and repairing faults 5
Frame............................................................................................................................ 6
Adjusting the frame 6
Changing the frame 6
Seat ............................................................................................................................... 7
Adjusting the seat height 7
Replacing the seat cover 7
Backrest........................................................................................................................ 8
Backrest height 8
Backrest angle 8
Replacing the Standard Light backrest cover 8
Replacing Velcro® tapes for adjustable backrests 9
Replacing push handles with Light cover 10
Replacing push handles with adjustable backrest 10
Foldable backrest, angle adjustable (optional) 11
Footrests..................................................................................................................... 12
Replacing the footrest 12
Adjusting the height of the footrest 12
Adjusting the angle of the footrest 12
Sides ........................................................................................................................... 13
Fitting the clothes guard 13
Fitting the mudguard 13
Front wheels............................................................................................................... 14
Replacing the front wheel fork 14
Replacing the front wheel 14
Cleaning the front wheel bearings 15
Rear wheels ................................................................................................................ 16
Checking the tyre pressure 16
Checking the spoke tension 16
Checking that removable axles are seated correctly 16
Adjusting the removable axles 16
Replacing the rear wheels 17
Replacing the axle 17
Ensuring the rear wheels are parallel 17
Repairing or changing an inner tube 17
Fitting tubed tyres to carbon wheels 18
Brakes .........................................................................................................................19
Checking the parking brake 19
Fitting and adjusting the parking brake 19
Options & accessories ............................................................................................... 20
Fitting an antitipper 20

4© Küschall AG,Switzerland | 04/2010
Service Manual
General
Introduction
This Service Manual contains all the technical information necessary for the
inspection, conguration or repair of a Küschall® wheelchair.
To maintain the necessary levels of safety and reliability, every wheelchair
must be thoroughly examined once a year.
Some aspects of the assembly and conguration of the wheelchair require
a high level of expertise. These assembly instructions therefore break the
various tasks down into 3 categories:
Requirement Symbol
Easy – technical understanding required 0
Medium – technical knowledge required 00
Dicult – technical knowledge and expertise in
assembling wheelchairs required
000
Spare parts
All spare parts may be obtained from the Küschall customer ser-
vice department. An electronic spare parts catalogue can be found at
www.kueschall.com.
Tipping point of the wheelchair
The tipping point of the wheelchair can only be modied by tting a new
backrest with a larger or smaller backrest angle. The seat depth can also be
adjusted by changing the hole position.
Fastening with hexagon socket bolts
Hexagon socket bolts are not designed to withstand an excessive appli-
cation of force. When tightening or undoing a hexagon socket bolt, force
should be applied to the nut wherever possible to avoid damaging the bolt.
Tightening and undoing
Turn the nut using an open-end spanner, or preferably a socket span-
ner, using the Allen key simply to stop the bolt turning.
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.
LEnsure that the Allen key is of good quality and not worn.

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Service Manual
Visual check
Part of the regular maintenance of the wheelchair includes the following
visual checks:
Test all bolt connections
Check the entire frame for cracks, especially in the vicinity of joints and
weld seams (frame, axle clamp components, backrest)
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
The wheelchair tips too easily Frame geometry does not meet specications Fitting an antitipper
Backrest angle too great Replace backrest with smaller backrest angle
Removable axles cannot be
inserted correctly
Removable axles dirty Clean removable axles
Removable axles misaligned Adjust removable axles
The brakes are gripping poorly
or asymmetrically Incorrect tyre pressure in one or both rear tyres Correct tyre pressure
The rolling resistance is very
high
Tyre pressure in rear tyres is too low Correct tyre pressure
Rear wheels not parallel Ensure rear wheels are parallel
The front wheels wobble when
moving fast
Too little tension in front wheel bearing block Tighten the nut on the bearing block axle slightly
Front wheel has worn smooth Change front wheel
The front wheel is sti or stuck Bearings are dirty or faulty Clean or replace the bearings

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Service Manual
Frame
Frame
Adjusting the frame
The seat width, seat depth, lower leg length and tipping point are determi-
ned by the design of the frame and cannot be changed retrospectively.
A modication of the tip behaviour can only be achieved by ordering a new,
one-o backrest. The seat depth can be adjusted by changing the hole po-
sition.
Changing the frame
Please contact the Küschall customer service department if you wish to
change the frame.

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Service Manual
Seat
Seat
Adjusting the seat height
The seat height can only be adjusted by tting a larger or smaller rear wheel
and at the same time using a larger or smaller front wheel fork.
Possible front seat heights: SHv [cm] 50 51
As the seat angle is dictated by the design of the frame, the seat height rear
(SHh) also changes by 1cm.
The following settings are possible:
LTo ensure that the frame is straight and the axles of the front wheel forks are perpendicular to the ground, choose one of the
combinations listed in the table.
Replacing the seat cover
Diculty: 000 Tool: W8, Z3, Z4, Z5
Remove mudguard or clothes guard c.
Remove bolts don both sides of the seat cover.
Remove seat cover eand replace with new one.
LOwing to the tension inherent in the design of the frame, it may not be possible to t the seat cover. In this case the axle holders must be
undone.
Undo axle holders
Fit new seat cover eusing bolts d.
Ensure the rear wheels are parallel (see section entitled «Rear wheels»)
and tighten axle holder bolts.
Fit mudguard or clothes guard c.
Front seat height (SHv) according to front wheel
and rear wheel
SHv possible SHh Rear
wheel Frame Front wheel
3'' 4'' 5''
50 38 - 47 24‘‘ 75° D C B
90° B A --
51 39 - 47 25‘‘ 75° E D C
90° C B --
25''
24''
3'' 4'' 5''
A B C D E
75°90°
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Service Manual
Back
Backrest
Backrest height
The backrest module must be replaced if you want to alter the backrest
height.
Possible backrest heights:
RH [cm] 27 28.5 30 31.5 33 34.5 36 37.5 39
Backrest angle
If you want to change the backrest angle, then the complete backrest will
have to be replaced.
Possible backrest angles:
RW 74° 78° 82° 86° 90°
LChanging the backrest angle also modies the tipping point of the wheelchair.
Replacing the Standard Light backrest cover
Diculty: 0 Tool:
W8,Z3, X
Remove push handles, if tted (Replacing the push handles)
Remove bolts dande, clothes guard or mudguard.
Open the Velcro® fastenercon both sides.
Pull the backrest cover up and o and slip the new backrest cover over
the backrest tubes.
Close the Velcro® fasteners again on both sides.
Fit mudguard or clothes guard.
Fit push handles, if required.
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Service Manual
Back
Replacing Velcro® tapes for adjustable backrests
Diculty:000 Tool
W8, W10, Z3, Z4, Z5, X
The upper backrest bands can be taken straight o, the backrest must be
removed in order to access the lower ones.
Remove backrest cover.
Remove mudguard or clothes guard.
Push the backrest band down in order to access the bolts c. Remove
nuts and bolts on both sides.
Pull the push handle and end banddout of the backrest tube (if t-
ted).
Pull the upper backrest band eo the backrest tube f.
Remove bolts gon both sides.
Remove the seat cover, the bolts hon both sides and the backrest.
Replace the lower backrest band iand put the backrest to one side.
LOwing to the tension inherent in the design of the frame, it may be extremely dicult to reposition the backrest in the frame. In this case
the axle holders must also be undone.
Undo axle holders
Insert the new backrest and secure using bolts h.
Fit the seat cover, insert and tighten bolts g.
Ensure the rear wheels are parallel (see section entitled «Rear wheels»)
and tighten axle holder bolts.
Pull the upper backrest band eover the backrest tube f.
Ret the push handles and end band and secure using bolts c.
Fit mudguard or clothes guard.
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Service Manual
Back
Replacing push handles with Light cover
Diculty: 00 Tool:
Z3, Z4, X
Remove boltscon both sides.
Push the cover down a little to expose the bolt d. Remove bolt on both
sides.
Remove mudguard or clothes guard.
Pull out push handle and replace with new one.
Insert and tighten bolt don both sides.
Fit cover to both push handles using boltc.
LIf a push handle is not going to be tted, a new Light cover that is sealed at the top must be used.
Replacing push handles with adjustable backrest
Diculty: 00 Tool:
W8, Z3, Z4, X
Remove backrest cover c.
Remove bolts eand end bandd.
Push the backrest band fdown a little to expose the bolt h. Remove
nut and bolt on both sides.
Pull push handlegout of the backrest tube.
Slip end banddover the new push handle and secure in the desired
position using bolt h. Secure end banddwith bolt e.
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Service Manual
Back
Foldable backrest, angle adjustable (optional)
Optionally, a foldable, angle-adjustable backrest can be tted.
MFor assembling a special Küschall training is necessary.
LWhen switching to the foldable backrest, the axle of the rear wheels
must also be replaced with a new one that is 2 cm wider. à Rear
wheels section entitled, ‹Replacing the axle›
Pre-assembling the foldable backrest
Diculty: 00 Tool:
W8, W10, Z3, Z4, Z5
Push the back band conto the back tubes.
Fit the end plugs dinto the backrest tubes on both sides.
Mount the backrest joint plates eon both backrest tubes (9 Nm).
Fit the backrest angle adjustor fthrough the back band con both
backrest tubes facing forwards or backwards (4 Nm). Æ‹Backrest angle›
Fitting a foldable, angle-adjustable backrest
Diculty: 000 Tool:
W8, W10, Z3, Z4, Z5,
drill,
Uill bit: ø6.1
Remove mudguard or clothes guard from both sides.
Remove the seat cover.
Remove old backrest.
Drill a new hole cin the frame, on both sides, with ø 6.1 mm bit, at a
distance of 203 mm from the rearmost hole d.
Re-t the seat cover.
Push the seat tube einto the frame on both sides and secure with
bolt g(9 Nm).
Fit end plugs finto end of both seat tubes e.
Push the pre-assembled backrest onto seat tubes eand secure on
both sides with bolt h(9 Nm).
Secure support plate iusing bolt lthrough the seat cover
(9 Nm).
Secure support plate iusing bolt j(spacer, plastic washer, washer
if required, bolt) and plastic washer ein the required adjustor
position. Æ‹Backrest angle›
On both support plates, pull the strap through hole Dand make a
knot at both ends.
Position the mudguard or clothes-guard on the support plate and
drill at position E.
Screw the mudguard or clothes-guard onto the support plate
(7 Nm).
Backrest angle
The backrest angle adjustor can be tted ‹facing forwards› or ‹facing
backwards›:
Fitted ‹facing forwards› for seat angles 82, 86 and 90°.
Fitted ‹facing backwards› for seat angles 74 and 78°.
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Service Manual
Footrests
Footrests
Three types of footrest are available: A footrest in aluminium or titanium and
a footrest with an adjustable footplate.
LThe titanium footrest requires a dierent sleeve in order to secure it
in the frame.
Replacing the footrest
Diculty: 0 Tool
W8, Z4
Remove bolts con both sides.
Pull out footrest and replace with new one.
Insert the bolts cthrough the frame and into the nearest holes on
both sides and tighten them.
Adjusting the height of the footrest
Diculty: 0 Tool: Z4
The footrest can be adjusted in 1cm steps.
Remove bolts con both sides.
Move the footrest to the required height.
Insert the bolts cthrough the frame and into the nearest holes on
both sides and tighten them.
Adjusting the angle of the footrest
Diculty: 0 Tool:
Z3, W5, X
For option angle adjustable only.
Undo the four bolts cso that the footplate can be moved.
Move the footplate to the required angle and tighten the bolts cagain.
LThe bolts must be tightened very securely to prevent the footplate
from moving.
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Service Manual
Sides
Sides
Fitting the clothes guard
Diculty: 00 Tool:
Z5,drill,drillbit:ø5,2
LThe clothes guard is customised to t the geometry of the individual wheelchair. It should therefore only be replaced by another clothes
guard of the same size.
Remove bolts dand eand the old clothes guard c.
Use the old clothes guard as a template by placing it on the new one
and marking the position of the holes. Drill holes in the new clothes
guard.
Fit clothes guard using bolts dande.
Fitting the mudguard
Diculty: 00 Tool:
Z5,drill,drillbit:ø5,2
LThe mudguard is customised to t the geometry of the individual wheelchair. It should therefore only be replaced by another
mudguard of the same size.
Remove bolts dand eand the old mudguard c.
Use the old mudguard from the other side as a template by placing it
on the new one and marking the position of the holes. Drill holes in the
new mudguard.
Fit mudguard using bolts dande.
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Service Manual
Front wheels
Front wheels
Replacing the front wheel fork
Diculty: 0 Tool:
W8, Z6
Remove the sealing cap c. Do this by inserting two screwdrivers into
the notches and carefully prising the sealing cap out.
Remove nut dand washer g.
Remove the front wheel fork e.
Check bearings fand renew if necessary.
Insert new front wheel fork with washer gand nut d, tighten nut.
Fit sealing cap c.
Functional check
Tip the wheelchair backwards 90° so that it rests on the backrest and rear
wheels.
Turn the fork up (A) and allow it to fall down.
It is adjusted correctly if it just passes the lowest point and stops there (B).
If the fork moves back when in its lowest position (C), it has not been tighte-
ned enough. There is a risk that the front wheels will start to wobble when
travelling at high speeds.
Replacing the front wheel
Diculty: 0 Tool:
Z3, Z3
Remove bolts c, pull out wheel axle d.
Remove the front wheel eand replace with a new one or move to a
new position.
(In the case of the Starec wheel, Skater wheel, 3’’ sports wheel and the
5’’ soft roll wheel, 2 sleeves fmust be pushed onto the axle. These
sleeves are already in place on the low-resistance wheel, the sports
wheels and the pneumatic wheels.)
Replace the axle dand tighten bolt c.
Functional check
There must be no play in the wheel but it must turn easily.
A
B
C
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Service Manual
Front wheels
Cleaning the front wheel bearings
Check that the front wheels turn freely.
Remove any dirt or hair from the front wheel bearings.

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Rear wheels
Rear wheels
Checking the tyre pressure
Tyre Max. pressure
Low-resistance tyre 7 bar 700 kPa 101 psi
Treaded tyre (marathon) 7.5 bar 750 kPa 108 psi
Slick tyres (speed run) 10 bar 1000 kPa 145 psi
Mountain bike tyre 4 bar 400 kPa 58 psi
Tubed tyre, carbon wheel 14 bar 1400 kPa 202 psi
Measure the tyre pressure.
Inate the tyres to the required pressure.
Check the tyre tread. Change the tyres if necessary.
LThe air pressure in tubed tyres on carbon wheels must be not less than 10 bar in order to prevent damage to the carbon rim.
Checking the spoke tension
The spokes should not be loose or distorted.
Tighten any loose spokes with a suitable spoke spanner.
Replace broken or distorted spokes and check that the wheel is running
true.
Checking that removable axles are seated cor-
rectly
To check that a removable axle is seated correctly, grasp the rear wheel
by the hub and try to pull it o. You should not be able to pull it o and
it must only exhibit a very small amount of play.
If the rear wheels are not engaged properly, remove any dirt or
deposits. If the problem persists, adjust the removable axles.
Adjusting the removable axles
Diculty: 0 Tool:
W19, W11
Remove the rear wheel, adjust the removable axle slightly using 2
spanners and replace.
If there is too much play, shorten length L a little.
If the removable axle does not engage properly, extend the length L.
LThe adjustment must be carried out on both wheels. When neither removable axle exhibits any play, t the wheels on the other side of
the wheelchair. The axles are adjusted correctly if one of them now
exhibits a small amount of play.

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Service Manual
Rear wheels
Replacing the rear wheels
Diculty: 00
Proceed as follows if the rear wheels are replaced by ones of a dierent size
or with other tyres:
Check that the parking brakes are positioned correctly.
Check that the mudguard or clothes guard is positioned correctly.
Replacing the axle
Diculty: 000 Tool:
Z6, W22
Remove the wheels and unscrew bolts con both axle clamp
components.
Remove both axle clamp components and the axle.
Insert new axle, re-attach the axle clamp components and bolts c.
Tighten the bolts only slightly.
Ensure the wheels are parallel. Æ‹Ensuring the rear wheels are parallel›
Ensuring the rear wheels are parallel
Diculty: 00 Tool:
Z6, W22
The wheelchair will have ideal straight-line stability when the rear wheels
are exactly parallel to one another.
Place the wheelchair on a at, even surface.
Undo the bolts con the two axle clamp components.
At the level of the axle, measure the distance between the wheels at
the front (y) and back (x):
The distance at the front (y) should be precisely the same or up to 2mm
greater than the distance at the back (x). This dierence evens itself out
when someone sits in the wheelchair.
Once the wheels are aligned tighten bolts c(9 Nm).
Check that the wheels are parallel once again.
Check that the parking brakes are positioned and adjusted correctly.
Repairing or changing an inner tube
Diculty: 0 Tool:tyrelever
Remove the rear wheel and release any air from the inner tube.
Lift one tyre wall away from the rim using a bicycle tyre lever. Do not
use sharp objects such as a screwdriver which could damage the inner
tube.
Pull the inner tube out of the tyre
Repair the inner tube using a bicycle repair kit or, if necessary, replace
the tube.
Inate the tube slightly until it becomes round.
Insert the valve into the valve hole on the rim and place the tube inside
the tyre (the tube should lie right round the tyre with no creases).
Starting close to the valve, push the tyre wall over the edge of the rim
using both hands. When doing this, check all the way round to ensure
that the inner tube is not trapped between the tyre and the rim.
Inate the tube to its maximum operating pressure (see table at the
start of the Rear wheels section). Check that no air is escaping from the
tyre.
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Rear wheels
Fitting tubed tyres to carbon wheels
Diculty: 000
LTubed tyres must be attached to the rim using a special adhesive!
Carry out a test tting rst without using any adhesive.
Check the valve length, insert extension if necessary.
Recommendation: inate the tyres slightly before putting them on the
rim. This makes them easier to mount.
Apply an even coating of adhesive to the protective strip on the tyres
and allow to dry for at least 6 hours. (3)
If you have a new rim
Degrease the rim and roughen its base with ne sandpaper if required
(1).
Apply an even coating of adhesive to the rim (2) and allow to dry for at
least 6hours.
If you have a used rim
Check the existing layer of adhesive. An even and intact adhesive layer
can still be used. If the layer is very uneven, remove all adhesive from
the rim and apply a fresh layer of adhesive.
Apply a fresh layer of adhesive to the rim (2) and mount the tyre
immediately.
Mount the tyre.
Insert the valve. Pull the tyre down forcefully so that the nal part of the
tyre can be lifted easily and in a controlled manner over the edge of the
rim (4-7).
Inate the tyre a little and ensure it is centred. The edge of the
protective seam strip (8) can be used as a guide.
Inate the tyre to about 9 bar and use your full body weight to press
it on all round. Clean any excess adhesive from the braking surfaces of
the rim.
Important: Keep under pressure for 24 hours! Check tyre frequently.
MNever use tyres that have a damaged or loose protective strip.

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Service Manual
Brakes
Brakes
Checking the parking brake
Check that the parking brakes are positioned correctly.
The brake is set correctly if the brake shoe depresses the tyre by no
more than 4mm when the brake is applied.
(In the case of active brakes and standard brakes this will be the
case when the brake shoe is 25mm from the tyre when the brake is
released.)
Adjust the parking brakes if necessary.
Fitting and adjusting the parking brake
Diculty: 0 Tool:
Z4
MCAUTION! The parking brakes must be adjusted whenever the rear wheels are
replaced.
Check the air pressure in the rear wheels.
Fasten the brake holder to the frame using bolt c. Do not tighten the
bolt.
Push the brake dinto the brake holder and position it as required.
Tighten the bolts c.
LThe brake is set correctly if the brake rod presses into the tyre by no more than 4mm when the brake is applied. 2
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Options & accessories
Options & accessories
Fitting an antitipper
Diculty: 000 Tool:
Z5
Undo bolt cand remove the lower part of the axle holderd.
Secure the adapter bracketewith a bolt cand apply a low-strength
adhesive (e.g. Loctite 243). Max. torque: 9Nm
Fit antitipper to adapter brackete. Tighten bolts f.
Setting the height
Push in adjusting knobgand pull the antitipper tube to the required
position. Allow the adjusting knob to latch into one of the holes.
Measure the distance to the ground; it should be between 4 and 6 cm.
LFunctional check: The antitipper should be able to swing underneath the wheelchair without any diculty.
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