Otto Bock Ventus User manual

Ventus
Instructions for use (qualified personnel) ................................................................. 3

2 | Ottobock Ventus

Foreword1 5..............................................................................................................................................................
Application2 5...........................................................................................................................................................
Indications for use2.1 5................................................................................................................................
Indications2.2 5...........................................................................................................................................
Contraindications2.3 5.................................................................................................................................
Qualification2.4 6.........................................................................................................................................
Safety3 6....................................................................................................................................................................
Explanation of warning symbols3.1 6..............................................................................................................
General safety instructions3.2 6.....................................................................................................................
Safety Instructions for Assembly3.3 6.............................................................................................................
Nameplate3.4 7...........................................................................................................................................
Delivery4 7.................................................................................................................................................................
Scope of delivery4.1 7..................................................................................................................................
Options4.2 7...............................................................................................................................................
Storage4.3 8...............................................................................................................................................
Preparation for use5 8.............................................................................................................................................
Assembly5.1 8.............................................................................................................................................
Settings6 8................................................................................................................................................................
Prerequisites6.1 8........................................................................................................................................
Adjusting the Rear Wheels6.2 9.....................................................................................................................
Adjusting the horizontal position of the rear wheels6.2.1 9...................................................................................
Adjusting the sliders on the frame6.2.1.1 10.........................................................................................................
Adjusting sliders with shock absorber system6.2.1.2 10.........................................................................................
Adjusting the seat height and seat angle6.2.2 10................................................................................................
Adjusting the height of the rear wheels6.2.2.1 11..................................................................................................
Adjusting the height of the rear wheels in the shock absorber system6.2.2.2 11........................................................
Adjusting the Track Width (additional adjustment)6.2.3 12...................................................................................
Adjusting the Rear Wheel Camber6.2.4 13........................................................................................................
Adjusting the 0°/3°/6°/9° rear wheel camber6.2.4.1 13..........................................................................................
Adjusting the Track6.2.5 15.............................................................................................................................
Adjustments in the case of a wheelbase extension6.2.6 15...................................................................................
Adjusting the caster wheels6.3 17..................................................................................................................
Adjusting the Caster Wheel Journal Angle6.3.1 17..............................................................................................
Changing the Installation Position of the Caster Wheels6.3.2 18..........................................................................
Adjusting the brakes6.4 19............................................................................................................................
Adjusting the wheel locks6.4.1 19.....................................................................................................................
Adjusting the Back6.5 21..............................................................................................................................
Adjusting the Back Height6.5.1 21....................................................................................................................
Adjusting the back angle6.5.2 21......................................................................................................................
Adjusting the push handles6.5.3 22..................................................................................................................
Adjusting the Back/Seat Upholstery6.6 22......................................................................................................
Adjusting the Back Upholstery6.6.1 22..............................................................................................................
Adjusting the Seat Upholstery6.6.2 23...............................................................................................................
Adjusting the footrests6.7 24.........................................................................................................................
Adjusting the Lower Leg Length6.7.1 24...........................................................................................................
Adjusting the Support Angle6.7.2 24.................................................................................................................
Installing/adjusting the lateral heel block6.7.3 25................................................................................................
Adjusting the Side Panels6.8 25....................................................................................................................
Adjusting the "height-adjustable" armrest6.8.1 25...............................................................................................
Adjusting the "padded" armrest6.8.2 26............................................................................................................
Adjusting the "Standard" and "Clothing Protector" Side Panels6.8.3 26................................................................
Mounting/adjusting the channel forearm pad with swivel unit6.8.4 27....................................................................
Table of contents
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Table of contents

Installing / adjusting the anti-tipper and tip-assist6.9 27....................................................................................
Installing the accessory mount6.9.1 27..............................................................................................................
Installing the anti-tipper6.9.2 28........................................................................................................................
Adjusting the Anti-Tipper6.9.3 28......................................................................................................................
Installing/adjusting the tip-assist6.9.4 29...........................................................................................................
Installing and adjusting the safety belt6.10 29....................................................................................................
Installing/adjusting the headrests and neckrests6.11 30.....................................................................................
Delivery7 30...............................................................................................................................................................
Final inspection7.1 30..................................................................................................................................
Transport to the customer7.2 30....................................................................................................................
Handing over the product7.3 30.....................................................................................................................
Maintenance and repair8 30...................................................................................................................................
Disposal9 30.............................................................................................................................................................
Disposal Information9.1 30............................................................................................................................
Information on Re-use9.2 31..........................................................................................................................
Legal information10 31..............................................................................................................................................
Liability10.1 31..............................................................................................................................................
CE Conformity10.2 31....................................................................................................................................
Warranty10.3 31............................................................................................................................................
Service Life10.4 31........................................................................................................................................
Trademarks10.5 31........................................................................................................................................
Appendices11 32........................................................................................................................................................
Technical data11.1 32....................................................................................................................................
Required Tools11.2 36...................................................................................................................................
Torque values of the screw connections11.3 37.................................................................................................
4 | Ottobock Ventus
Table of contents

1 Foreword
INFORMATION
Last update: 2016-02-08
►Please read this document carefully before using the product.
►Follow the safety instructions to avoid injuries and damage to the product.
►Instruct the user in the proper and safe use of the product.
►Please keep this document in a safe place.
INFORMATION
►New information regarding product safety and product recalls can be obtained from the Customer Care Cen
ter (CCC) at [email protected] or from the manufacturer's service department (see inside back cover or back
page for addresses).
►You can request this document as a PDF file from the Customer Care Center (CCC) at [email protected] or
from the manufacturer's service department (see inside back cover or back page for addresses). It is possible
to increase the display size of the PDF document.
Initial adjustments to the product were made according to the order form. Nevertheless, fine adjustment may be
required and settings may have to be made according to the medical conditions or the user's requirements.
These instructions for use provide the information necessary for adjusting the settings. This work should be closely
coordinated with the user.
Please note the following:
• The instructions for use (qualified personnel) are intended only for qualified personnel and remain with them.
• The operation of the product and functionality of the options are described in the instructions for use (user).
These instructions for use must be given to the user.
• The manufacturer recommends checking the product settings regularly in order to assure an optimum fit over
the long term. A review is required every six months for children and youths in particular.
• The installation and retrofitting of all optional components are generally described in the service manual.
2 Application
2.1 Indications for use
The wheelchair is intended solely for everyday indoor and outdoor use by people who are unable to walk or have a
walking impediment and can be operated by the patient or another person.
The wheelchair may only be used with the options listed in the product order form.
Ottobock assumes no liability for combinations with medical devices and/or accessories from other manufacturers
not included in the modular system.
2.2 Indications
The broad range of equipment options and the modular design allow the product to be used by people who are
unable to walk or have a walking impediment, for example due to:
• Paralysis (paraplegia, tetraplegia)
• Loss of limbs (leg amputation)
• Defects or deformation of the limbs
• Joint contractures or damage
• Neurological and muscular diseases
• Disorders such as cardiac or circulatory insufficiency, balance disorders or cachexia as well as geriatric
patients who still have usable residual strength in the upper limbs.
The wheelchair was designed in particular for individuals who are generally able to move around actively and
freely in the wheelchair.
2.3 Contraindications
In view of the wide variety of setting options (e.g. active/passive settings), this wheelchair type is suitable for all
user groups.
In certain versions and with certain settings, however, the wheelchair tends to tip backwards due to its design.
This is an intentional feature designed to enable users with the corresponding physical prerequisites to manoeuvre
Ottobock | 5Ventus
Foreword

quickly and nimbly. Users lacking the necessary physical or psychological prerequisites must not be supplied with
such versions/settings.
Due to its dimensions, this wheelchair type should not be used for small children.
2.4 Qualification
The installation and adjustments described below may only be carried out by qualified personnel.
3 Safety
3.1 Explanation of warning symbols
WARNING Warning regarding possible serious risks of accident or injury.
CAUTION Warning regarding possible risks of accident or injury.
NOTICE Warning regarding possible technical damage.
3.2 General safety instructions
WARNING
Lack of instruction
Tipping over, falling of the user due to lack of knowledge
►Instruct the user or the attendant in the proper use of the product when handing it over.
CAUTION
Use of unsuitable tools
Pinching, crushing or damaging the product due to use of unsuitable tools
►When completing the tasks, only use tools that are suitable for the conditions at the place of work and for
which safety and the protection of health are assured with proper use.
►Observe the specifications in the section "Required Tools".
NOTICE
Tipping or falling of the product
Damage to product due to lack of attachment
►When you work on the product, secure it so that it cannot tip over or fall over.
►Use a clamping fixture to secure the product whenever you work on it at a workbench.
NOTICE
Use of unsuitable packaging
Damage to the product caused by transportation using incorrect packaging
►Use only the original packaging for delivery of the product.
3.3 Safety Instructions for Assembly
WARNING
Changed diameter/installation position of the wheels
Tipping, falling over of the user due to blocked wheels
►Modification of the size and position of the front wheels and of the rear wheel size can lead to wobbling of the
front wheels at higher speeds. If changes are required, verify the horizontal alignment of the wheelchair frame
(see the section "Adjusting the rear wheels", "Adjusting the caster wheels").
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Safety
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WARNING
Incorrect installation of the anti-tipper/missing anti-tipper
Tipping over, falling of the user due to failure to observe the installation instructions and because of incorrect
adjustment
►Depending upon the settings of the chassis, the centre of gravity, the back angle and the experience of the
user, the use of an anti-tipper may be necessary.
►For a small wheelbase and a backrest that is tilted far back, an anti-tipper may need to be installed on both
sides, depending upon the user's experience.
►Verify that the anti-tipper has been installed and adjusted properly. Find the appropriate position with the
assistance of a helper.
CAUTION
Incorrect fitting of the rear wheels
Tipping, falling over of the user due to wheels coming off
►After each assembly, verify the proper fit of the rear wheels. The quick-release axles must be firmly locked in
the wheel attachment.
3.4 Nameplate
Label Meaning
AType designation
BManufacturer article number
CMaximum load capacity (see section "Technical Data")
DManufacturer information, address, country of origin
ESerial number/manufacturing date
FEuropean Article Number/Global Trade Item Number
GRead the instructions for use before using the product.
HThe product has not been approved by the manufacturer for use
as a seat in a wheelchair accessible vehicle
The nameplate is located on the crossbrace.
ICE marking – product safety in accordance with EU directives
H Depending on the version of the nameplate: The product has
not been approved by the manufacturer for use as a seat in
vehicles for transporting persons with reduced mobility
See the instructions for use (user) for additional warning labels.
4 Delivery
4.1 Scope of delivery
The wheelchair is delivered preassembled and with the rear wheels removed packed in a crate.
The scope of delivery includes:
• Preassembled wheelchair
• 2 rear wheels
• Options according to the order
• Instructions for use (qualified personnel), instructions for use (user)
The seat cushion is not included in the standard package.
4.2 Options
The functionality and operation of the options are described in more detail in the instructions for use (user).
All of the available options/accessories are listed on the order form.
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Delivery

4.3 Storage
The wheelchair must be stored in a dry place. The ambient temperature must be maintained between -10°C and
+40°C during transportation and storage.
During extended storage, the knee lever wheel lock on wheelchairs with PU tyres must be released since tyre
deformation may otherwise result.
Tyres contain chemical substances that can react with other chemical substances (such as cleaning agents, acids,
etc.).
5 Preparation for use
5.1 Assembly
CAUTION
Exposed pinch points
Crushing, pinching due to incorrect handling
►When folding out the backrest, only grip by the specified components.
CAUTION
Failure to verify readiness for use before putting into operation
Tipping, falling due to incorrect adjustment or installation
►Check the existing settings prior to first use.
►After every assembly, check for proper mounting of the rear wheels. The quick-release axles must be securely
locked in the receiver bushings.
►Pay particular attention to the stability against tipping, free running of the rear wheels and correct function of
the wheel locks.
►Check the tyre pressure. The correct tyre pressure is printed on the sidewall. Ensure that the pressure is the
same in both tyres.
1) Push the rear wheels into the wheel brackets. The quick-release axles must not be able to be removed after the
push-button has been released.
2) If necessary, position the backrest upright and allow the latch to engage.
3) Rotate the side panels into position and insert them into the side panel supports.
4) If necessary, insert the calf strap.
5) Place the cushion on the seat.
6 Settings
6.1 Prerequisites
WARNING
Incorrect settings
Tipping over, falling or malposition of the user due to incorrect settings
►Adjustment and installation work may only be completed by instructed, qualified personnel.
►Only the settings described in these instructions for use may be carried out.
►Settings may only be changed within the allowable adjustment ranges; otherwise, the stability of the product
may be impaired (see this chapter and the chapter "Appendices"). If you have questions, contact the manu
facturer's service (see back cover for addresses).
►Only conduct tests in the presence of an assistant.
►Unless expressly described, you may not change any settings with a person sitting in the product.
►Secure the user against falling out during all tests.
►Before testing setting changes with the user seated, firmly tighten all screw connections.
►Check for safe function before delivering the product.
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Preparation for use
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CAUTION
Unsecured screw connections
Pinching, crushing, tipping over, falling of user due to assembly errors
►After all adjusting/readjusting work, retighten the mounting screws/nuts firmly. Observe any torque settings
which may be specified.
►Any time you loosen a screw connection with thread lock, replace it with a new screw connection with thread
lock or secure the old screw connection with medium strength thread locker (e.g. Loctite® 241).
CAUTION
Improper use of self-locking nuts
Tipping, falling over of the user due to screw connections coming loose
►Always replace self-locking nuts with new self-locking nuts after disassembly.
Adjustments to match the concrete physical and mental condition of the user should always be made in the user's
presence.
All parts of the product should be cleaned thoroughly before adjustments are made.
The tools required for configuration and maintenance are summarised in the section "Appendices" (see Page32
ff.).
6.2 Adjusting the Rear Wheels
CAUTION
Lack of fine adjustment of the rear wheels
Tipping over, falling of the user due to incorrect adjustment
►Check the standard adjustments of the wheelchair for stability against tipping and function of the rear wheels.
Avoid any extreme settings.
CAUTION
Incorrectly adjusted wheelbase
Tipping over, falling of the user due to unstable settings
►Please note that with the rear wheel in the front position and with an unfavourable body position, the user may
tip backwards even on level ground.
►Use an anti-tipper for inexperienced users and with extreme settings of the rear wheel.
►Be sure to position the rear wheels towards the rear for transfemoral amputees. This improves the stability of
the wheelchair.
CAUTION
Incorrect mounting of the camber module
Tipping over, falling of the user due to lack of adhesion
►Do not pull the camber module out too far. During installation the whole camber module must be fully
enclosed by the clamping fixture.
INFORMATION
Changing the rear wheel position can also change the angle between the caster wheel journal and the ground.
However, this must be approx. 90°. The knee lever wheel lock also has to be readjusted.
6.2.1 Adjusting the horizontal position of the rear wheels
The horizontal rear wheel position is changed by moving the slider on the frame horizontally. This has the following
effects:
Position of rear wheel Effects
Move backwards (passive setting) • Larger wheelbase
• Larger turning circle
• Greater stability of the wheelchair
• Wheelchair is harder to tip backwards when crossing obstacles
• Position recommended for inexperienced users
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Settings

Position of rear wheel Effects
Move forwards (active setting) • Smaller wheelbase
• Less load on caster wheels = greater manoeuvrability
• Less stability of the wheelchair
• Wheelchair is easier to tip backwards when crossing obstacles
INFORMATION: An anti-tipper can be installed if necessary.
• Position recommended only for experienced users
6.2.1.1 Adjusting the sliders on the frame
The sliders can be moved continuously in a horizontal direction along the frame tube. To facilitate adjustment the
frame has a grid with 9 positions (see fig.68).
1) Remove the wheels.
2) Place the wheelchair upside down.
3) Loosen the 2 x 2 Allen head screws on the sliders under the seat bottom (see fig.1, item1).
4) Move the sliders with the axle unit to the desired position (see fig.1, item2):
→Use the grid as a rough guide (see fig.2, item1).
→For a more accurate guide, measure the distance between the end of the tube and the outer edge of the
slider (see fig.2, item2).
5) Ensure that the depth setting is the same. Once changed, the left and right sliders must both have exactly the
same horizontal position on the frame.
6) Tighten the Allen head screws to 10Nm (see fig.1, item1).
INFORMATION
Following adjustment, the track of the rear wheel, the caster journal angle and the knee lever wheel lock must be
checked and, if necessary, readjusted (refer to the corresponding section).
1 2
6.2.1.2 Adjusting sliders with shock absorber system
Adjustment is done in the same way as for sliders without a shock absorber system.
6.2.2 Adjusting the seat height and seat angle
Position of rear wheel Effects
Move upwards • The higher the rear wheel position, the more the seat surface is tilted to
the rear
• Wheelchair is easier to tip backwards when crossing obstacles
• The change in the centre of gravity results in a lower, more stable seat
position in the wheelchair
• The seat height can be further adjusted in combination with a height
adjustment of the caster wheels.
Move downwards • The lower the rear wheel position, the less the seat surface is tilted to the
rear
• Wheelchair is harder to tip backwards when crossing obstacles
• The seat height can be further adjusted in combination with a height
adjustment of the caster wheels.
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Settings
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6.2.2.1 Adjusting the height of the rear wheels
The rear wheels can be moved vertically with the "long" slider in 15 height positions (see fig.68) and with the
"medium" slider in 10 height positions (not pictured).
1) Remove the wheels.
2) Place the wheelchair upside down.
3) Loosen and remove the 2 Allen head screws on each clamping flange on the slider (see fig.3, item 1; figure
with accessory mount).
4) Move the axle unit to the desired position on the slider (see fig.4, item2). Ensure the height settings are the
same.
5) Tighten the Allen head screws to 10Nm (see fig.3, item1).
→Once changed, the clamping flanges on the left and right must both have the same vertical position on the
slider.
INFORMATION
Following adjustment, the track of the rear wheel, the caster journal angle and the knee lever wheel lock must be
checked and, if necessary, readjusted (refer to the corresponding section).
3 4
6.2.2.2 Adjusting the height of the rear wheels in the shock absorber system
The rear wheels can be moved vertically with the "short" shock absorber system in 3 height positions (see fig.72)
and with the "long" shock absorber system in 5 height positions (see fig.73) (see fig.5).
1) Remove the wheels.
2) Place the wheelchair upside down.
3) Loosen and remove the 2 x Allen head screws on each perforated plate from the clamping flange/spacer (see
fig.6, item 1). Remove the axle assembly (see fig.6, item 2).
4) Remove the spacers and place them in the required positions on the perforated plate (see fig.7). Ensure the
height settings are the same.
Only if necessary: Turn the spacers (see fig.8).
5) Hold the axle assembly with clamping flange to the perforated plates at the same height (see fig.6, item 2).
6) Tighten the Allen head screws on each perforated plate from the inside to 10Nm (see fig.6, item 1).
→Once changed, the clamping flanges on the left and right must both have the same vertical position on the
slider.
7) Put the wheels back on.
INFORMATION
Following adjustment, the track of the rear wheel, the caster journal angle and the knee lever wheel lock must be
checked and, if necessary, readjusted (refer to the corresponding section).
INFORMATION
By disassembling and turning the perforated plate in the "long" shock absorber, additional height adjustments
can be implemented. For information on disassembly/assembly, see the 647G829 service manual.
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Settings

5 6
7 8
6.2.3 Adjusting the Track Width (additional adjustment)
The 0° and 3° camber modules (see fig.13, item1) can slide in the clamping flange for adjusting the track width.
With the 6° and 9° camber modules (see fig.13, item2), the track is changed by adjusting the screwed in fitting
(see fig.12, item1).
Adjusting camber module 0°/3°
1) Remove the wheels.
2) Place the wheelchair upside down.
3) Loosen the clamping screw on the clamping flange (see fig.9, item1).
INFORMATION: The adjustment must be made on one side first and then on the other.
INFORMATION: The track width must be adjusted symmetrically on both sides.
4) Insert the rear wheel's quick-release axle into the camber module to aid removal (see fig.10, item1).
5) Move the camber module (see fig.10, item2) to the desired position outwards with the aid of the quick-release
axle or inwards with the help of a soft-faced hammer.
→Do not pull the camber module out too far. During installation the whole camber module must be fully
enclosed by the clamp bracket.
→Check the position by measuring it afterwards (see fig.11).
6) Clamp the camber module lightly using the clamping screw on the clamping flange.
7) Adjust the track width in the same fashion on the other clamping flange. Make sure that both camber modules
have been adjusted symmetrically.
8) Attach the wheels.
9) Make the track adjustments (see Page15).
10) Tighten the clamping screws to 10Nm (see fig.9, item1).
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Settings
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9 10
11 12
Adjusting camber module 6°/9°
1) Remove the wheels.
2) Place the wheelchair upside down.
3) Loosen the counter nut on the fitting (see fig.12, item2).
4) Set the desired track width with the fitting (see fig.12, item1). If required, put on the wheel to check that it can
rotate freely.
INFORMATION: The track width must be adjusted symmetrically on both sides.
5) Slightly tighten the counter nut on the fitting.
6) Adjust the track width in the same fashion on the other camber module.
7) Attach the wheels.
8) Make the track adjustments (see Page15).
9) Tighten the counter nut to 50Nm (see fig.12, item2).
6.2.4 Adjusting the Rear Wheel Camber
Position of rear wheel Effects
0° position • Narrow track, excellent straight-line stability
• Low rolling resistance
Wheel camber • Wheelchair becomes more manoeuvrable, turns faster and tips less easily
to the side
• The wheel position protects the hands when turning the push ring
• Overall width increases
• Increased rolling resistance
6.2.4.1 Adjusting the 0°/3°/6°/9° rear wheel camber
The modular system of the product offers camber options for different sloped settings of the rear wheels (0° and
3°: see fig.13, item 1; 6° and 9°: see fig.13, item2).
1) Remove the wheels.
2) Place the wheelchair upside down.
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Settings

3) Loosen the clamping screw on the clamping flange (see fig.9, item1, see fig.15, item1).
INFORMATION: Note that the exchange can be made on one side first and then on the other or simul
taneously.
INFORMATION: The track width must be adjusted symmetrically on both sides.
4) Remove the camber module:
→Only for camber module 0°/3°: Insert the quick-release axle of the rear wheel into the camber module to
assist removal (see fig.14, item1/2) and pull it out with the help of the quick-release axle.
→Only for camber module 6°/9°: Remove the camber module including fitting by hand (see fig.16, item1).
5) Replace and install the camber module.
→Set the track width so that the slanted rear wheels can run freely (see Page12).
→Only for camber module 0°/3°: The entire camber module must be fully enclosed by the clamp bracket
during installation. Check the position by measuring it afterwards (see fig.11).
→Only for camber module 6°/9°: During installation, the camber module must be inserted in the clamping
flange to the stop (see fig.16, item2).
6) Clamp the camber module lightly using the clamping screw on the clamping flange.
7) Replace the camber module on the other side in the same fashion. Make sure that both camber modules have
been adjusted symmetrically.
8) Attach the wheels.
9) Make the track adjustments (see Page15).
10) Tighten the clamping screws to 10Nm (see fig.9, item1; see fig.15, item1).
13 14
15 16
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Settings
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6.2.5 Adjusting the Track
INFORMATION
►The track must be adjusted after the following adjustments have been made:
→Adjusting the track width: see Page12
→Adjusting the rear wheel camber: see Page13
►The track setting must be checked and, if necessary, adjusted after the following adjustments have been
made:
→Adjusting the horizontal position of the rear wheel: see Page10
→Adjusting the height of the rear wheel: see Page11
INFORMATION
►Always make the track adjustment on both sides and check both sides.
►With each track adjustment, always check the symmetry of the track width setting. To do this, measure the
distance between the outer side of the camber module and the outer side of the clamping flange on both
sides (see fig.11).
►The caster journal angle should be checked immediately after every adjustment to the track (see Page17 ff.).
> The clamping screws on the clamping flanges must be loosened until the camber modules and the rear wheel
axle are only slightly clamped (see Page12).
1) Place the wheelchair on an even surface. Avoid twisting the axle when doing this.
2) Pull the rear wheel out slightly in order to make room for the installation.
3) Place the spirit level on the camber module (see fig.17).
4) Carefully twist the camber module until the spirit level is centred (not pictured).
If necessary ‒ after changing the wheel camber, for example ‒ twist the rear wheel axle carefully as well until
the spirit level is centred (see fig.18).
5) Tighten the clamping screws on the clamping flanges to 10Nm (see fig.9, item1).
17 18
6.2.6 Adjustments in the case of a wheelbase extension
The manufacturer offers a wheelbase extension for this product. This allows the use of the wheelchair with an
adaptable handbike (wheelchair with double axle: see fig.19) or a particularly passive setting for the wheelchair
(see fig.20, item1). Depending on the order, the wheelbase extension may already be installed when delivered.
All adjustments with the wheelbase extension installed are made in the same way as the adjustments without
wheelbase extension:
• Adjusting the horizontal position of the rear wheel: see Page10
• Adjusting the rear wheel height: see Page11
Special requirement: During adjustment of the rear wheel height, 4Allen head screws must be loosened and
moved on each slider (see fig.21, item1).
• Adjusting the track width: see Page12
Special requirement: During adjustment of the track width with camber module 0°/3°, the clamps for the
wheelbase extension must be loosened (see fig.21, item2). Adjusting the track width with camber module
6°/9° is done by adjusting the fitting (see fig.12).
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Settings

• Adjusting the rear wheel camber: see Page13
Special requirement: During exchange of the camber modules, the clamps for the wheelbase extension must
be loosened (see fig.21, item2).
INFORMATION: For a wheelbase extension with a double axle, only certain camber modules can be
combined:
–Front axle camber modules/rear axle camber modules: 0°/3° or 6°/9°.
–If 9° camber modules are installed on the front axle, no camber modules can be used on the rear
axle.
• Adjusting the knee lever wheel lock: see Page19
Special requirement: For extreme settings, the wheelbase extension must be used in combination with an
"upgrade" knee lever wheel lock (see fig.20, item2).
If necessary, the wheel lock holder must be moved behind the locking mechanism for the side panel supports.
CAUTION: Risk of falling, tipping over. If the wheelbase extension is used in combination with a
double axle, there is no braking function available when the rear wheels are moved to the rear axle
(e.g. for adaptation to a handbike). Inform the user.
19 20
21 22
Wheelbase extension and clothing protector
If a wheelbase extension is installed, the side panels can be folded when the user is getting into the wheelchair as
follows:
• The "standard" side panel can be folded towards the rear (see fig.22).
• The "clothing protector" side panel can be swung back (see fig.23) and folded down (see fig.24).
Retrofitting
Use the 647G829 service manual if the retrofitting of a wheelbase extension becomes necessary in the course of an
initial fitting.
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6.3 Adjusting the caster wheels
6.3.1 Adjusting the Caster Wheel Journal Angle
When the rear wheels have been adjusted for the user, the caster journal angle must be adjusted at the caster
wheel adapter.
The threaded axle in both caster wheel adapters should be perpendicular to the ground to ensure optimum rolling
behaviour of the wheelchair. The caster wheel adapters permit continuous adjustment of this angle.
Adjusting the caster journal angle ‒ "standard" caster fork
1) Lift off the plastic cover on the inner side of the frame (see fig.25).
2) Slightly loosen the Allen head screws on the inner side of the frame (see fig.26, item1/2). If necessary, loosen
and move the front screw (see fig.26, item1).
3) Remove the protective cap (see fig.27, item1).
4) Slightly loosen the Allen head screw on the eccentric (see fig.27, item2).
5) Position the spirit level (see fig.27, item3).
6) Adjust the caster wheel axle with a large flat screwdriver until it is vertical. The bubble in the spirit level must be
in the centre position (see fig.28).
7) Tighten the Allen head screw on the eccentric to 10Nm (see fig.27, item2).
8) Tighten the Allen head screws on the inner side of the frame to 23Nm (see fig.26, item1/2).
9) Place the protective cap (see fig.27, item1) and the plastic cover on the inner side of the frame (see fig.25).
→The caster wheel axle on each of the two caster wheel adapters must be positioned vertically.
25 26
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Adjusting the caster journal angle ‒ "design"/"froglegs" castor fork
INFORMATION
Proceed in the same way as in the previous section.
The adjustments for the "design" caster fork (see fig.70) and the "froglegs" caster fork (see fig.71) are made in
the same fashion.
1) Lift off the plastic cover on the inner side of the frame (not pictured).
2) Slightly loosen the Allen head screws on the inner side of the frame (not pictured).
3) Remove the cover of the eccentric (not pictured) and the cap above the caster axle (see fig.29, item1).
4) Slightly loosen the Allen head screw on the eccentric (see fig.29, item2).
5) Slightly loosen the Allen head screws on the inner side of the frame (not pictured).
6) Position the spirit level (see fig.30, item 1).
7) Adjust the caster wheel axle with a large flat screwdriver until it is vertical. The bubble in the spirit level must be
in the centre position (see fig.30, item 2).
8) Tighten the Allen head screw on the eccentric to 8Nm (see fig.29, item2).
9) Tighten the Allen head screws on the inner side of the frame to 23Nm (not pictured).
10) Replace all covers (not pictured).
→The caster wheel axle on each of the two caster wheel adapters must be positioned vertically.
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6.3.2 Changing the Installation Position of the Caster Wheels
INFORMATION
Observe the seat height table in the "Technical data".
The anterior seat height is adjusted via the row of holes in the fork and via the caster wheel diameter.
1) Loosen the screw connection on the threaded axle (see fig.31, item1).
2) Remove the threaded axle/spacers.
3) Remove the caster wheel.
4) Insert the threaded axle with the first spacer bushing offset in one of the 4 bore holes (see fig.31, item2).
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5) Install the caster wheel.
6) Slide on the 2nd spacer bush (not pictured).
7) Tighten the threaded axle to 8Nm.
→Once changed, the left and right caster wheels must have the same vertical position in the caster fork.
→Once the anterior seat height has been adjusted, the rear wheel tracking (see Page15) and the caster journal
angle (see Page17) must be checked and adjusted if required.
31
6.4 Adjusting the brakes
CAUTION
Failure to verify brake functionality
Accident, falling of the user due to incorrect adjustment and improperly inflated tyres
►Verify the correct setting of the wheel lock (especially the distance between the wheel lock bolt and tyre).
►Ensure that the user can operate the wheel lock without great effort. The force required is not permitted to
exceed 60 N (~ 6 kg).
►Check the tyre pressure of the rear wheels. Note the information in the section "Technical data" or on the tyre
sidewall.
►Only use original rear wheels with a verified maximum radial out-of-round of 1mm.
6.4.1 Adjusting the wheel locks
INFORMATION
If the horizontal rear wheel position is changed (see Page10) or a different rear wheel size is installed, the
481H25=PK025 knee lever wheel lock must be installed with a seat depth of <340mm (depending on the hori
zontal rear wheel position and rear seat height). For more information, see the 647G829 service manual.
This adjustment must be made after the rear wheel has been repositioned or during fine adjustment.
The following brake types are adjusted in the same way: "standard" knee lever wheel lock, "upgrade" knee lever
wheel lock, scissor wheel lock.
1) Loosen the Allen head screws in the clamp bracket on the underside of the frame (see fig.32, item1).
2) Adjust/move the support for the knee lever wheel lock (see fig.32, item2) to any position in the clamp bracket
(see fig.32, item3).
When the wheel lock is disengaged, the gap between the tyre and wheel lock bolt must not exceed 5mm (see
fig.33).
INFORMATION: For special requirements when adjusting the scissor wheel lock, see the section
"Special requirements for adjustments to the scissor wheel lock".
3) Tighten the Allen head screws to 10Nm.
→After adjustment, the left and right knee lever wheel locks must both have the same braking force.
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mm
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Special requirements for adjustments (all types of wheel locks)
Depending on the adjustment, it may be necessary to rotate or replace the support for the wheel lock. This makes
further wheel lock adjustments possible.
1) Loosen the Allen head screws between the wheel lock and the support (example: scissor wheel lock: see
fig.34, item 1; see fig.35, item1).
2) Rotate and reposition the support as necessary (example: scissor wheel lock: see fig.34, item 2; see fig.35,
item2).
3) Retighten the Allen head screws between the wheel lock (with spacer in some cases) and the support.
34 35
Special requirements for adjustments to the scissor wheel locks
• Install the scissor wheel lock such that it can be guaranteed that the swivelling parts can move freely without
colliding (see fig.36 item 1; see fig.37, item1).
• The scissor wheel lock should not hit the frame when it is open.
• For information on using the scissor wheel lock, see the instructions for use (user), reference number
647G828.
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