Otto Bock Ventus User manual

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

2 Ventus

Foreword1 5..............................................................................................................................................................
Intended use2 5........................................................................................................................................................
Indications for use2.1 5................................................................................................................................
Indications, contraindications2.2 5.................................................................................................................
Qualification2.3 5.........................................................................................................................................
Safety3 5....................................................................................................................................................................
Explanation of warning symbols3.1 5..............................................................................................................
General safety instructions3.2 6.....................................................................................................................
Safety Instructions for Assembly3.3 6.............................................................................................................
Further information3.4 6................................................................................................................................
Nameplate3.5 6...........................................................................................................................................
Delivery4 7.................................................................................................................................................................
Scope of delivery4.1 7..................................................................................................................................
Options4.2 7...............................................................................................................................................
Storage4.3 7...............................................................................................................................................
Preparing the product for use5 7...........................................................................................................................
Assembly5.1 7.............................................................................................................................................
Settings6 8................................................................................................................................................................
Prerequisites6.1 8........................................................................................................................................
Adjusting the drive wheels6.2 8.....................................................................................................................
Adjusting the depth of the drive wheels6.2.1 9....................................................................................................
Adjusting the sliders on the frame6.2.1.1 9...........................................................................................................
Adjusting sliders with shock absorber system6.2.1.2 9...........................................................................................
Adjusting the seat height and seat inclination6.2.2 10..........................................................................................
Adjusting the height of the drive wheels6.2.2.1 10.................................................................................................
Adjusting the height of the drive wheels in the shock absorber system6.2.2.2 10.......................................................
Adjusting the drive wheel camber6.2.3 11..........................................................................................................
Adjusting the 0°/3°/6°/9° drive wheel camber6.2.3.1 11.........................................................................................
Adjusting the track width (additional adjustment)6.2.4 12.....................................................................................
Adjusting the track6.2.5 14..............................................................................................................................
Adjusting the quick-release axle6.2.6 14............................................................................................................
Adjustments in the case of a wheelbase extension6.2.7 15...................................................................................
Adjusting the caster wheels6.3 16..................................................................................................................
Adjusting the caster journal angle6.3.1 16..........................................................................................................
Changing the installation position of the caster wheels6.3.2 18............................................................................
Adjusting the wheel locks6.4 19.....................................................................................................................
Adjusting the knee lever wheel locks6.4.1 19.....................................................................................................
Adjusting the scissor wheel locks6.4.2 19..........................................................................................................
Special requirements for adjustments6.4.3 20....................................................................................................
Adjusting the back support6.5 20...................................................................................................................
Adjusting the back support height6.5.1 20.........................................................................................................
Adjusting the back support angle6.5.2 20..........................................................................................................
Adjusting the push handles6.5.3 21..................................................................................................................
Adjusting the back support upholstery / seat upholstery6.6 21...........................................................................
Adjusting the back support upholstery6.6.1 21...................................................................................................
Adjusting the seat upholstery6.6.2 22................................................................................................................
Adjusting the leg supports6.7 23....................................................................................................................
Adjusting the lower leg length6.7.1 23...............................................................................................................
Adjusting the support angle6.7.2 24..................................................................................................................
Installing and adjusting the lateral heel blocks6.7.3 24........................................................................................
Adjusting the side panels6.8 24.....................................................................................................................
Adjusting the “height-adjustable” arm support6.8.1 24........................................................................................
Adjusting the “padded” arm support6.8.2 25......................................................................................................
Adjusting the “standard” and “clothing guard” side panels6.8.3 25.......................................................................
Installing and adjusting the swivel unit and forearm supports6.8.4 26....................................................................
Table of contents
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Table of contents

Adjusting the anti-tipper and tip-assist6.9 26...................................................................................................
Adjusting the anti-tipper6.9.1 26.......................................................................................................................
Installing and adjusting the tip-assist6.9.2 27.....................................................................................................
Adjusting the lap belt6.10 28...........................................................................................................................
Installing and adjusting the head support6.11 28...............................................................................................
Delivery7 29...............................................................................................................................................................
Final inspection7.1 29..................................................................................................................................
Transport to the customer7.2 29....................................................................................................................
Handing over the product7.3 29.....................................................................................................................
Maintenance and repair8 30...................................................................................................................................
Disposal9 30.............................................................................................................................................................
Disposal information9.1 30............................................................................................................................
Information on re-use9.2 30...........................................................................................................................
Legal information10 30..............................................................................................................................................
Liability10.1 30..............................................................................................................................................
Warranty10.2 30............................................................................................................................................
Service life10.3 30.........................................................................................................................................
Technical data11 30...................................................................................................................................................
Appendices12 36........................................................................................................................................................
Required tools12.1 36....................................................................................................................................
Torque values of the screw connections12.2 36.................................................................................................
4 Ventus
Table of contents

1 Foreword
INFORMATION
Date of last update: 2020-03-19
►Please read this document carefully before using the product and observe the safety notices.
►Instruct the user in the safe use of the product.
►Please contact the manufacturer if you have questions about the product or in case of problems.
►Report each serious incident in connection with the product, in particular a worsening of the state of health, to
the manufacturer and to the relevant authority in your country.
►Please keep this document for your records.
INFORMATION
►New information regarding product safety and product recalls as well as the declaration of conformity can be
obtained at [email protected] or from the manufacturer’s service department (see inside or outside of rear
cover for addresses).
►You can request this document as a PDF file at [email protected] or from the manufacturer’s service depart
ment (see inside or outside of rear cover for addresses). The PDF file can also be displayed in a larger size.
Initial adjustments to the product were made according to the order form. Nevertheless, fine adjustments and set
tings may have to be made depending on the medical situation 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 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 manufacturer reserves the right to make technical changes to the model described in these instructions for
use.
2 Intended use
The operational safety of the product can only be ensured in case of intended use in accordance with the informa
tion contained in these instructions for use (qualified personnel) and in the instructions for use (user). The user is
ultimately responsible for accident-free operation.
2.1 Indications for use
For additional information about the indications for use, see the instructions for use (user).
2.2 Indications, contraindications
See the instructions for use (user) for more information about indications and contraindications.
2.3 Qualification
The tasks described below may only be carried out by qualified personnel. Compliance with all manufacturer spe
cifications and all applicable legal provisions is required. Please contact the manufacturer’s service department for
further information (see inside or outside of rear cover for addresses).
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.
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Foreword

3.2 General safety instructions
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.
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 drive 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 drive wheels", "Adjusting the caster wheels").
WARNING
Improper assembly of removable wheels
Tipping, falling over of the user due to wheels coming off
►After each assembly, verify the proper fit of the removable wheels. The quick-release axles must be firmly
locked in the wheel attachment.
3.4 Further information
INFORMATION
The serial number required for enquiries and orders can be found on the nameplate. For explanations of the
nameplate, see the section "Nameplate" (see Page6).
3.5 Nameplate
The nameplates are found on the frame.
Label Meaning
AManufacturer’s product name
BCE marking
CMaximum load (see section “Technical data”)
DManufacturer information/address
ESerial number1)
FManufacturing date2)
GSymbol for medical device
HWARNING! Read the instructions for use before using the
product. Observe important safety-related information
(e.g.warnings, precautions).
IThe product has not been approved by the manufacturer for use
as a seat in vehicles for transporting persons with reduced
mobility
JManufacturer’s reference number for the product variant
KSerial number (PI)3),1)
LGlobal Trade Item Number (DI)4)
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Safety
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1)YYYY = year of manufacture; WW = week of manufacture; PP = production site; XXXX = sequential production
number
2)YYYY = year of manufacture; MM = month of manufacture; DD = day of manufacture
3)UDI-PI to GS1 standard; UDI = Unique Device Identifier, PI = Product Identifier
4)UDI-DI to GS1 standard; UDI = Unique Device Identifier, DI = Device Identifier
See the instructions for use (user) for additional warning labels.
4 Delivery
4.1 Scope of delivery
• Preassembled wheelchair
• Two drive wheels (installed or included)
• Options according to the order
• Instructions for use (qualified personnel), instructions for use (user)
• Instructions for use for accessories (depending on equipment)
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.
4.3 Storage
Store the wheelchair in a dry, enclosed room, protected from external influences. Specific information about stor
age conditions: see Page30.
During extended storage, the knee lever wheel lock on wheelchairs with PU tyres must be released since tyre
deformation may otherwise result.
Maintain sufficient clearance from sources of heat. If the product is parked for an extended period of time or the
tyres overheat (e.g.in the vicinity of radiators or in case of exposure to strong sunlight behind glass), the tyres may
become permanently deformed.
5 Preparing the product 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 drive 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 drive 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 drive 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.
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Delivery

6 Settings
6.1 Prerequisites
WARNING
Making incorrect adjustments
Tipping over, falling or malposition of the user due to incorrect adjustments
►Adjustment and assembly work may be carried out only by qualified personnel.
►Only the adjustments 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 section and the “Technical data” section). If you have questions, contact the
manufacturer’s service department (see inside 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.
CAUTION
Unsecured screw connections
Pinching, crushing, tipping over, falling of user due to assembly errors
►Always firmly re-tighten the mounting screws and nuts after changing settings. Observe the specified torques
in doing so.
►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).
►Always replace self-locking screws and nuts with new self-locking screws and nuts after disassembly.
Fine-tuning and adjustments should always be carried out in the presence of the user. The user should be sitting
upright in the wheelchair while making adjustments.
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36
ff.).
6.2 Adjusting the drive wheels
WARNING
Lack of fine adjustment of the drive 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 drive
wheels. Avoid any extreme settings.
WARNING
Incorrectly adjusted wheelbase
Tipping over, falling of the user due to unstable settings
►Please note that with the drive wheel in a more forward mounting position and with an unfavourable body pos
ition, the user may tip backwards even on level ground.
►Use an anti-tipper for inexperienced users and with extreme settings of the drive wheel.
►Be sure to position the drive 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.
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INFORMATION
Changing the drive wheel position can also change the angle between the caster wheel journal and the ground.
However, this must always be approx. 90° and thus readjusted accordingly. The knee lever wheel lock also has
to be readjusted.
6.2.1 Adjusting the depth of the drive wheels
The horizontal drive wheel position is changed by moving the slider on the frame horizontally. This has the following
effects:
Position of drive 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
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 should be installed if necessary.
• Setting 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.65).
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.
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6.2.2 Adjusting the seat height and seat inclination
Drive wheel position Effects
Move upwards • The higher the drive 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 drive 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.
6.2.2.1 Adjusting the height of the drive wheels
The drive wheels can be moved vertically with the "long" slider in 15 height positions (see fig.65) 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 drive 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 drive wheels in the shock absorber system
The drive wheels can be moved vertically with the "short" shock absorber system in 3 height positions (see fig.69)
and with the "long" shock absorber system in 5 height positions (see fig.70) (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).
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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 drive 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.
5 6
7 8
6.2.3 Adjusting the drive wheel camber
Position of drive 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 handrim
• Overall width increases
• Increased rolling resistance
6.2.3.1 Adjusting the 0°/3°/6°/9° drive wheel camber
The modular system of the product offers camber options for different sloped settings of the drive wheels (0° and
3°: see fig.9, item 1; 6° and 9°: see fig.9, 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.13, item1, see fig.11, 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 drive wheel into the camber module to
assist removal (see fig.10, 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.12, item1).
5) Replace and install the camber module.
→Set the track width so that the slanted drive 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.15).
→Only for camber module 6°/9°: During installation, the camber module must be inserted in the clamping
flange to the stop (see fig.12, 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14).
10) Tighten the clamping screws to 10Nm (see fig.13, item1; see fig.11, item1).
9 10
11 12
6.2.4 Adjusting the track width (additional adjustment)
The 0° and 3° camber modules (see fig.9, item1) can slide in the clamping flange for adjusting the track width.
With the 6° and 9° camber modules (see fig.9, item2), the track is changed by adjusting the screwed in fitting
(see fig.16, item1).
Adjusting camber module 0°/3°
1) Remove the wheels.
2) Place the wheelchair upside down.
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3) Loosen the clamping screw on the clamping flange (see fig.13, 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.14, item1).
5) Move the camber module (see fig.14, 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.15).
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14).
10) Tighten the clamping screws to 10Nm (see fig.13, item1).
13 14
15 16
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.16, item2).
4) Set the desired track width with the fitting (see fig.16, 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14).
9) Tighten the counter nut to 50Nm (see fig.16, item2).
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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 drive wheel camber: see Page11
►The track setting must be checked and, if necessary, adjusted after the following adjustments have been
made:
→Adjusting the horizontal position of the drive wheel: see Page9
→Adjusting the height of the drive wheel: see Page10
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.15).
►The caster journal angle should be checked immediately after every adjustment to the track (see Page16 ff.).
> The clamping screws on the clamping flanges must be loosened until the camber modules and the drive 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 drive 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 drive 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.13, item1).
17 18
6.2.6 Adjusting the quick-release axle
The quick-release axle should be set so the wheel is correctly engaged, with no play on the axle.
1) Hold the quick-release axle by the head (wrench size: 19mm) and by the tip (wrench size: 11mm) with a ring
and open-ended wrench respectively.
2) Adjust the play by turning the nut on the end of the quick-release axle (see fig.19, item1) in or out.
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19
6.2.7 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.20) or a particularly passive setting for the wheelchair
(see fig.21, 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 drive wheel: see Page9
• Adjusting the drive wheel height: see Page10
Special requirement: During adjustment of the drive wheel height, 4Allen head screws must be loosened and
moved on each slider (see fig.22, 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.22, item2). Adjusting the track width with camber module
6°/9° is done by adjusting the fitting (see fig.16).
• Adjusting the drive wheel camber: see Page11
Special requirement: During exchange of the camber modules, the clamps for the wheelbase extension must
be loosened (see fig.22, item2).
INFORMATION: For a wheelbase extension with a double axle, only certain camber modules can be
combined:
–Front axle camber modules/drive axle camber modules: 0°/3°, 3°/6° or 6°/9°.
• 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.21, 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 drive wheels are moved to the drive axle
(e.g. for adaptation to a handbike). Inform the user.
20 21
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22 23
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 drive (see fig.23).
• The "clothing protector" side panel can be swung back (see fig.24) and folded down (see fig.25).
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 journal angle
WARNING
Damage to the eccentric during adjustment work
Loss of the caster fork
►When changing the position of the caster head on the frame, check the M8 interior thread on the eccentric for
damage and replace the eccentric if necessary.
When the drive 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 wheel
chair driving characteristics. 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 (not illustrated).
2) Slightly loosen the hexagon 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).
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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 hexagon head screws on the inner side of the frame to 23Nm (see fig.26, item1/2).
9) Put on the protective cap (see fig.27, item1).
10) Put on the plastic cover on the inner side of the frame (not illustrated).
→The caster wheel axle on each of the two caster wheel adapters must be positioned vertically.
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28
Adjusting the caster journal angle ‒ "design"/"froglegs" caster fork
INFORMATION
Proceed in the same way as in the previous section.
The adjustments for the "design" caster fork (see fig.67) and the "froglegs" caster fork (see fig.68) are made in
the same fashion.
1) Lift off the plastic cover on the inner side of the frame (not illustrated).
2) Slightly loosen the hexagon head screws on the inner side of the frame (not illustrated).
3) Remove the cover of the eccentric (not illustrated) 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 hexagon head screws on the inner side of the frame (not illustrated).
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 hexagon head screws on the inner side of the frame to 23Nm (not illustrated).
10) Replace all covers (not illustrated).
→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).
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14) and the caster journal
angle (see Page16) must be checked and adjusted if required.
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6.4 Adjusting the wheel locks
WARNING
Failure to verify brake functionality
Accident, user falls due to incorrect adjustment and improperly inflated tyres
►Check the correct spacing between the wheel lock bolt and tyre (see the following section for details).
►Check the correct position of the wheel lock bolt relative to the tyre. During braking, the wheel lock bolt has to
cover at least half the tyre width.
►Always carry out adjustments to the wheel lock on both sides.
►Ensure that the user can operate the wheel lock without great effort. The force required to do so must not
exceed 60N.
►Check the tyre pressure of the drive wheels. Note the information in the section “Technical data” or on the tyre
sidewall.
►Only use original drive wheels with a verified maximum radial out-of-round of 1mm.
This adjustment must be made after the drive wheel has been repositioned or during fine adjustment.
6.4.1 Adjusting the knee lever wheel locks
INFORMATION
If the horizontal drive wheel position is changed (see Page9) or a different drive wheel size is installed, the
481H25=PK025 knee lever wheel lock must be installed with a seat depth <340mm (depending on the horizontal
drive wheel position and rear seat height). For more information, see the 647G829 service manual.
The following brake types are adjusted in the same way: “standard” knee lever wheel lock, “upgrade” knee lever
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).
→The distance between the wheel lock bolt and the drive wheel must be1–5mmin the unbraked condition.
→It must be possible to operate the brake evenly and easily on both sides.
→The wheel lock bolt must lock the drive wheel securely when stationary.
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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6.4.2 Adjusting the scissor wheel locks
1) Loosen the Allen head screws in the clamp brackets (see fig.34, item1).
2) Adjust/move the support for the scissor wheel lock to any position in the clamp bracket (see fig.34, item2).
3) Install the scissor wheel lock so that the full braking force is reached and the swivelling parts can also move
freely without colliding.
→The scissor wheel lock must not hit the frame when it is open (see fig.34).
→It must be possible to operate the wheel lock evenly and easily on both sides.
→The wheel lock bolt must lock the drive wheel securely when stationary (see fig.35).
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4) Tighten both Allen head screws evenly to 12Nm in two passes (see fig.34, item1).
→After adjustment, the left and right scissor wheel locks must both have the same braking force.
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6.4.3 Special requirements for adjustments
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.
6.5 Adjusting the back support
6.5.1 Adjusting the back support height
The backrest height does not need to be adjusted during the initial fitting.
Back tubes must be retrofitted if the backrest height is to be adjusted. To install these, see the 647G829 service
manual.
6.5.2 Adjusting the back support angle
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.
The backrest angle can be adapted to the user's requirements ‒ e.g. after the wheelbase has been adjusted. The
angle can be adjusted between 65°‒105°.
Preliminary adjustment (20° steps)
1) Using the cable, pull out the locking bolts from the locking points (see fig.36, item1).
2) Rotate the counter nuts against the head of the set screw (see fig.36, item3).
3) Screw in the set screws by hand (see fig.36, item4).
4) Pull the backrest rearwards until the locking bolts lock into the desired locking points.
5) Unscrew each set screw until the screw head hits against the hook-and-loop patch (see fig.36, item5).
6) Retighten the counter nuts (see fig.36, item3). Use an open-end wrench to hold the head of the set screws
still (see fig.36, item4).
Fine adjustment (10° steps)
1) Remove the upper mounting screw on both sides (see fig.37, item1).
2) Slightly loosen the lower mounting screw on both sides (see fig.37, item2).
3) Rotate the counter nuts against the heads of the set screws (see fig.36, item3).
4) Screw in the set screws by hand (see fig.36, item4).
5) Adjust the back plate on both sides. Two settings are available (see fig.37, item3).
6) Reattach the mounting screws and tighten them (see fig.37, item1/2).
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