Otto Bock Avantgarde 4 User manual

Avantgarde 4
Instructions for use (qualified personnel) ................................................................. 3

2 Avantgarde 4

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.....................................................................................................................
Setting the drive wheels horizontally6.2.1 9........................................................................................................
Adjusting the drive wheel adapter position in the frame6.2.1.1 9..............................................................................
Adjusting the shock absorber in the frame6.2.1.2 10..............................................................................................
Adjusting the seat height and seat inclination6.2.2 10..........................................................................................
Adjustment in the drive wheel adapter6.2.2.1 11....................................................................................................
Adjustment in the shock absorber6.2.2.2 12.........................................................................................................
Adjusting the drive wheel camber6.2.3 12..........................................................................................................
Adjusting the track width (additional adjustment)6.2.4 14.....................................................................................
Adjusting the quick-release axle6.2.5 14............................................................................................................
Adjusting the handrims6.2.6 14........................................................................................................................
Adjusting the caster wheels6.3 14..................................................................................................................
Adjusting the caster journal angle6.3.1 14..........................................................................................................
Changing the installation position of the caster wheels6.3.2 16............................................................................
Adjusting the wheel locks6.4 17.....................................................................................................................
Adjusting the knee lever wheel locks6.4.1 17.....................................................................................................
Adjusting the scissor wheel locks6.4.2 18..........................................................................................................
Adjusting the knee lever wheel lock for user and attendant6.4.3 18.......................................................................
Adjusting the knee lever wheel lock for one-handed operation6.4.4 19..................................................................
Adjusting the braking force of the drum brake6.4.5 19.........................................................................................
Adjusting the back support6.5 20...................................................................................................................
Adjusting the back support height6.5.1 20.........................................................................................................
Adjusting the back support angle6.5.2 21..........................................................................................................
Adjusting the back support upholstery / seat upholstery6.6 22...........................................................................
Adjusting the back support upholstery6.6.1 22...................................................................................................
Adapting the adjustable back support upholstery6.6.1.1 22....................................................................................
Adjusting the “ultralight” back support upholstery6.6.1.2 23...................................................................................
Adjusting the seat upholstery6.6.2 23................................................................................................................
Adjusting the leg supports6.7 24....................................................................................................................
Adjusting the lower leg length6.7.1 24...............................................................................................................
Adjusting the support angle6.7.2 25..................................................................................................................
Adjusting the posterior lower leg pad on the elevating leg support6.7.3 26............................................................
Adjusting the side panels6.8 27.....................................................................................................................
Adjusting the “standard” and “clothing guard” side panels6.8.1 27.......................................................................
Adjusting the forearm support height6.8.2 28.....................................................................................................
Installing and adjusting the swivel unit and forearm supports6.8.3 28....................................................................
Table of contents
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Table of contents

Adjusting the anti-tipper6.9 29.......................................................................................................................
Adjusting the lap belt6.10 30...........................................................................................................................
Adjusting the tray6.11 30................................................................................................................................
Delivery7 30...............................................................................................................................................................
Final inspection7.1 30..................................................................................................................................
Transport to the customer7.2 30....................................................................................................................
Handing over the product7.3 30.....................................................................................................................
Maintenance and repair8 31...................................................................................................................................
Disposal9 31.............................................................................................................................................................
Disposal information9.1 31............................................................................................................................
Information on re-use9.2 31...........................................................................................................................
Legal information10 31..............................................................................................................................................
Liability10.1 31..............................................................................................................................................
Warranty10.2 31............................................................................................................................................
Service life10.3 31.........................................................................................................................................
Technical data11 32...................................................................................................................................................
Appendices12 35........................................................................................................................................................
Required tools12.1 35....................................................................................................................................
Torque values of the screw connections12.2 35.................................................................................................
4 Avantgarde 4
Table of contents

1 Foreword
INFORMATION
Date of last update: 2020-03-16
►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
2.1 Indications for use
For additional information about the indications for use, see the instructions for use (user).
The operational safety of the wheelchair can only be ensured in case of intended use in accordance with the
information contained in these instructions for use (qualified personnel) and in the instructions for use (user). The
user is ultimately responsible for accident-free operation.
2.2 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 crossbrace.
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).
IManufacturer’s reference number for the product variant
JSerial number (PI)3),1)
KGlobal Trade Item Number (DI)4)
1)YYYY = year of manufacture; WW = week of manufacture; PP = production site; XXXX = sequential production
number
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Safety
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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32.
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 the wheelchair out or together, 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.
It only takes a few simple steps to prepare the wheelchair for use:
1) Attach the drive wheels to the quick-release axle mounting. The quick-release axles must not be removable after
releasing the push-button.
2) Loosen the safety strap.
3) Unfold the wheelchair.
4) Only when equipped with a drive wheel with one-handed operation: Insert the telescoping rod (see
instructions for use (user)).
5) If necessary: Attach the leg supports. Fold the foot plate(s) down. When using a single-panel foot plate, be
sure the support of the foot plate is locked into the receiver.
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Delivery

6) If necessary: Secure the seat cushion against sliding by pressing it onto the hook-and-loop fastener.
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35
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.
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.
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6.2.1 Setting the drive wheels horizontally
INFORMATION
The adjustments described below may not be carried out on the CLT or CLT Ultra model.
The horizontal drive wheel position is changed by moving the drive wheel adapter or the shock absorber horizont
ally in the frame. 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 drive wheel adapter position in the frame
The drive wheel adapter can be adjusted horizontally to four positions (see fig.78 in the section “Technical data”).
Additional positions for very active wheelchair settings are obtained by rotating the drive wheel adapter by 180°
(see fig.80 in the section “Technical data”).
Adjusting the horizontal position of the drive wheel adapter
1) Loosen and remove the Allen head screws (see fig.1, item1).
2) Move the drive wheel adapter to the desired position (see fig.1, item2).
3) Insert the Schnorr washers and tighten the Allen head screws to 8 Nm (see fig.1, item1).
→After the adjustment, the left and right drive wheel adapters must have the same horizontal position on the
frame.
1
Rotating and adjusting the horizontal position of the drive wheel adapter
From position E, the drive wheel adapter must be rotated (see fig.80 in the section “Technical data”) in order to be
able to adjust the position of the drive wheel adapter even further forwards (for very active settings).
1) Loosen and remove the Allen head screws (see fig.1, item1).
2) Turn the drive wheel adapters 180° about their own axis and swap them over:
→Drive wheel adapter L (see fig.2, item1) goes on the right side.
→Drive wheel adapter R (see fig.2, item2) goes on the left side.
3) Move the drive wheel adapter to the desired position (see fig.3).
4) Insert the Schnorr washers and tighten the Allen head screws to 8Nm (see fig.4).
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2 3
4
6.2.1.2 Adjusting the shock absorber in the frame
The shock absorber can be continuously adjusted in the horizontal direction in the frame.
1) Loosen the clamping bolts on the half shells of the shock absorber top and bottom (see fig.5, item 1).
2) Move the shock absorber. Use the bores in the frame for orientation (see fig.6, item 1).
3) Tighten the clamping bolts to 8 Nm (see fig.6, item 2).
→Once changed, the left and right shock absorber must have the same horizontal position on the frame.
5 6
6.2.2 Adjusting the seat height and seat inclination
INFORMATION
The adjustments described below may not be carried out on the CLT or CLT Ultra model.
The seat height and the seat inclination are adjusted by moving the quick-release axle mounting (fitting)1) vertically
in the drive wheel adapter. This has the following effects:
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Position of drive wheel 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.
1) The term “fitting” is the term used in the German and English spare parts catalogue. Alternatively, the instructions for use
explain the function of the component, which is why the term quick-release axle mounting is used there.
6.2.2.1 Adjustment in the drive wheel adapter
The drive wheel can be installed at six height positions in the drive wheel adapter (see fig.78/see fig.80). Six addi
tional height positions are obtained by swapping the drive wheel adapters on the right and left sides and rotating
them at the same time (see fig.79/see fig.81).
Adjusting the height within the drive wheel adapter
1) Loosen the hexagon nuts on both sides of the quick-release axle mounting (see fig.7, see fig.8).
2) Pull the quick-release axle mounting washers (see fig.9, items2/3) out until the quick-release axle mounting is
moveable.
3) Slide the quick-release axle mounting with the hexagon nuts, quick-release axle mounting washers and sleeve
to the desired position.
4) Note the following during assembly of the quick-release axle mounting:
→Camber setting: This is adjusted via the angle of the bore in the quick-release axle mounting (see fig.10,
item1, description: see Page12).
→Quick-release axle mounting washers: The respective chamfered edge of the quick-release axle mounting
washers faces out (see fig.10, item2).
→Alignment: Once changed, the left and right quick-release axle mountings must both have the same vertical
and horizontal position in the drive wheel adapter.
5) Tighten the hexagon nuts on both sides of the quick-release axle mounting to 40Nm.
7 8
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9
2
10
Six additional height positions by swapping the drive wheel adapters and rotating from top to bottom
1) Note the horizontal installation position of the drive wheel adapter. Loosen and remove the Allen head screws
(see fig.1, item1).
2) Turn the drive wheel adapters 180° from top to bottom and swap them over:
→Drive wheel adapter L (see fig.2, item1) goes on the right side.
→Drive wheel adapter R (see fig.2, item2) goes on the left side.
3) Apply the drive wheel adapter in the horizontal installation position from step 1 (see fig.3).
4) Insert the Schnorr washers and tighten the Allen head screws to 8Nm (see fig.4).
5) Adjust the height of the quick-release axle mounting (see above, “Height adjustment within the drive wheel
adapter”).
6.2.2.2 Adjustment in the shock absorber
The drive wheel can be installed at 3 height positions on the shock absorber.
1) Loosen and remove the nut on one side of the quick-release axle mounting (see fig.11, item 1).
2) Remove and adjust the quick-release axle mounting.
3) Reinsert the nut and tighten it to 40 Nm.
→Once changed, the left and right quick-release axle mountings must both have the same vertical position in the
shock absorber.
The drive wheel camber can also be adjusted in combination with the shock absorber. This is done by inserting a
quick-release axle mounting with the desired angle into the shock absorber (see Page12).
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6.2.3 Adjusting the drive wheel camber
INFORMATION
The adjustments described below may not be carried out on the CLT or CLT Ultra model.
The modular system of the product offers quick-release axle mountings with angled bores for different sloped set
tings of the drive wheels (see fig.12).
The drive wheel camber is adjusted by exchanging the quick-release axle mounting. This has the following effects:
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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
The drive wheel camber can be set to 0°, 2°, 3° and 4°.
1) Unscrew the hexagon nuts on the quick-release axle mounting (see fig.7).
2) Remove the quick-release axle mounting (see fig.8).
3) Prepare the new quick-release axle mounting. The camber is embossed in the quick-release axle mounting (1°,
2°, 4° = 1, 2, 3 dots: see fig.12, item1).
4) Insert the chosen quick-release axle mounting together with the quick-release axle mounting washers (see
fig.9, items2 and 3) and the hexagon nuts (see fig.9, items1 and 4) and tighten it slightly.
INFORMATION: The groove on the quick-release axle mounting respectively faces vertically down and
out (see fig.12, item2).
INFORMATION: The respective chamfered edge of the quick-release axle mounting washers faces out
(see fig.10).
5) Slide the supplied assembly aid (spirit level) onto the quick-release axle with the drive wheel and insert the
quick-release axle into the quick-release axle mounting (see fig.13).
6) The assembly aid must engage in the groove of the quick-release axle mounting (see fig.13, item1).
7) Align the quick-release axle mounting so the spirit level is in the centre position (see fig.14). Tighten the
hexagon nuts to 40Nm (see fig.15).
8) Remove the drive wheel and take off the assembly aid.
9) Reinstall the drive wheel.
→After adjustment, the camber of the left and right drive wheels must be the same.
12 13
14 15
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6.2.4 Adjusting the track width (additional adjustment)
After the mounting nuts have been loosened, the position of the quick-release axle mounting can be adjusted in or
out. This allows the distance between the drive wheel and the side panel to be continuously adjusted.
6.2.5 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.16, item1) in or out.
16
6.2.6 Adjusting the handrims
All handrims are designed for a spacing from the drive wheel of 15mm (standard setting) and 25mm (see fig.17).
1) Loosen/remove the handrim screw connection from the rim.
2) Tightly screw the handrims onto the rim in the narrow or wide installation position (see fig.18).
17 18
6.3 Adjusting the caster wheels
INFORMATION
The adjustments described below may not be carried out on the CLT or CLT Ultra model.
6.3.1 Adjusting the caster journal angle
When the drive wheels have been adjusted for the user, the caster journal angle must be adjusted at the caster
wheel adapter.
The bolt of the caster fork in the caster wheel mounting (see fig.26, item1) must be perpendicular to the ground to
ensure optimum wheelchair driving characteristics. The caster wheel adapter permits adjustment of this angle in
1.5° increments.
INFORMATION: Note that the caster wheel mounting has to be perpendicular to the ground both in the
direction of travel and crosswise to the direction of travel after an angle adjustment. Therefore, always
check the perpendicular position of the caster fork bolt crosswise to the direction of travel while adjust
ing the caster wheel journal angle. Adjust this correctly as needed.
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INFORMATION
The markings that are visible when looking at the wheelchair or caster wheel adapter from the front are relevant
for the adjustments described below. The setting in the range up to ±10.5° (long marking line) is shown in the fol
lowing.
By moving the tenon jointing wheel on the caster wheel adapter, the caster wheel journal angle can be corrected in
1.5° increments starting from the zero position (see fig.19) (scale value 1 corresponds to 1.5°, scale value 2 cor
responds to 3° (see fig.20), etc.):
• Long marking line (see fig.20): settings in the range of 0 to ±10.5°
• Short marking lines (see fig.21): settings in the extended range from ±12°
19 20
21
1) Loosen the Allen head screw on the caster wheel adapter (see fig.22) and remove the cover.
2) Loosen the mounting screw for the caster wheel journal angle (see fig.23) until the tenon jointing wheel on one
side can be loosened from the caster wheel adapter and moves freely on one side (see fig.24).
3) Set the expected appropriate angle (the long marking line on the retainer is applicable). Push the tenon jointing
wheel back into the retainer on one side.
4) Loosen the other side of the tenon jointing wheel from the retainer. Turn the caster wheel adapter until the long
marking line also indicates the same scale position on the tenon jointing wheel (see fig.25).
5) Slightly tighten the mounting screw for the caster wheel journal angle (see fig.23) and, by applying the sup
plied assembly aid, check whether the angle in the direction of travel is close to 90° (see fig.26, item1/2). If
this is not the case, correct it again (see starting at step 2).
6) Also check the perpendicular position of the threaded axle crosswise to the direction of travel:
→To do so, set a spirit level onto the caster head (see fig.27, item1) and check the perpendicular position
(see fig.27, item2).
→If necessary, also slightly loosen the mounting screw of the caster wheel adapter (see fig.27, item3). Move
the threaded axle into the perpendicular position by hand.
7) Tighten the mounting screw for the caster wheel journal angle to 30Nm (see fig.23). Tighten the mounting
screw of the caster wheel adapter to 30Nm (see fig.27, item3).
8) Put on the cover and tighten the Allen head screw (see fig.22).
9) For the caster head on the opposite side, set the tenon jointing wheel to the same scale value.
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22 23
24 25
26 27
6.3.2 Changing the installation position of the caster wheels
INFORMATION
Please refer to the seat height table in the technical data.
The front seat height is adjusted using the row of holes in the fork and the diameter of the caster wheels.
1) Loosen the screw connection on the threaded sleeve (see fig.28).
2) Remove the threaded sleeve and spacer bushings.
INFORMATION: Note that the illustrated and described spacer bushings are not present with all
offered caster wheels.
3) Remove the caster wheel.
4) Insert the threaded sleeve (see fig.29, item1) into the desired hole in the fork and slide on the first spacer
bushing (see fig.29, item2) from the inside.
5) Install the caster wheel (see fig.29, item3).
6) Push on the second spacer bushing (see fig.29, item4).
7) Insert the mounting screw (see fig.29, item5) and tighten the threaded sleeve to 8Nm.
→Once changed, the left and right caster wheels must have the same vertical position in the caster fork.
16
Settings
Avantgarde 4

→After changing the front seat height, always check the caster wheel journal angle and adjust it if necessary (see
Page14).
28 29
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
1) Loosen the Allen head screws between the knee lever wheel lock and the threaded stud in the frame tube (see
fig.30, item1).
2) Adjust the knee lever wheel lock by sliding it (see fig.30, item2). When the wheel lock is disengaged, the gap
between the tyre and wheel lock bolt must not exceed 5mm. (see fig.31).
→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 wheel lock evenly and easily on both sides.
→The wheel lock bolt must lock the drive wheel securely when stationary.
3) Evenly tighten the Allen head screws in the threaded stud to 8Nm.
→After adjustment, the left and right knee lever wheel locks must both have the same braking force.
30
ax. 5
31
17Avantgarde 4
Settings

6.4.2 Adjusting the scissor wheel locks
1) Loosen the Allen head screws in the clamp brackets (see fig.32, item1).
2) Adjust/move the support for the scissor wheel lock to any position in the clamp bracket (see fig.32, 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.32).
→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.33).
4) Tighten both Allen head screws evenly to 12Nm in two passes (see fig.32, item1).
→After adjustment, the left and right scissor wheel locks must both have the same braking force.
32 33
6.4.3 Adjusting the knee lever wheel lock for user and attendant
Presetting (as needed)
1) Loosen the Allen head screws between the knee lever wheel lock and the threaded stud in the frame tube (see
fig.34).
2) Adjust the knee lever wheel lock by sliding it.
When the wheel lock is disengaged, the gap between the tyre and wheel lock bolt must not exceed 5mm (see
fig.35).
→The distance between the wheel lock bolt and the drive wheel must be1–5mmin the unbraked condition.
3) Evenly tighten the Allen head screws in the threaded stud to 8Nm.
Fine adjustment
1) Separate the Bowden cable mounting from the wheel lock bolt (see fig.36, item2).
2) Adjust the Bowden cable in the spring (see fig.36, item1).
3) Clamp the Bowden cable again by tightening the mounting.
→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.
4) If necessary: Shorten the Bowden cable to 10mm after making the adjustments (not illustrated).
34
max. 5 mm
35
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Settings
Avantgarde 4

36
6.4.4 Adjusting the knee lever wheel lock for one-handed operation
INFORMATION
To adjust the brake block on the active side: see the section "Adjusting the knee lever wheel lock".
This adjustment must be made after the drive wheel has been repositioned or during fine adjustment.
Presetting (as needed)
1) Loosen the Allen head screws between the knee lever wheel lock and the threaded stud in the frame tube (not
illustrated, similar process: see fig.34).
2) Adjust the knee lever wheel lock by sliding it.
When the wheel lock is disengaged, the gap between the tyre and wheel lock bolt must not exceed 5mm (sim
ilar illustration: see fig.35).
→The distance between the wheel lock bolt and the drive wheel must be1–5mmin the unbraked condition.
3) Evenly tighten the Allen head screws in the threaded stud to 8Nm.
Fine adjustment
1) Separate the sleeve from the wheel lock bolt (see fig.37).
2) Slide the sleeve onto the Bowden cable (see fig.38).
3) Clamp the Bowden cable by tightening the nut (see fig.37).
→The brake has to operate easily.
→The braking effect must be the same at both wheel lock bolts.
→The wheel lock bolt must lock the drive wheel securely when stationary.
4) If necessary: Shorten the Bowden cable to 10mm after making the adjustments (not illustrated).
37 38
6.4.5 Adjusting the braking force of the drum brake
INFORMATION
After making adjustments, check that activating the manual brake lever creates a sufficient braking effect.
Note that the drum brake must still be able to produce sufficient braking force even when the manual brake lever
is locked into a ratchet position.
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Settings

To achieve an optimum braking effect, the braking force is adjusted using the adjustment screw (see fig.39, item
2).
•Increase the braking force: Back off the adjusting screw.
•Reduce the braking force: Screw in the adjustment screw.
1) Loosen the counter nut (see fig.39, item1) and back off the adjustment screw until a scraping noise can be
heard when the rear wheel is rotated.
2) Screw in the adjustment screw (see fig.39, item2) until the scraping noise at the rear wheel disappears and
the wheel runs freely.
3) Tighten the counter nut (see fig.39, item1) until the adjustment screw is fixed.
→The braking force of both rear wheels must be adjusted equally.
39
6.5 Adjusting the back support
INFORMATION
The adjustments described below may not be carried out on the CLT or CLT Ultra model.
6.5.1 Adjusting the back support height
Depending on the back support system, the back support height can be adjusted by 50mm, 75mm or 100mm.
The back support tube integrated into the rear frame allows the back support height to be adjusted in steps of
25mm.
1) Remove the back support pad.
2) If necessary: Loosen the rear side panel mounting on the frame (see fig.40, item1) and fold away the side
panel.
3) Loosen the back support upholstery (see fig.41).
4) Remove the protective caps and remove the two back support tube mounting screws from the rear frame (see
fig.42).
5) Adjust the back support height as desired (see fig.43, item1).
6) Tighten the removed Allen head screws to 7Nm. Install the protective caps on the hexagon nuts.
→Both back support tubes must be adjusted to the same height.
Properly reassemble all components upon completion of the adjustments. To adjust the back support upholstery:
see Page22.
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Settings
Avantgarde 4