Otto Bock Discovery tmax User manual

Instructions for Use (Qualified Personnel) ............................................... 3
discovery tmax
© Ottobock · 647G734=M_US-04-1202

2 02/2012

Foreword1 5.................................................................................................................................................................
Application2 5..............................................................................................................................................................
Intended Use2.1 5...............................................................................................................................................
Indications2.2 5...................................................................................................................................................
Contraindications2.3 5........................................................................................................................................
Required Qualifications2.4 5...............................................................................................................................
Safety3 6......................................................................................................................................................................
Explanation of Warning Symbols3.1 6................................................................................................................
General Safety Instructions3.2 6.........................................................................................................................
Safety instructions for assembly3.3 7.................................................................................................................
Type Plate3.4 7....................................................................................................................................................
Delivery4 7...................................................................................................................................................................
Scope of Delivery4.1 7........................................................................................................................................
Options4.2 8........................................................................................................................................................
Storage4.3 8........................................................................................................................................................
Preparation for Use5 8................................................................................................................................................
Tools required5.1 8.............................................................................................................................................
Assembly5.2 8.....................................................................................................................................................
Adjustments6 9............................................................................................................................................................
Prerequisites6.1 9...............................................................................................................................................
Settings during Preassembly6.1.1 10..........................................................................................................
Adjusting the Seat Width6.2 10...........................................................................................................................
Adjusting the Width of the Main Frame6.2.1 10...........................................................................................
Adjusting the Width of the Seat Frame6.2.2 10...........................................................................................
Adjusting the Seat Depth6.3 11..........................................................................................................................
Adjusting the Back Angle6.4 11..........................................................................................................................
Adaptation of the Seating Shell/Seating System6.5 12.....................................................................................
Installing a Seating Shell – Otto Bock Shape System (Option)6.5.1 12.......................................................
Removing/Installing a Seat Plate (Option)6.5.2 12......................................................................................
Installing Otto Bock Back Systems (Option)6.5.3 13...................................................................................
Installing other Seating Systems/Back Systems6.5.4 13..............................................................................
Adjusting the Seat Height6.6 13.........................................................................................................................
Adjusting the Locking Pedal6.7 14......................................................................................................................
Adjusting the Footrests/Footplates6.8 15..........................................................................................................
Adjusting the Depth of the Footrest Adapter 6.8.1 15..................................................................................
Other Settings6.8.2 15................................................................................................................................
Checking/Adjusting the Seating Centre of Gravity6.9 15...................................................................................
Adjusting the Side Panels6.10 16.........................................................................................................................
Adjusting the Armrest Depth6.10.1 16...........................................................................................................
Adjusting the Armrest Height6.10.2 16..........................................................................................................
Adjusting the Wheel Adapters6.11 17...................................................................................................................
Adjusting the Knee Lever Wheel Lock6.12 18.......................................................................................................
Adjusting the Tip Assist6.13 19.............................................................................................................................
Adjusting the Anti-Tipper6.14 19...........................................................................................................................
Handover7 20..............................................................................................................................................................
Final Inspection7.1 20.........................................................................................................................................
Transport to the customer7.2 20........................................................................................................................
Delivery7.3 20......................................................................................................................................................
Maintenance/Repair8 21.............................................................................................................................................
Table of contents
302/2012
Table of contents

Table of contents
Disposal9 21................................................................................................................................................................
Disposal information9.1 21.................................................................................................................................
Information on Re-Use9.2 21..............................................................................................................................
Legal Information10 21.................................................................................................................................................
Liability10.1 21.......................................................................................................................................................
CE Conformity10.2 21...........................................................................................................................................
Warranty Terms and Conditions10.3 21................................................................................................................
Appendices11 21...........................................................................................................................................................
Technical Data11.1 21..........................................................................................................................................
4 02/2012

1 Foreword
INFORMATION
Date of the last update: 2012-02-01
►Please read this document carefully.
►Follow the safety instructions.
INFORMATION
Missing instructions for use can be downloaded from the homepage at www.ottobock.com or ordered directly from
Otto Bock Service (see back cover or inside back cover for addresses).
The product was delivered as specified on the order form. Settings must be adjusted and the product must be fine-
tuned according to the medical indications or the needs of the user; this must be done in the presence of the user.
These instructions for use provide the information necessary for adjusting the settings. Adjustments should be made in
close cooperation with the user or attendant.
Please note the following:
• The Instructions for Use (Authorised Personnel) are intended only for qualified authorised personnel and remain
with them.
• The operation of the product is described in the Instructions for Use (User). These instructions must be given to the
user or attendant.
• We recommend checking the product settings regularly in order to assure optimal fit over the long term. A fitting is
required every six months for children and youth in particular.
• The installation/refitting of all optional components is generally described in the service manual.
• Otto Bock assumes no liability for combinations with seating systems that have not been approved by Otto Bock
(see Page21).
2 Application
2.1 Intended Use
The wheelchair is intended exclusively for the adaptation of seating shells and other orthopaedic seating systems for
people who are unable to walk or have walking impediments. It can be operated either by the user or by an attendant.
The product can be used indoors and outdoors. In order to provide an optimised, individual fitting, it is adjustable
and/or adaptable.
The product may only be used with the options which are listed in the product order form.
The Otto Bock warranty applies only when the product is used according to the specified conditions and for the intend
ed purposes.
2.2 Indications
This wheelchair is suitable for fittings for users in all age groups.
The use of various orthopaedic seating systems (e.g. seating shells) and the variety of adjustment possibilities make
the wheelchair suitable for use in case of inability to walk/walking impediments, e.g. due to:
• Paralysis (paraplegia/tetraplegia)
• Loss of limbs (leg amputation)
• Limb defect/deformity
• Joint contractures/defects
• Neurological and muscular diseases
2.3 Contraindications
None.
2.4 Required Qualifications
The adjustment tasks described below are necessary for optimum adaptation to the respective seating system, and
may only be completed by qualified, authorised personnel (orthopaedic authorised personnel, specialist dealers for
rehabilitation products).
502/2012
Foreword

3 Safety
3.1 Explanation of Warning Symbols
WARNING Warnings regarding possible risks of severe accident or injury.
CAUTION Warnings regarding possible risks of accident or injury.
NOTICE Warnings regarding possible technical damage.
3.2 General Safety Instructions
WARNING
Incorrect settings
Risk of falling, tipping over or improper user posture
►Adjustments may be carried out only by qualified personnel instructed by Otto Bock.
►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 "Appendixes"). Please contact Otto Bock if you have any ques
tions.
►Only conduct tests in the presence of an assistant.
►Unless expressly described, you should not change any settings with a person sitting in the product.
►Secure the user against falling out during all tests.
►Activate the anti-tipper during all tests.
►Before testing setting changes with the user seated, firmly tighten all screw connections.
►Check for safe function before handing over the product.
WARNING
Lack of instruction
Risk of falling, tipping over
►Instruct the user in the proper use of the product when handing it over.
►Otto Bock recommends the preparation of an acceptance protocol.
CAUTION
Wearing unsuitable work clothing
Risk of pinching, crushing, being pulled in
►Wear suitable work clothing and, for example, gloves and protective eyewear as necessary when working on the
product.
CAUTION
Use of unsuitable tools
Pinching, crushing or damaging the product
►When working, use only tools that are suitable for the conditions at the workplace and whose proper use ensures
safety and health protection.
NOTICE
Tipping or falling of the product
Damage to the product
►When you work on the product, secure it so that it cannot tip over or fall over.
►Use a clamping device to secure the product for all work at a workbench.
NOTICE
Wrong packaging
Risk of damage to the product
►Use only the original packaging for delivery of the product.
6 02/2012
Safety

3.3 Safety instructions for assembly
CAUTION
Unsecured screw connections
Risk of pinching, crushing, tipping over, falling of user
►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 or secure the
old screw connection with medium strength thread locker (e.g. Loctite 241®).
CAUTION
Improper use of self-locking nuts
Risk of the user falling or tipping over
►Always replace self-locking nuts with new self-locking nuts after disassembly.
CAUTION
Improper assembly of the removable wheels
Risk of the user falling or tipping over
►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 Type Plate
Label Meaning
AType designation
BManufacturer article number
CMaximum load capacity (see the chapter "Technical Data")
DManufacturer information/address/country
ESerial number
FEuropean Article Number/Global Trade Item Number
GRead the instructions for use before using the product.
The type label is located on the front connect
ing tube of the base frame. HCE marking – product safety according to EU guidelines
Seat angle setting indicator °
(Only in case of anchor point system installation)
Mounting point/anchor point system for attaching the product in
a wheelchair accessible vehicle
4 Delivery
4.1 Scope of Delivery
The product is delivered pre-assembled, with the rear wheels removed (in case of the plug-on version) and packed in a
crate.
The scope of delivery includes:
• Pre-assembled wheelchair
• 2 rear wheels (screwed or plug-on)
• Footrests
• Options as ordered
• Instructions for Use (Authorised Personnel)/Instructions for Use (User)
702/2012
Delivery

INFORMATION
Only provide the Instructions for Use (User) to the user.
Seating shells/seat cushions are not included in the scope of delivery and must be ordered separately.
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
The wheelchair must be stored in a dry place.
For transportation and storage, an ambient temperature between -10 °C and +40 °C must be maintained.
During extended storage, the knee lever wheel lock on wheelchairs with PU tyres must be released since tyre deforma
tion may otherwise result.
Note regarding the tyres
• Tyres contain chemical substances that can react with other chemical substances (such as cleaning agents, acids,
etc.).
• Direct exposure to sunlight/UV radiation causes the tyres to age more quickly. As a result, the tread surface hard
ens and corner pieces break out of the tread.
• Avoid unnecessary parking outdoors. The tyres should be replaced every 2 years regardless of wear and tear.
5 Preparation for Use
5.1 Tools required
The following tools are required to make fine adjustments/setting changes:
• Allen key, size 3/4/5 mm
• Ring/open-end wrench, size 10/19/24
• Socket wrench, size 10/19
• Phillips screwdriver, size 2
• Flat screwdriver, size 3
• Torque wrench (measurement range 5-50 Nm)
5.2 Assembly
CAUTION
Loss of stability due to additional objects on the product
Tipping, falling from the seating shell/seating system, breakage of load-bearing components
►Do not attach additional objects to the frame, cross tubes or seat.
CAUTION
Breakage of load-bearing components due to overloading
Falling, tipping, injuries due to frame breakage
►Do not exceed the maximum load capacity (see chapter "Technical Data").
CAUTION
Improper assembly of the removable wheels
Risk of the user falling or tipping over
►After each assembly, verify the proper fit of the removable wheels. The quick-release axles must be firmly locked
in the wheel attachment.
CAUTION
Incorrect air pressure
Risk of falling, uncontrolled driving characteristics, tyre rupture
►Maintain sufficient air pressure. Do not exceed the maximum specifications when filling the tyres (see the chapter
"Technical Data").
►Do not use the wheelchair with over/under-inflated or unequally inflated tyres.
►Note that a single tyre with low air pressure can lead to uncontrolled driving characteristics.
►Note that low rear tyre pressure can reduce the braking force of the knee lever wheel lock.
8 02/2012
Preparation for Use

INFORMATION
In general, only metric screws are used on the product.
Exception: axle mounting of the 12" rear wheels (1/2" hexagon head screw + hexagon nut)
INFORMATION
With the combination of Allen head screw/hexagon nut, a higher torque can be transmitted using the hexagon nut
than the Allen head screw.
Please note that the Allen head screw is only intended to be held in place so it does not turn when tightening/loosen
ing the hexagon nut.
1) For plug-on rear wheels: slide the rear wheels onto the wheel attachments of the wheel adapters. The quick-
release axles must not be removable after releasing the pushbutton.
2) Slide the footrests into the holders on the front frame tube.
3) Fold the footplates down. If necessary, insert the calf band and adjust it.
4) Prior to the adaptation of the seating shell/seating system, further wheelchair settings must be adjusted as required
(see Page9 et. seq.).
6 Adjustments
6.1 Prerequisites
WARNING
Incorrect settings
Risk of falling, tipping over or improper user posture
►Adjustments may be carried out only by qualified personnel instructed by Otto Bock.
►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 "Appendixes"). Please contact Otto Bock if you have any ques
tions.
►Only conduct tests in the presence of an assistant.
►Unless expressly described, you should not change any settings with a person sitting in the product.
►Secure the user against falling out during all tests.
►Activate the anti-tipper during all tests.
►Before testing setting changes with the user seated, firmly tighten all screw connections.
►Check for safe function before handing over the product.
WARNING
Failure to verify tipping resistance
Risk of the user falling or tipping over
►Changing the settings can lead to instability of the system as a whole. Verify tipping resistance after any changes
to the settings.
CAUTION
Unsecured screw connections
Risk of pinching, crushing, tipping over, falling of user
►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 or secure the
old screw connection with medium strength thread locker (e.g. Loctite 241®).
CAUTION
Improper use of self-locking nuts
Risk of the user falling or tipping over
►Always replace self-locking nuts with new self-locking nuts after disassembly.
Fine adjustments and setting changes 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.
902/2012
Adjustments

6.1.1 Settings during Preassembly
If the seating shell/seating system as well as the back system have already been preassembled, the following chapters
can be omitted:
• Chapter "Adjusting the Seat Width" (see Page10)
• Chapter "Adjusting the Seat Depth" (see Page11)
• Chapter "Adjusting the Back Angle" (see Page11)
• Chapter "Adaptation of the Seating Shell/Seating System" (see Page12)
6.2 Adjusting the Seat Width
6.2.1 Adjusting the Width of the Main Frame
Within the allowable adjustment range, the width of the main frame can be adapted to the width of the chosen seating
shell or seating system:
1) Remove the seat frame from the main frame (see Page13).
2) Loosen 4 x Allen head screws on each of the adjustment tubes at the rear (see Fig.1, item 1) and front (see Fig.2,
item 2).
3) Adapt the width on the adjustment tubes, preferably making it symmetrical.
INFORMATION: The connection between the adjustment tube and frame always has to be realised on both
sides with 2 Allen head screws (use inner 2 bores).
INFORMATION: If required, an asymmetry of 12.5 mm (1/2") is allowable when adapting the adjustment
tubes. The asymmetry must be on the same side on all adjustment tubes. However, the allowable adjust
ment range must not be exceeded.
Firmly retighten all Allen head screws to a torque of 10 Nm.
4) Mount the seat frame on the main frame (see Page13).
1 2
6.2.2 Adjusting the Width of the Seat Frame
INFORMATION
►Before adjusting the seat frame, the main frame needs to be adjusted (see the preceding chapter).
►In case of a seating shell/seating system preinstalled at the factory, these settings do not have to be changed.
The width of the seat frame can be adapted to the width of the chosen seating shell or seating system.
1) When using a seat plate: remove the seat plate (see Page12).
2) Remove the seat frame from the main frame (see Page13).
3) Loosen 4 x Allen head screws on each of the connecting tubes at the front (see Fig.3, item 1) and rear (see Fig.3,
item 2).
4) Loosen 2 x Allen head screws with counter nuts on the connecting tube of the central seat fork (see Fig.3, item 3).
5) Loosen 2 x Allen head screws with counter nuts on the locking bar (see Fig.3, item 4).
6) With push bar option: loosen 2 x Allen head screws on the connecting tube (see Fig.4, item 5).
7) Adjust the width on all connecting tubes, preferably making it symmetrical.
INFORMATION: If required, an asymmetry of 12.5 mm (1/2") is allowable when adapting the connecting
tubes. The asymmetry must be on the same side on all connecting tubes. However, the allowable adjustment
range must not be exceeded.
When using a seat plate: reinstall the seat plate (see Page12).
8) Tighten all Allen head screws to the following torque values:
→Item 1/2/3: 10 Nm
10 02/2012
Adjustments

→Item 4: Allen head screws – 8 Nm; counter nut – 10 Nm
→Item 5: 8 Nm
►Mount the seat frame on the main frame (see Page13).
3 4
6.3 Adjusting the Seat Depth
The seat depth can be changed by vertically adjusting the back tubes on the seat frame.
1) When using a seat plate: remove the seat plate (see Page12).
2) Loosen 2 x Allen head screws on the back plate/seat frame connection on both sides (see Fig.5, item 1) and
remove the rear connecting tube (see Fig.6, item 1).
3) If a lashing point is installed, also loosen the 1 x Allen head screw /1 x pin (see Fig.5, item 2/3).
4) Adjust the seat depth: slide the back plates to the desired depth position (see Fig.6, item 2).
INFORMATION: Ensure that the angle position is not changed (use the same bore). After adjusting the back
plate, reinstall the rear connecting tube.
5) When using a seat plate: reinstall the seat plate (see Page12).
6) Tighten all Allen head screws to 10 Nm.
5 6
6.4 Adjusting the Back Angle
CAUTION
Unallowable back angle
Risk of the user falling or tipping over
►A back angle setting greater than 30° is not permitted.
INFORMATION
►Ensure the angle setting is symmetrical on both sides of the back frame.
►Note that the seating position may have to be readjusted for an optimum seating centre of gravity.
The back angle can be adjusted from -5° to +30° off the vertical position.
1102/2012
Adjustments

+30° -5°
7
a) Angle adjustment in 10° increments
1) Loosen the upper Allen head screw on the back plate (see Fig.8, item 1).
2) Loosen and remove the angle adjustment screw on the back plate (see Fig.8, item 2).
3) Adjust the backrest to the desired angle with the help of the existing bores.
4) Tighten all Allen head screws to 10 Nm.
5) Proceed the same way on the other side.
b) Setting 5° interim angles
1) Loosen the front Allen head screw (see Fig.9, item 1).
2) Loosen and remove the rear Allen head screw (see Fig.9, item 2).
3) With installed lashing point: loosen 1 x Allen head screw/1 x anchor point (see Fig.9, item 3).
4) Adjust the backrest angle by 5°. Use the available bore for this purpose.
5) Tighten all Allen head screws to 10 Nm.
6) Proceed the same way on the other side.
8
5°
9
6.5 Adaptation of the Seating Shell/Seating System
6.5.1 Installing a Seating Shell – Otto Bock Shape System (Option)
This option may only be installed by Otto Bock at this time.
6.5.2 Removing/Installing a Seat Plate (Option)
INFORMATION
The preinstalled seat plate can continue to be used within the approved adjustment range.
For removal/installation within the scope of adjustments or retrofitting a new seat plate, complete the following steps:
a) Removal/installation to adjust the width of the seat frame
1) Loosen all mounting screws (countersunk head screws) between the seat plate and seat plate supports (see
Fig.10, item 1).
2) After adjusting the frame width, (see Page10) position the seat plate:
→The front of the seat plate is flush with the front of the lateral tubes of the seat frame (see Fig.10, item 2).
→The seat plate is centred between the lateral tubes of the seat frame.
12 02/2012
Adjustments

3) Tighten all mounting screws to a torque of 10 Nm.
b) Removal/installation to adjust the seating centre of gravity
To adjust the seating centre of gravity (see Page15), it may be necessary to shift the seat plate supports if they
impede the adjustment of the seating centre of gravity on the seat adapter.
1) Loosen all mounting screws (countersunk head screws) between the seat plate and seat plate supports (see
Fig.10, item 1).
2) Loosen the clamping screws on the seat plate supports (see Fig.11, item 1).
3) Slide the seat plate supports to the desired position. Ensure that the seat plate supports are distributed as evenly
as possible on the cross tubes.
4) Tighten all clamping screws of the seat plate supports to a torque of 10 Nm.
5) Tighten all seat plate mounting screws to a torque of 10 Nm.
10 11
6.5.3 Installing Otto Bock Back Systems (Option)
This option may only be installed by Otto Bock at this time.
6.5.4 Installing other Seating Systems/Back Systems
In principle, it is possible to install third-party seating systems/back systems on the product. In this case, liability rests
with the authorised personnel that completed the installation.
Installation by Otto Bock Custom Fabrication is possible with a separate order.
Otto Bock assumes no liability for combinations with seating systems that have not been approved by Otto Bock (see
Page21).
6.6 Adjusting the Seat Height
CAUTION
Installation without an assistant
Pinching on components, damage to the seat
►Always get help from an assistant to adjust the seat height.
The seat height can be modified/adapted if necessary – e.g. to obtain more ground clearance for the footplates
because of long lower legs.
1) Remove the locking mechanism linkage (see Page14).
2) Loosen 2 x Allen head screws on both sides between the seat frame and main frame (see Fig.12, item 1). Have
the assistant hold the seat during this process.
3) Select the new seat height. Move the seat up or down in the adapter tube in order to do so.
INFORMATION: Note the allowable seat height settings (see the chapter "Technical Data"). Please note that
excessive seat height can lead to overall system instability with large/heavy seating shells.
4) Firmly retighten all Allen head screws to a torque of 10 Nm.
5) Adjust/install the locking mechanism linkage (see Page14).
1302/2012
Adjustments

12
6.7 Adjusting the Locking Pedal
CAUTION
Incorrect setting of the locking mechanism linkage
Falling from the seating shell, malfunction, damage to/destruction of the release mechanism
►Adjust the length of the locking mechanism linkage so that the locking pins fully engage in the locking plate in the
seat frame and the locking mechanism is in the front position. Only then is the support of the seat assured with
extreme settings or when driving over rough surfaces.
►Secure the screw connections of the locking mechanism linkage so it is free of tension, without pulling or pushing.
Changing the seat height (see Page13) or the positions of the wheel adapters (see Page17) requires changing the
length of the locking mechanism linkage.
1) Loosen 2 x Allen head screws on the locking mechanism linkage (see Fig.13, item 1).
2) Change the seat height or the position of the wheel adapters.
3) Prior to assembly, determine the correct length of the locking mechanism linkage:
→The locking pedal must be in the neutral position (see Fig.13: pedal is up against the stop at the top).
→The locking pins must be fully extended (see Fig.14, item 1).
→The locking mechanism must be in the forward position (neutral position).
4) Secure the screw connections of the locking mechanism linkage so it is free of tension (without pushing or pulling,
straight in one plane). Use suitable slotted holes in order to do so.
5) Tighten the Allen head screws to a torque of 8 Nm.
Testing the locking mechanism
Carry out a functional test after assembly is complete. Note the following:
• The locking pins must fully engage in the locking plate. Reference point: the locking pins protrude slightly from the
locking plate (see Fig.14, item 1).
• It must be possible to depress the locking pedal to the stop without a lot of force. The mechanism unlocks com
pletely in this process. Reference point: the locking pins are recessed 1–2mm in the plastic locking mechanism
housing.
13 14
14 02/2012
Adjustments

6.8 Adjusting the Footrests/Footplates
CAUTION
Improper footrest/footplate settings
Risk of falling, tipping over
►After changing the footrest/footplate settings, verify that the footrests/footplates do not collide with the caster
wheels at any of the seat tilt settings (seat inclination). The minimum distance between the footrest/footplate and
the caster wheel should be 25 mm.
►Note that with certain footplate settings, the footplate can collide with the caster wheels.
The footplates are the supporting surfaces for the feet.
Their distance from the seat bottom influences sitting stability. The height adjustment acts on the pelvis and ischial
bones. The angle of the footplate should permit a comfortable ankle position.
6.8.1 Adjusting the Depth of the Footrest Adapter
The depth of the various footrests can be adjusted by moving the footrest adapters in the hole channel of the seat
frame members.
1) Loosen the Allen head screws on the seat frame (see Fig.15, item 1).
2) Remove the lashing point if applicable.
3) Slide the footrest adapters to the desired position (see Fig.15, item 2).
INFORMATION: Note the minimum insertion depth. The footrest adapters need to be secured with 2 screws.
4) Firmly retighten all Allen head screws to a torque of 10 Nm.
15 16
6.8.2 Other Settings
The following adjustments are described in more detail in the included instructions for use (user) for all footrests that
are offered – reference number 647G733:
• Adjusting the lower leg length
• Adjusting the footplate angle
6.9 Checking/Adjusting the Seating Centre of Gravity
CAUTION
Improper adjustment of the seating centre of gravity
Risk of tipping over, falling from the seating shell/seating system
►Avoid extreme settings that could lead to tipping when adjusting the seat angle.
►Always choose centre of gravity settings so that the holding forces are as low as possible for the attendant.
►For transfemoral amputees, shift the seating centre of gravity forward. This improves the stability of the wheel
chair.
►Do not reach into the adjustment mechanism when changing the seat tilt settings.
Checking the seating centre of gravity is required in order to ensure that the seat angle can be adjusted easily when
the user is seated.
In principle, the centre of gravity adjustment has the following effects:
Seating centre of gravity Effect
Too far in front of the pivot point Seat tilts far forward when it is unlocked;
high holding forces required during seat adjustment.
1502/2012
Adjustments

Seating centre of gravity Effect
Too far behind the pivot point Seat tilts far backward when it is unlocked;
high holding forces required during seat adjustment.
Setting recommendations
The seating centre of gravity should be individually adjusted according to the clinical picture.
The authorised personnel has to decide whether it is better that the seat swings forward or backward when no holding
force is applied while the locking mechanism is released. If possible, the attendant who will later push the wheelchair
should be consulted here.
Setting the seating centre of gravity
1) Loosen 3 x clamping screws on each of the seat adapters on both sides (see Fig.17, item 1; see Fig.18, item 2).
2) Only if necessary: loosen the seat plate supports if they obstruct the adjustment of the seat adapters(see
Page12).
3) Slide the seat to the assumed seating centre of gravity on both sides.
4) Tighten all clamping screws to a torque of 10 Nm.
5) Conduct a functional test of the locking mechanism:
→Tilt the seat, e.g. to 25°, and lock it.
→Ensure that the tipping movement and locking function operate easily.
6) Test the seating centre of gravity setting:
→Sit the user in the seat with the help of an assistant.
→Tilt the seat and hold it in position. Only low holding forces should be required for tilting.
Adjusting the seating centre of gravity
If the results are not satisfactory, the setting has to be readjusted without the user in the seat, as follows:
Problem Solution
Seat tilts far forward when it is unlocked;
large holding forces required during seat adjustment
Open the seat clamp and slide the seat back
Seat tilts far backward when it is unlocked;
large holding forces required during seat adjustment
Open the seat clamp and slide the seat forward
17 18
6.10 Adjusting the Side Panels
6.10.1 Adjusting the Armrest Depth
The armrest position can be adjusted to the forearm length.
1) Loosen 2 x Allen head screws on the bottom of the armrest (see Fig.16, item 1).
2) Slide the armrest forward or backward along the connection tube to the desired position.
3) Insert 2 x Allen head screws into the originally used bore holes and tighten to 8Nm.
6.10.2 Adjusting the Armrest Height
Adjusting the armrest height is described in more detail in the included instructions for use (user), reference number
647G733.
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Adjustments

6.11 Adjusting the Wheel Adapters
CAUTION
Incorrectly adjusted wheelbase
Risk of the user falling or tipping over
►Only adjust the wheel adapter after completing the adjustments described above.
►Maximum stability is reached in the far rear position (wheel adapter is up against the stop screw: see Fig.20,
item 2). When the wheel adapter is moved forward, the stability of the wheelchair decreases.
►Avoid extreme settings that could lead to tipping when adjusting the seat angle.
►Adjust the wheelbase so that the person pushing the wheelchair has to exert little force to tip it.
►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.
►Be sure to position the rear wheels towards the rear for transfemoral amputees. This improves the stability of the
wheelchair.
►Changing the size and position of the rear wheels may cause the caster wheels to wobble at higher speeds. If
changes are required, verify the horizontal alignment of the main frame.
INFORMATION
►To change the position of the wheel adapter, the knee lever wheel lock first has to be loosened and subsequently
readjusted (see the chapter "Adjusting the Knee Lever Wheel Lock").
►The position of the wheel attachment bushings in the wheel adapter was matched to the chosen rear wheel
size/caster wheel size at the factory.
The wheel adapter can be shifted on the main frame. This has the following effects:
Wheel adapter/rear wheel position Effects
Shifting to the rear (farther away from the
seating centre of gravity)
Larger wheelbase; tipping resistance increases;
wheelchair is harder to tip backwards when crossing obstacles;
larger forces required for tipping
Shifting forward (closer to the seating cen
tre of gravity)
Smaller wheelbase; tipping resistance is reduced;
wheelchair is easier to tip backwards when crossing obstacles;
lower forces required for tipping
Setting recommendations
Depending on the clinical picture of the user, the intended area of application and the experience/strength of the atten
dant, the position of the wheel adapter can be individually readjusted. The adjustments should be made as follows:
• Little force needs to be exerted when tipping up the wheelchair.
• The wheelchair will stand stable at all times on slopes/inclines.
Adjusting the wheel adapter
1) Loosen the locking mechanism linkage (see Page14).
2) If necessary, loosen the knee lever wheel and remove the rear wheels.
3) Loosen 3 x Allen head screws on the wheel adapter on both sides (see Fig.19/see Fig.20, item 1).
4) Adjust the depth of the wheel adapter on both sides at the same time. Avoid tilting or canting.
5) Slightly tighten all Allen head screws.
6) Verify even positioning. In order to do so, measure the distance from the end of the frame tube to the back edge
of the adapter (see Fig.19, item 2). The maximum allowable deviation is 1 mm.
7) Firmly retighten all Allen head screws to a torque of 10 Nm.
8) Mount the locking mechanism linkage (see Page14).
9) Readjust the knee lever wheel lock (see Page18).
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Adjustments

19 20
6.12 Adjusting the Knee Lever Wheel Lock
CAUTION
Insufficient braking action of the knee lever wheel lock
Risk of accidents, falling
►Maintain sufficient air pressure in pneumatic tyres. For the correct air pressure, see the chapter "Technical Data".
When the rear wheel position is changed (adjusting the wheel adapter) or in case of readjustment, the knee lever
wheel lock must be adjusted on both sides.
After changing the position of the rear wheel, Otto Bock recommends adjusting the knee lever wheel lock by shifting it
on the frame.
Adjustment by shifting on the frame (standard setting)
1) Loosen 2 x Allen head screws on the clamping plate of the knee lever wheel lock (see Fig.21/see Fig.23, item 1).
2) Slide/adjust the clamping plate on the frame (see Fig.21/see Fig.23, item 2). When the wheel lock is not
engaged, the gap between the tyre and the wheel lock bolt should be 5mm max. (see Fig.22/see Fig.24).
3) Tighten all Allen head screws to a torque of 10 Nm.
INFORMATION: After adjustment, the left and right knee lever wheel lock must have the same braking force.
Adjustment by sliding in the slotted hole (fine tuning if needed)
1) Loosen 2 x Allen head screws on the slotted hole of the clamping plate (see Fig.21/see Fig.23, item 3).
2) The knee lever wheel lock is continuously adjustable in the slotted hole (see Fig.21/see Fig.23, item 4). When the
wheel lock is disengaged, the gap between the tyre and wheel lock bolt must not exceed approx. 5mm (see
Fig.22/see Fig.24).
3) Tighten all Allen head screws to a torque of 10 Nm.
INFORMATION: After adjustment, the left and right knee lever wheel lock must have the same braking force.
21
max. 5 mm
22
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Adjustments

23
max. 5 mm
24
6.13 Adjusting the Tip Assist
The depth of the tip-assist can be changed. It must be adjusted after changing the seating centre of gravity.
1) Loosen the Allen head screw (see Fig.25).
2) Slide the tip-assist in the main frame as required.
3) Tighten the Allen head screw to a torque of 10 Nm.
25
6.14 Adjusting the Anti-Tipper
CAUTION
Incorrect fitting of anti-tipper / missing anti-tipper
Risk of tipping of the user to the rear
►Check correct installation and adjustment of the anti-tipper:
►Depending on the adjustment of the chassis, the wheelchair centre of gravity and the experience of the user, an
anti-tipper may be necessary.
CAUTION
Incorrect anti-tipper setting
Risk of tipping over, falling, loss of functionality
►After it is adjusted, the anti-tipper always has to protrude a few centimetres beyond the outer radius of the rear
wheel.
►Length and height adjustments must always be done the same way on both sides.
►After making adjustments, take note of the sound made by the tripod spring as it engages.
►After making any adjustments to the product, verify the proper functionality of the anti-tipper. Adjust the anti-tipper
if needed.
If the anti-tipper settings need to be adjusted (e.g. when changing the seat height, wheel size or position of the wheel
adapter), the anti-tipper can be adjusted in both length and height.
1902/2012
Adjustments

a) Adjusting the length
The length adjustment of the anti-tipper must not be realised via the ratchet mechanism, but only by changing the posi
tion of the cross tube:
1) Press in the tripod spring and remove the anti-tipper from the cross tube (see Fig.26, item 1).
2) Loosen/remove the Allen head screws on the cross tube (see Fig.26, item 2).
3) Adjust the depth of the cross tube. Use the existing bores in the cross tube for this purpose.
4) Tighten the Allen head screw on the cross tube to a torque of 8 Nm.
5) Push in the tripod spring and slide the anti-tipper into the cross tube.
INFORMATION: After making this adjustment, the anti-tipper has to protrude a few centimetres beyond the
outer radius of the rear wheel. The anti-tipper must be fully inserted into the cross tube.
6) Visually check that the anti-tipper has engaged.
b) Adjusting the height
1) Push in the tripod spring (see Fig.27, item 1).
2) Adjust the height of the anti-tipper in the anti-tipper adapter (see Fig.27, item 2).
INFORMATION: The anti-tippers must be no more than 5 cm above the floor.
3) Visually check that the anti-tipper has engaged.
26 27
7 Handover
7.1 Final Inspection
A final inspection is required before the product is delivered:
• Are all options installed according to the order form?
• Do the wheels turn easily?
• Is the seating shell/seating system correctly adapted to the user?
• Is the seating centre of gravity adjusted correctly?
• Are the footplates/side panels adjusted correctly?
• Is the wheel adapter mounted with the specified torque?
• Can the quick-release axles be easily removed?
• For pneumatic tyres: is the tyre pressure correct (see the section "Technical Data")?
• Have the wheel locks been adjusted correctly?
• Is the anti-tipper mounted and adjusted correctly?
• Have all screws been properly tightened?
7.2 Transport to the customer
The wheelchair should be transported to the user in disassembled state using the outer packaging.
7.3 Delivery
The following steps should be performed for the safe delivery of the wheelchair:
• Seating trials were conducted with the user while adjusting the settings. Proper positioning according to medical
aspects must once again be verified upon delivery (seating position, position of the arm rests/footrests).
• In order to ensure that the seat tilt feature operates smoothly, final verification of the seating centre of gravity is
required with the seated user and the designated attendant; adjustments must be made if necessary. The seating
centre of gravity must be set so that the attendant can change the angle effortlessly.
20 02/2012
Handover