Otto Bock Blizzard User manual

Blizzard
Service Manual
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Service Manual for the Blizzard Wheelchair for Active Use
Table of Contents Page
1 Introduction ................................................................................................................... 2
1.1 Preface................................................................................................................. 2
1.2 Technical Support................................................................................................ 2
1.3 Symbol Legend .................................................................................................... 3
2 General Safety Instructions ..........................................................................................3
3 Required Tools and Maintenance Plan.......................................................................... 5
3.1 Required Tools ..................................................................................................... 5
3.2 Maintenance Plan ................................................................................................ 7
4 Settings/Replacement/Retrot................................................................................. 8
4.1 Component Group A: Frame ............................................................................... 8
4.2 Component Group B: Footrest .......................................................................... 12
4.3 Component Group C: Seat ................................................................................ 14
4.4 Component Group D: Back / Push Handles ..................................................... 15
4.5 Component Group E: Side Panels..................................................................... 18
4.6 Component Group F: Casters............................................................................ 21
4.7 Component Group G: Rear Wheels ................................................................... 23
4.8 Component Group H: Wheel Lock..................................................................... 28
5 Technical Data............................................................................................................. 32
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1 Introduction
1.1. Preface
Regular maintenance is important. It increases safety and prolongs the service life of the prod-
uct.
All Mobility products should be inspected and serviced once a year.
However, if the product is used frequently, or if it is used by growing children or patients with
changing clinical conditions, we recommend readjusting and servicing the product every 6
months.
Use only original spare parts for all service and maintenance.
The service and maintenance described in this manual should be performed by trained spe-
cialists only and not by the user.
This service and maintenance manual refers to the spare parts catalogs and instructions for
use manuals for the products described. For this reason, it is important to use these docu-
ments together.
Use the maintenance plan (check list) as a template for making copies. Retain completed main-
tenance plans and provide the customer with a copy.
Instructions for use Spare parts catalog
Blizzard 647G422=D/GB
1.2. Technical Support
The Otto Bock Team of your country will be pleased to answer your technical questions. Con-
tact addresses and telephone numbers are listed on the last page of this manual.
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1.3. Symbol Legend
Caution!
Warning of damages to persons.
Attention!
Warning of product damages.
Note!
Useful tips for the technician.
Read!
Please read the Instructions for Use first!
2 General Safety Instructions
Observe the following guidelines for maintenance or repair work:
Caution!
Use appropriate tools (refer to pages 5 & 6).
Caution!
Wear appropriate clothing, including gloves and safety glasses, if necessary.
Attention!
Secure the product to prevent it from tipping over or falling off the workbench.
Read!
Read the service and maintenance instructions before starting.
Read!
Familiarize yourself with the functions of the product. If you are not familiar with the prod-
uct, read the instructions for use manual before inspecting the product.
Attention!
If you do not have an instructions for use manual, you can order one from the manufacturer
(see the overview of all Otto Bock Branches "Otto Bock Worldwide").
Attention!
Alternatively, you can download documents from our home page at www.ottobock.de
or www.ottobock.com.
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Attention!
Clean or disinfect the product before starting inspection. See the instructions for use manual
for care instructions or specific product inspection information.
Attention!
Many of the screw fastenings use thread lock or nylock nuts. If you have to undo such
screw fastenings, replace the nut or screw with a new nut/screw with thread lock. If new
screws or nuts with thread lock are not available, use a medium-strength liquid thread lock
substance (such as Loctite 241 or Euro Lock A24.20).
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3 Required Tools and Maintenance Plan
3.1. Required Tools
The following list shows you the tools and auxiliaries required for the service.
Reversible ratchet handle wrench
and sockets, sizes 8 mm - 24 mm
Torque wrench,
measurement range 5 Nm to 50 Nm
Wrenches, sizes 8 mm - 24 mm*
Allen wrenches, sizes 3 mm - 6 mm* Phillips head screwdriver, size 2
Screwdrivers,
blade widths 2.5, 3.5, and 5.5 mm
Hammer, approx. 300 g
Plastic hammer Stanley knife with sickle hooked
blade and standard blade
* Contained in 481C08=ST010 Tool Set
Liquid thread lock "medium strength"Side cutting pliers Pop rivet gun for rivets up to ø 5 mm
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Workbench as well as a vise with
plastic jaws and rubber insert
Hand drill Tire mounting levers*,
inner tube repair kit*
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Maintenance Plan
for regular service
Blizzard
- Wheelchair for active use -
Customer:
Item Component (group) Inspection (check list)
Serial no.: 1.) Function / setting
(refer to 647G422 Instructions for Use)
2.)
Damages /
deformations
3.)
Screw connections
A Frame - Frame x x
Frame Accessories - Anti-tipper
- Transport wheels
- Crutch holder
- Tip-assist
- Frame pads
x
x
x
x
x
x
x
x
x
B Footrest - Flip-up mechanism
- Lower leg length setting
- Angle adjustment
x
x
x
x
x
x
C Seat - Seat upholstery
- Seat cushion
x
x
D Back / Push Handle - Back upholstery
- Back tubes
- Folding mechanism
- Push handles
x
x
x
x
x
x
x
E Side Panel - Height setting
- Slide-down mechanism
- Removability
x
x
x
x
x
x
F Caster - Tires (wear)
- Air pressure
- Caster journal angle
- Screw connection of the caster
journal bearing
- Running behavior of the wheels
- Threaded axles / quick-release
axles
- Swiveling of the wheel forks
x
x
x
x
x
x
x
x
x
x
x
G Rear Wheel - Tires (wear)
- Air pressure
- Running behavior of the wheels
- Spokes
- Push rings
- Quick-release axles
- Wheel camber
- Rear wheel attachment
x
x
x
x
x
x
x
x
x
x
x
x
x
Rear Wheel Accessories - Spoke protectors
- Wheelbase extension
x
x x
H Wheel Lock - Brake function
- Lever mechanism
x
x
x
x
Wheel Lock Accessories - Wheel lock lever extension x x
S Accessories - Lap belt x x
Do the settings of the wheel-
chair comply with the user's
requirements?
Maintenance performed by: on:
3.2. Maintenance Plan
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4 Settings / Replacement / Retrofit
4.1. - Frame
4.1.1.Retrot/ReplacementoftheAnti-tipper
First remove the rear wheels by pressing the button of the quick-release axle with your
thumb and pulling off the wheel (Fig. 1). Fully loosen the two screws on the front of the
rear wheel attachment (Fig. 2) and remove them. Now pull the U-shaped section off to the
rear.
Slide the pre-assembled anti-tipper onto the rear wheel axle, which is now freely acces-
sible, past the rear wheel adapter, until the (hexagonal) attachment of the anti-tipper is
located on the hexagon of the axle (Fig. 3).
Fix the anti-tipper using the clamping screw (Fig. 4) and test the swing-away and locking
function.
Reinstall the rear wheel attachment and attach the wheels by repeating the steps described
above in the reverse sequence.
Figure 1 Figure 2
Figure 3 Figure 4
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4.1.2.Retrot/Replacement/SettingoftheTransportWheels
First proceed as described in section 4.1.1.: On both sides, remove the rear wheels and the
U-shaped profiles from the rear wheel adapter.
Slide the pre-assembled transport wheels on both sides onto the freely accessible rear
wheel axle, until the (hexagonal) attachments of the transport wheels are located on the
hexagons of the axle (Fig. 5). Fix the transport wheel attachments using the clamping
screws.
To change the setting of the transport wheels, press the spring-mounted buttons inwards
and slide the transport wheels into the desired position (Fig. 6). They will automatically
engage when reaching a free locking position.
4.1.3.Retrot/Replacement/SettingoftheTip-Assist
First proceed as described in section 4.1.1.: Remove the rear wheels and the U-shaped
profile from the rear wheel adapter.
Slide the pre-assembled tip-assist onto the rear wheel axle, which is now freely accessible,
past the rear wheel adapter, until the (hexagonal) attachment of the tip-assist is located on
the hexagon of the axle (Fig. 7). Fix the attachment using the clamping screw.
To change the setting, please proceed analogously to the transport wheels, see section
4.1.2.
Figure 5 Figure 6
Figure 7
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4.1.4.Retrot/ReplacementoftheCrutchHolder
First proceed as described in section 4.1.1.: Remove the rear wheels and the U-shaped
profile from the rear wheel adapter.
Slide the pre-assembled crutch holder onto the rear wheel axle, which is now freely acces-
sible, past the rear wheel adapter, until the (hexagonal) attachment of the crutch holder is
located on the hexagon of the axle (Fig. 8).
Fix the crutch holder using the clamping screw.
Reinstall the rear wheel attachment and attach the wheels by repeating the steps described
above in the reverse sequence.
Attach the hook and loop strap for guidance of the crutches to the back tube.
To replace the bucket, loosen the screw connection on the bottom and remove the bucket
(Fig. 9). Attach a new bucket and fix it using the previously removed screws.
Figure 9
Figure 8
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4.1.5.RetrotoftheFramePads
Wrap the frame pads around the front frame tubes as in the picture and close the hook and
loop closure (Fig. 10).
Use a mild household cleaner to clean the frame pads.
Figure 10
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4.2. - Footrest
4.2.1. Setting the Lower Leg Length / Replacing the Footrest
Loosen the four screws on the inside of the caster attachment device until the footrest bar
can be moved in the frame tube (Fig. 11). Set the desired lower leg length by moving the
footrest ahead or back evenly. Ensure that the footrest bar is in the same position on both
sides. Retighten the screws.
If it not possible to set the desired lower leg length, because the footrest bars are too long
or too short, the footrest must be replaced. To do this, loosen the four screws until the foot-
rest can be removed completely (Fig. 12). Replace it with a new footrest of the correspond-
ing size. For assembly, please proceed as described above.
4.2.2. Replacing the Footplate
Completely loosen the two screws in the middle of the footplate and remove the footplate
(Fig. 13). If you want to continue using the angle adjustment, leave it where it is; otherweise
bend it open as far as necessary and pull it off the tube. Push a new angle adjustment onto
the tube (Fig. 14), reattach the footplate and tighten the screws.
Figure 11 Figure 12
Figure 13 Figure 14
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4.2.3. Setting the Footrest for Short Lower Leg Length
Loosen the screws on the outside of the footrest (Fig. 15) and the preset (Fig. 16). Move
the footrest to the desired position and first tighten the screws of the preset. Then, rotate
the footplate until it has the desired angle and retighten the screws on the outside of the
footrest.
4.2.4.Replacement/RetrotoftheLateralHeelBlocksontheFootplate
If already present, loosen the screws on the lateral brim of the footplate (Fig. 17). Remove
the lateral heel block and replace it with a new one or, attach the new lateral heel block
beneath the footplate. Fix it at the desired angle using the existing/supplied screws.
Figure 15 Figure 16
Figure 17
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4.3. - Seat
4.3.1. Replacing the Seat Upholstery / Bars for Upholstery
Fix the Blizzard in the assembly stand. Remove the rear wheels and, if present, the seat
cushion and fold the backrest down onto the seat surface. In case of the tension adjustable
upholstery, loosen the hook and loop connections to release the tension (Fig. 18). Using
pliers, evenly pull the seat upholstery together with the upholstery bars to the rear out of
the guides (Fig. 19).
You may either reuse the upholstery bars or use new ones. If required, slide the upholstery
bars into the flaps of the new seat upholstery. Then slide into the guides in the seat tube
and evenly pull the upholstery up to the front. Close the hook and loop connections of the
tension adjustable upholstery and fold the backrest back into upright position.
4.3.2. Replacing the Stabilizer
Remove the rear wheels. Loosen the two screws of the eccentric wheels until they do no
longer hold the stabilizer, which is located under the seat bottom (Fig. 20). Replace the
stabilizer with a new one.
For assembly, please proceed in reverse order.
Figure 18 Figure 19
Figure 20
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4.4.-Back/PushHandles
4.4.1. Replacing the Rear Support Brackets
Remove the seat cushion and fold the backrest of the Blizzard down onto the seat surface.
Remove the retaining elements on the inside of the rear seat tube using a screwdriver
(Fig. 21) and push the retaining bolts out of the tube. Now pull the support brackets to the
rear out the seat tubes (Fig. 22).
Remove the spring mechanism from the support brackets and insert it into new support
brackets.
For assembly, please proceed in reverse order.
4.4.2. Replacing the Spring for the Back Release
First proceed as described in section 4.4.1. until you have the rear support brackets in your
hands. Loosen the key ring from the bolt and remove the spring from the support bracket
(Fig. 23). Insert a new spring and attach it using the key ring (Fig. 24). The reinsert the sup-
port brackets, slide the retaining bolt into the seat tube and fix the component group using
the retaining element.
Figure 21 Figure 22
Figure 23 Figure 24
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4.4.3. Replacing the Back Release
Using pincers, pinch off the release cable from both key rings (Fig. 25). Slightly bend open
the key rings and turn them out of the bolt end (key ring principle / Fig. 26). Turn new key
rings into the new release cable, which will be delivered pre-assembled, and then turn the
key rings into the bolt ends. Test the back release for proper function.
4.4.4. Pre-setting of the Back Angle
First remove the rear wheels. On both sides, open the screws of the side panel guide
(Fig. 27) and remove them. Slide the side panel downwards out of the way. The back angle
preset is now freely accessible.
On both side, remove the screws for the pre-setting (Fig. 28) and move the back into the de-
sired position. Once you have found the desired position, tighten the screws. Reassemble
the side panel guide and reattach the rear wheels.
Readjustment of the back part on the rear support brackets is not necessary.
Figure 25 Figure 26
Figure 27 Figure 28
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4.4.5.ReplacingthePushHandles
First pull off the bib of the back upholstery. Then remove the upper strap of the upholstery
(in case of folding push handles). Loosen the screw connection of the push handles on the
rear side of the back tubes (Fig. 29) and pull the push handles upwards out of the back
tubes.
For assembly, please proceed in reverse order.
4.4.6. Replacing the Back Upholstery
First proceed as described in section 4.4.5. until you have removed the push handles.
Loosen all hook and loop straps of the worn back upholstery. Then pull all strap loops
which are above the back stabilizer upwards off the back tubes (Fig. 30).
Unlock the backrest and move it into a 45° angle (Fig. 31). Remove the key rings from the
back release as described in section 4.4.3. Now pull the strap loops which are below the
back stabilizer downwards off the tubes.
For assembly, please proceed in reverse order.
Figure 29
Figure 30 Figure 31
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4.5. - Side Panels
4.5.1. Setting the Side Panels (Standard and Clothing Protector)
On both side, open the screws on the eccentric wheels (Fig. 32) until you notice that the
wheels can rotate freely and the side panel slide on the seat tube. Move the side panel
lengthwise into the desired position. Use a folding ruler to measure the distance up to the
front end of the seat tube to ensure parallel setting (Fig. 33).
Next, remove on both sides the screws of the side panel guides (Fig. 27), move the attach-
ments vertically on the back tube to the desired height, and retighten the screws.
Once you have achieved the desired position you can still make fine corrections using the
eccentric wheels before also tightening these screws.
4.5.2. Replacing the Eccentric Wheels (Standard Side Panel and Clothing Protector)
Remove the screws on the eccentric wheel (Fig. 32) and completely remove them. (This will
also make the stabilizer beneath the seat come loose, see section 4.3.2.)
Then completely loosen the small screws on the inside of the side panel (Fig. 34). You can
now remove the eccentric wheel.
For assembly, please proceed in reverse order.
Figure 32 Figure 33
Figure 34
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