Rehab motion Manual
Technical Information | English
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© 2021 HD Rehab AB
HD Motion | Technical Information
WE MANUFACTURE QUALITY OF LIFE
HD Rehab helps people achieve an improved quality of life. Our products help make
the lives of users, their families, and caregivers easier, safer, and more comfortable.
HD Rehab oers assistive products for people living with disability. Our primary product is wheelchairs,
which we have been designing, developing, and manufacturing for over 40 years. We accept no
compromises in quality. Precision, safety for user and caregiver, function, and design are our guiding
principles. We are condent that you will feel the dierence compared to any other wheelchair.
GLAD TO BE FLEXIBLE
Whether you are a user, a family member, or a caregiver we welcome your requests and opinions. Our
designers and developers work closely with the production team at our facility on the island of Lidingö
in Stockholm. Our creative employees use their specialist knowledge, experience, and inventiveness to
nd solutions for the unique needs of each individual.
This document is available in PDF format at hdrehab.com.
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HD Motion | Technical Information
CONTENTS
1 General Information 4
1.1 Important documents 4
1.2 Lubricants and thread lockers 4
1.3 Finishes 5
2. Wheelchair Construction 5
2.1 Chassis construction 6
2.2 Chassis configuration options 6
2.3 Chassis attachment points 7
2.4 Gas springs for seat tilt and back recline 8
2.5 Adjustment of seat zero position 8
2.6 Replacement of gas spring for seat tilt 9
2.7 Replacement of gas spring for back recline 10
2.8 Change to fixed back angle 11
2.9 Replacement of back frame 11
2.10 Replacement of seat frame 12
2.11 Raising seat with adapter 12
2.12 Drive wheel & Cross tube positions 13
2.13 Drive wheels 14
2.14 Tip protectors 14
2.15 Fenders 15
2.16 Castors 15
2.16.1 Replacement of castor fork 15
2.16.2 Replacement of castor 15
3. Construction of Various Components 16
3.1 Disc brake system 16
3.1.1 Adjustment of disc brakes 16
3.1.2 Replacement of brake cable 17
3.1.3 Replacement of brake pad and disc 17
3.2 User brakes 18
3.2.1 Adjustment 18
3.2.2 Replacement and repair 18
3.2.3 Replacement of brake cable 19
3.3 Cable controls 20
3.3.1 Cable routing 20
3.3.2 Replacement of control 21
3.3.3 Replacement of cable 22
3.3.4 Adjustment of cable 23
3.4 Push bar 23
3.4.1 Replacement of push bar 23
3.4.2 Replacement of angle joint 23
3.5 Backrest system 24
3.5.1 Back spacers 24
3.6 Armrests 25
3.6.1 Height adjustment mechanism 25
3.6.2 Depth adjustment mechanism 25
3.6.3 Replacement of armrest pad 25
3.6.4 Replacement of side support 26
3.7 Armrest mount 26
3.8 Leg rests 27
3.8.1 Leg rest mount 27
3.8.2 Leg rest tubes 28
3.8.3 Footrests 28
3.8.4 Foot box 29
3.8.5 Calf supports 29
4HD Motion | Technical Information
1. GENERAL INFORMATION
The product is a comfort wheelchair that comes in two versions, HD Motion 22 and HD Motion 16.
HD Motion 22 is intended for children/youth or small adults who can to some degree drive the
wheelchair independently. It can also be used if the user is unable to drive independently. HD Motion
16 is only for users who cannot drive independently.
HD Motion is intended for users in need of excellent comfort and support when seated. The seat and
back can tilt in various positions to give the user a variety of seating options for activity and rest.
Prescription by a medical professional is required before beginning to use HD Motion. This applies to
new wheelchairs as well as when a used chair changes users. All prescription and adaptation of the
wheelchair must be carried out by qualied personnel.
If the user has movement patterns or behaviour that strains the wheelchair excessively a reinforced
model may be needed. This applies for example to users with increased tonus or spasticity.
The wheelchair is approved for use as a seat during transportation in vehicles.
HD Motion is a Class 1 Medical Device, CE-marked per EU 217/745 (MDR).
1.1 Important documents
It is useful to have the following documents at hand when working with HD Motion:
95431-1 Information about custom-made products
Information regarding regulations that apply for adaptations and modications of
medical products.
96711-1 Risk Information - Special congurations and Accessories
Information about increased risks when using certain special congurations and
accessories.
96764-1 Labelling
Information about which labels are to be found on the wheelchair.
96730-1 Maintenance Schedule
Instructions for maintenance to maximise the life and performance of the wheelchair.
1.2 Lubricants and thread lockers
Table 1 details recommended lubricants and threadl ockers.
Table 1 - Recommended lubricants and thread lockers
Area of use Lubricant type Product used by HD Rehab
General lubrication of sliding surfaces etc. Synthetic food grade grease Fuchs Cassida EPS 2
Vendor: Ikaros AB
Locking of screws, permanent, e.g. wheel
axle pin
High strength thread locker Loctite 2700
Locking of screws to crossbars etc. that
may be removed for repairs
Medium strength thread locker Loctite 2400
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HD Motion | Technical Information
1.3 Finishes
The following nishes are used on HD Motion:
• Powder coat painting, frames: Grey metallic, colour code RAL 7832, gloss 85.
Orange, colour code RAL 2004, gloss 72.
Green, colour code RAL 6037, gloss 72.
• Powder coat painting, details and accessories: Black, colour code RAL 9005, gloss 40.
• Anodizing: natural and black.
• Nitrocarburizing.
• Galvanizing.
2. WHEELCHAIR CONSTRUCTION
HD Motion is built with a chassis that gives the fundamental characteristics, see section 2.1.
The chassis is complemented with dierent conguration accessories such as dierent backrest
systems, leg rest options, armrests, and push bar.
In addition, the wheelchair can be equipped with a range of dierent accessories such as headrest, tray
table, trunk support, and more.
Chassis components are named per Figure 1.
1Wheel frame 6Drive wheel 11 Controls
2Seat frame 7Castor 12 Angle joint
3Back frame 8Fender 13 Push bar
4Wheel mount 9Armrest mount 14 Gas spring, tilt
5Tip protector 10 User brake 15 Gas spring, recline
Figure 1. Chassis components
15
10
5
9
4
1311
14
8
3
12
7
2
6
1
15
10
5
9
4
13
14
8
3
12
7
2
11
6
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6HD Motion | Technical Information
2.1 Chassis construction
HD Motion has a chassis constructed of three interacting frames; wheel frame, seat frame, and back
frame. These are attached to each other at a number of points and create the desired geometry for
balance, recline, and seat tilt. The wheel frame and seat frame are connected at a point with some
adjustment possible.
Adjustment of seat tilt and back recline are done with cable controls (11 in Figure 1) which are placed
on the push bar.
The two models, 22 and 16, have identical chassis except for the wheel frame, where the brackets for
wheel attachment and anchoring are dierent.
2.2 Chassis conguration options
The HD Motion chassis can be modied to change several basic characteristics of the wheelchair.
The standard conguration is the reference point for all specied data regarding characteristics,
functionality, measurements, and testing against relevant standards. Changes to the conguration
of the wheelchair come with both positive and negative consequences. Therefore the standard
conguration should be used wherever possible.
The following modications can be made:
• Seat frame length, to achieve dierent seating depths. The type of wheelchair chosen when
ordering determines the length, it cannot be modied later.
• Seat width can be adjusted by re-positioning the armrest mounts, see section 3.7.
• The tilt position of the seating unit can be adjusted, see section 2.5.
• Fixed back angle between 90° and 105° can be set by replacing the gas spring with a rod, as
described in section 2.8.
• Seat height can be raised with an adapter, see section 2.11.
• Wheel mounting position has 3 possible settings. This determines the stability and driving
characteristics of the wheelchair. See section 2.12.
• Size of drive wheels.
Model 22: 22” is standard. 20”or 24” can be used. See sections 2.11, 2.13, and 2.14.
Model 16: 16” is standard. This cannot be changed.
• Change of camber angle. Aects stability and driving characteristics.
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HD Motion | Technical Information
2.3 Chassis attachment points
The back of the seat frame is attached to the side plates of the wheel frame with screws on both sides
(3 in Figure 2). Each connection consists of a bushing, 2 washers, a screw, and a lock nut.
The front of the seat frame is attached to the gas spring for seat tilt via pin joints (5 and 6 in Figure 2).
Each connection consists of a pin and 2 circlips. Note the pins have dierent lengths.
Generally the seat frame does not need to be replaced. If the need does arise, see section 2.10.
The back frame is attached to the seat frame with screws on both sides (2 in Figure 2). Each connection
consists of a bushing, 2 washers, a screw, and a lock nut. Note: the bushings for the back connection (2)
and the seat connection (3) are not the same.
The gas spring for back recline is attached to seat frame via a pin joint (4 in Figure 2). The connection
consists of a pin and 2 circlips. The gas spring attaches to the bottom of the back frame via a spring-
loaded pin (1 in Figure 2) that can be pulled out to release the back frame, allowing it to be folded
down to a transport position.
See sections 2.4 - 2.7 for further information regarding the gas springs.
Generally the back frame does not need to be replaced. If the need does arise, see section 2.9.
Figure 2. Chassis attachement points
5
4
3
2
6
1
3
2
5
4
6
1
8HD Motion | Technical Information
2.4 Gas springs for seat tilt and back recline
Both gas springs are equipped with release mechanisms, with the cable for control attached as seen in
Figures 3 and 4. The gas springs are activated from the cable controls on the push bar - back recline on
the left side, seat tilt on the right side.
2.5 Adjustment of seat zero position
The gas spring for seat tilt is mounted in holder (Figure 3) which allow for adjustment of the zero
position of the seat. Adjustment is done as follows:
1. Set the seat tilt all the way forward, which is to say the gas spring fully in, see Figure 3.
2. Loosen the nut (6) a few turns so that the gas spring is not held fast in the holder (15).
3. Loosen the nut (7) a few turns so that the gas spring can move in the holder.
4. Adjust the seat to the desired position. Depending on the wheels and tires, it can be adjusted
between approximately -5° and +3°.
5. Tighten the nut (7) rmly.
6. Tighten the nut (6) just enough that the gas spring cannot rattle in the holder.
7. Tilt the wheelchair to check that the desired positioning has been set.
Figure 3. Gas spring for seat tilt Figure 3.1. Pin parallel with bracket
19
14
7
18
13
6
17
11
12
16
10
9
45
15
8
1
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HD Motion | Technical Information
2.6 Replacement of gas spring for seat tilt
1. Remove cushions, leg rests, and seat plate.
2. Remove the cable from the holder as follows (see Figure 3):
Fully loosen the nut (4). Take the wire housing (5) out of the bracket (12) by pulling the end of the
housing sideways to bring the wire out. Remove the wire nipple (1) from the pin (2). Take care not
to lose the spring (3).
3. Remove the gas spring from the seat frame by removing a circlip (19) and then pulling or knocking
out the pin (11). Be careful when removing the circlip. If it is opened too far it will be damaged and
must be discarded.
NOTE: When the pin is removed the seat unit can fall forward with risk for personal injury and
damage to the wheelchair. Ensure the seat unit is properly supported. Tip: Fold the back frame
forward so that all weight is forward and easier to control.
4. Remove the holder from the wheel frame by taking out the pin (14) in the same manner.
5. Remove the gas spring from the holder as follows:
Loosen the nut (6) a few turns. Remove the nut (7) and take out the bolt (17) and spacers (8 and
16). Push the gas spring out of the holder far enough to free the end plug (19). Push the sleeve (18)
out of the end plug, which can then be removed. Pull the gas spring out of the holder.
6. Loosen the nut (13) a little so that the gas spring can be threaded out of the rod (9). Hold all of the
end pieces together so they do not fall apart. Thread the new gas spring into the rod. Check that
all pieces are in place and that the nut (13) is fully threaded on to the gas spring shaft.
7. Adjust the gas spring position in the rod (9) so that the pin (2) is parallel with the bracket (12)
when the spring is pressed (lightly) against the release pin of the gas spring. See Figure 3.1.
8. Tighten the nut (13) but not excessively.
9. Reassemble the gas spring in the holder and the holder to the wheelchair in the reverse order of
steps 2-5 above. Do not forget the spring (3).
10. Reassemble the seat plate and check function. The cable for the seat tilt may need adjustment.
Some adjustment for proper release of the gas spring can even be done by moving the gas spring
slightly in the rod.
See also section 3.3 Cable controls for more info.
11. Adjust the seat zero position per section 2.5.
10 HD Motion | Technical Information
2.7 Replacement of gas spring for back recline
1. Remove cushions and seat plate.
2. Release the gas spring from the back frame by pulling out the pin (6 in Figure 4), and then fold the
back frame forward. Be careful as the back frame is free to fall when then pin is pulled out.
3. Loosen the nut (11) slightly so that the gas spring can be threaded out of the rod (7). Hold all of
the end pieces together so they do not fall apart.
4. Thread the new gas spring into the rod. Check that all pieces are in place and that the nut (11) is
fully threaded on to the gas spring shaft.
5. Adjust the gas spring position in the rod (7) so that the pin (2) is parallel with the bracket (10)
when the spring is pressed (lightly) against the release pin of the gas spring. See Figure 4.1.
6. Tighten the nut (13) but not excessively. Turn the gas spring to the correct angle and attach it to
the back frame with the pin (6). Check that the pin snaps into place correctly.
7. Check the back recline function. The cable may need adjustment. Some adjustment for proper
release of the gas spring can even be done by moving the gas spring slightly in the rod.
See also section 3.3 Cable controls for more info.
8. Reassemble the seat plate and cushions.
Figure 4. Gas spring for back recline Figure 4.1. Pin parallel with bracket
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