Tendercare Snappi Instruction manual

Snappi Wheelbase & Interface Workshop Manual
Document No: 053-02 v2c Page 1 of 25 March 2012
Snappi Wheelbase Interface Workshop Manual.doc
Snappi
®
W HEELBASE A ND I NTERFACE
W ORKSHOP M ANUAL
IMPORTANT
Please read these instructions carefully
Before attempting to maintain the Wheelbase or Interface

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Fig 0.1 Wheelbase (size 1 shown)

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Fig 0.2 Wheelbase Folded (size 1 shown)
Fig 0.3 Seat Interface (size 1 shown)

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Fig 0.4 Frame With Interface Fitted (size 1 shown)

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CONTENTS
Item
Description
Page
1 Your Snappi Wheelbase and Interface Workshop Manual 6-7
2 Transit Packaging 8
3 Tools & Torque Settings 9
4 Preparing for use and operation 9
4.1 Unfolding the frame 9
4.2 Brakes 9
4.3 Tilt In Space 10
4.4 Working with the interface 10
5 Fitting Special Seat 10-11
6 Final Checks 12
7 Maintenance 12
7.1 Routine maintenance 12
7.2 Six monthly maintenance 12-13
8 Repairs 13
8.1 Rear wheels 14
8.2 Castor assembly 14-15
8.3 Brake assembly 15-16
8.4 Gas strut 17
8.4.1 18-19
8.4.2 20-21
8.4.3 22
8.5 The Interface 23-24
8.6 24-25
9 Cleaning 25
10 Parts Lists 25

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1: Your Snappi Wheelbase / Interface Workshop Manual
The purpose of this manual is to help you get the best from your wheelbase &
interface. It does this by telling you how to complete those maintenance and
repair tasks that can be carried out by a competent person. The manual also
tells you when you should contact the manufacturer who is:
Tendercare Ltd.
PO BOX 3091, Littlehampton, BN16 2WF
Tel: [phone] Fax: [phone]
Email: [email protected]
Web: www.tendercareltd.com
IMPORTANT:
This manual must be read and used in conjunction with the user manual.
The Wheelbase is made of a strong and lightweight aluminium alloy,
minimising weight and providing a very rugged frame. The wheelbase
provides a tilt in space facility and has 2 fixed rear wheels and 2 castor
wheels at the front for easy steering. The wheelbase comes in two sizes with
corresponding interfaces to suit a range of different seats.
The Interface provides a very lightweight, easy to operate, quick release
system that can be fitted to a wide range of special seating system. Please
note the interface requires additional framework to fit to a seat, and has been
designed to take 19mm (3/4”) aluminium or mild steel tube.
The interface can be quickly fitted and released from the wheelbase, which
can be folded for transport. The Snappi has been successfully impact tested
as a wheelbase and interface, with the Modular and Snug seating systems.
When fitting 3
rd
party seating systems to the Snappi, the manufacturer of the
system must carry out a risk assessment before use.
These instructions apply to all sizes.
Interfacing Options:
Seat / Interface
Version Maximum Weight (Kg) Maximum Seat Width (mm)
Size 1 50 350
Size 2 50 415
IMPORTANT:
 Maximum width; maximum space available for seating systems being fitted into
frame.
 Maximum weight includes the seat unit, occupant and all accessories.
Frame Weight:
Size 1: 10kg
Size 2: 11kg

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Dimensions (mm)
Snappi Wheelbase Open
Size 1 Size 2
A 944 960
B 571 684
C 992 998
Dimensions (mm)
Snappi Wheelbase Folded
Size 1 Size 2
D 771 798
E 571 684
F 573 560
All sizes and weights are given as a guide. Tendercare ltd reserves the right
to amend specifications at any time as part of their product development
programme.

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2: Transit Packaging
The wheelbase and interface are delivered together in a cardboard carton.
This measures 680mm wide x 480mm deep x 1030mm high and weighs
approximately 15Kg.
WARNING:
The transit carton is quite bulky so moving and unpacking must be done
with care. Observe all lifting and handling regulations.
Stand the carton upright making sure it is supported and cannot fall over.
Open the carton and remove any packages or packing materials, which could
obstruct the removal of the wheelbase. Remove the wheelbase.
The carton should contain the following items:
Item
Component QTY. Yes No
1 Size 1 or 2 Wheelbase (if ordered) 1
2 Size 1 or 2 Interface (if ordered) 1
3 User Manual 1
IMPORTANT:
 The interface will be supplied fitted to the frame. These can easily be separated
by releasing the interface catch once the frame has been removed from its
packaging. Please refer to section 4.4 of the user manual for more information
on working with the interface.
 If any items are damaged or missing, then please contact Tendercare,
preferably by email at [e-mail] or alternatively please call us on
[phone] within 36 hours of delivery.
After unpacking and checking that you have all the components and that they
are in good condition dispose of the packaging at your local recycling centre.
Alternatively retain and reuse.

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3: Tools and Torque Settings
The following tools are required to dismantle, reassemble and repair the
Wheelbase / Interface:
Spanners and sockets: 10mm, 13mm and 19mm
Hexagon Keys: 4mm, 5mm and 6mm
Torque Wrench: Range 0 to 50 Nm
Screwdrivers: 2 small flat blade screwdrivers
Torque Settings
Spanner Size (mm)
Torque (Nm)
10 15
13 25
19 50
4: Preparing for use and operation
WARNING:
When opening or folding the wheelbase, ensure that you hold the frame
so that you avoid any danger of catching your fingers in moving parts.
The following pre-delivery procedures should be carried out to check that the
wheelbase and interface has not suffered damage during transit and that all
features operate satisfactorily. Refer to the user manual for detailed
instructions on performing each action.
4.1 Unfolding the Frame
Unfold and assemble the frame: Follow the instructions in section 4.1 of the
user manual
Checks:
•Make sure all joints move freely
•Make sure the frame locks latch correctly
•Check that the push handle adjustors work
•Ensure that all fixings are secure and that the frame has not been bent
or otherwise damaged during transit.
4.2 Brakes
Test the brakes: Follow the instructions in section 4.2 of the user manual
Checks:
•Make sure the brakes work correctly
•Check that the fixing bolts are secure
WARNING:
The break mechanism is spring loaded so care must be taken when
operating it.

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4.3 Tilt In Space
Test the tilt in space mechanism: Follow the instructions on section 4.3 of the
user manual.
Checks:
•Make sure that the cable mechanism works correctly and that the cable
is not trapped in any way.
•Check that the centre section tilts correctly and locks throughout its
adjustment range.
•Check that the 4 bolts that mount the centre section into the frame are
secure.
IMPORTANT:
 Always support the seat when tilting, as the gas springs can be quick to
operate. If the seat is not supported, it may move swiftly and could cause the
occupant distress.
4.4 The Interface
Test the operation of the interface: Follow the instructions on section 4.4 of
the user manual to attach and remove the interface.
Checks:
1. Make sure that the interface frame has not been bent or damaged
during transit
2. Check that the spring clips move freely and snap back to their closed
position when the lever is released
3. Make sure the interface latches down and locks securely to the frame
4. Check that the secondary latch mechanism functions correctly
5. Check that the interface releases correctly and that there is not
excessive friction on the lever when releasing it from the frame
IMPORTANT:
 The interface is spring loaded, so ensure your fingers are clear of the clips
before fitting.
5: Fitting a Special Seat
The interface is designed to bolt onto the base of a special seating system
using the 4 base fixing points.
The interface should always be fitted with a suitable framework and includes 4
tube mounting brackets that fit 19mm or ¾” aluminium or mild steel tube.
We recommend using ¾” x 10 SWG (or 19 x 3mm metric) aluminium tube in
grade 6063 T6 for the frame mounting. Alternatively 16 SWG (1.6mm) mild
steel tubing can be used.

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Due to the wide range of different special seating systems, Tendercare do not
supply fixing brackets for these items. Please refer to the special seat
manufacturers instructions.
An example set up using the interface is shown below:
Fig 5.0.1
IMPORTANT:
The Snappi has been successfully impact tested as a wheelbase and interface
with the Modular and Snug seating systems. When fitting third party seating
systems to the Snappi, the manufacturer of the system must carry out a risk
assessment before use.
When fitting a third party seat stability may be affected. A test is necessary to
confirm that the static stability is satisfactory. A stability test to meet the
requirements of EN.ISO7176 must be completed by the commissioning
wheelchair service. This test must be passed before handover of the system.

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6: Final checks
1. Check that the special seat is firmly attached to the interface and
framework.
2. Check that all harnesses are secure and adjusted properly.
3. Check that the interface is located and locked correctly in the
wheelbase.
7: Maintenance
Should a problem be found when carrying out the regular checks, it should be
immediately reported to the issuing authority or Tendercare Ltd.
7.1 Routine maintenance
The users family can easily carry out the following tasks. No tools are
required.
1. Always wipe the wheelbase and seat frame dry. Never put them away
damp.
2. Check operation of the brake, folding and reclining mechanisms
(weekly).
3. Clean frame when necessary (we suggest at least once a week).
If you find any faults refer to your issuing authority or Tendercare Ltd.
7.2 Six-monthly maintenance
Only someone who is a competent tradesman or repairer should carry out this
work. If a major fault is found stop using the wheelbase until it has been
corrected.
1. Fold and open the wheelbase. Check that all movements through the
folding range are free. Examine frame for any damage.
2. Check operation of the wheelbase tilt in space mechanism.
3. Examine nuts, bolts, pivots and frame plugs for tightness and general
condition.
4. Examine brake assembly for wear, damage and correct operation.
5. Examine tyres for sharp objects, cuts or splits.
6. Examine castor and wheel bearings for excessive wear.

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7. Check castors and rear wheels for free rotation, security and
accumulation of fluff and grit. Remove any fluff and grit with a dry lint
free cloth.
8. Check the Interface fits securely into the frame, and that it is not worn
or damaged.
9. Check the interface clips to ensure they can rotate freely and that the
springs return the clips to the closed position when released.
For all other repairs refer to your issuing authority or Tendercare Ltd.
8: Repairs
Only an authorised repairer should carry out the following repairs.
1. Repairs: For all repairs contact your issuing authority
2. Major repairs: For all major repairs e.g. bent or damaged frame, the
wheelbase / interface should be returned to the factory. Contact
Tendercare ltd, customer services on 01903 726161, or email to
[email protected]
3. Factory replacement components should be used in all repairs. These
are available from Tendercare. Please refer to the parts lists at the end
of this manual (section 10) for details of replacement parts.
Important points when performing a repair:
1. Do not reuse Nylock nuts, always replace with a new nut
2. Always use Loctite thread locking compound grade 241 or 243 on all
threads when reassembling any part of the system.
3. Always use the recommended component parts available from
Tendercare Ltd.
4. Do not attempt to correct bent framework or perform any modifications
to welded parts. If any main framework sections are bent or damaged
please return the product to the factory.

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8.1: Rear Wheels
Replace if damaged or worn. To change the rear wheel:
Fig 8.1.1
•Remove the wheel cap using
a small screwdriver (see fig
8.1.1 left)
•Note the position of the axle
spacer and washers
•Using a 19mm spanner, undo
the axle bolt and remove the
wheel from the frame (see fig
8.1.2 below)
•
To fit the new wheel: Ensure
the large nylon washer is
placed under the head of the
M12 bolt.
•Fit this through the wheel and
slide the axle spacer onto the
protruding bolt.
•Place a new M12 Nylock nut
into the axle support, and
screw the bolt into the nut
(the axle support will prevent
the nut from turning)
•Tighten to 50Nm with a
torque wrench
• Finally push fit the wheel cap
over the bolt head.
Fig 8.1.2

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8.2: Front Castors
Replace if damaged or worn. To change the front castor:
Fig 8.2.1
•Remove the wheel by
unscrewing the M8 socket cap
bolt using a 5mm hexagon key.
•Next remove the castor
housing using a 19mm
spanner
•To fit the new castor, first
ensure the wheel is removed
from its housing.
•Next fit the hosing to the frame
and tighten to 50Nm with a
torque wrench
•Screw the new wheel into the
castor housing using a 5mm
hexagon key and tighten firmly
(no other tool is required to fit
the wheel as the castor
housing includes a captured
nylock nut).
Fig 8.2.2

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8.3: Brake Assembly
Replace the brake bar if it is bent or damaged. The springs may also be
replaced if corroded or stretched.
IMPORTANT
The brake system uses two high-tension springs. Care must be taken when
working on the brake mechanism. The following instructions are the
recommended method for dismantling the brake system to safely release the
tension on the springs. If you are not confident to work on this assembly
please return your frame to the Tendercare factory.
To dismantle the brake assembly:
Fig 8.3.1
•
Put the break into the “off”
position, and remove the 2 rear
wheels as detailed in section
8.1 of this manual.
•Next flip the brake bar down to
the “on” position. As there are
no wheels the bar will move
much further and release most
of the tension on the springs
as shown in figure 8.3.1 (left).
•Undo the brake bar pivot bolt
using a 10mm spanner and
4mm hexagon key. Care must
be taken at this stage, as
there will still be some
tension on the spring.
Fig 8.3.2
Fig 8.3.3
•
Once the 2 pivot bolts are
released the bar will drop down
and rest against the frame.
•To release the springs, lift the
bottom of the brake bar up and
round past the frame bar as
shown in figure 8.3.3. Now the
tension on the spring will be
fully released and they can
easily be unhooked.
•To refit a new brake bar or
springs, follow the reverse of
this procedure.

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8.4: Mid Section and Gas Strut
Replace the gas spring if it is damaged or worn.
To remove the gas strut:
Fig 8.4.4
•Lift the frame onto a suitable
workbench and lay it on its
side
•Using a 13mm spanner and
5mm hexagon key undo the
gas strut fixing bolts. Take note
of the position of the washers
and spacers.
•To remove the Bowden cable,
use 2 small screwdrivers to
release the “screw nipple” (see
right) and then slide it along
the excess cable as shown in
fig 8.4.6 (next page).
Fig 8.4.5
Fig 8.4.6
•
Place a small screwdriver
between the gas spring and
the plastic clip on the Bowden
cable and lever the clip away
from the spring housing.
•To fit the new gas spring, clip
the cable onto the head of the
new spring, slide the screw
nipple into the lever and
tighten. Then remount in the
same way as the original
spring was fitted.
•Once fitted, test the operation
of the gas strut as detailed in
section 4.3 of this manual

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8.4.1 Change the end fittings on the gas spring cable:
To replace the end fitting on the gas spring:
To order just the end fittings, order
part SN7300B (please see the Snappi
Chassis parts list). Alternatively a
whole tilt cable assembly can be
ordered under part code SN3700.
Right: The end fittings as supplied;
A- aluminium crimp fitting B- the
plastic cable mounting
Fig 8.4.1.1
Fig 8.4.1.2
First cut the end of the steel cable
and crimp fitting off of the old cable
using a pair of wire cutters.
Next loosen the ‘screw nipple’ with a
small screwdriver and slide off the
end of the cable (please retain this
end fitting).
Fig 8.4.1.3
A
B

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Fig 8.4.1.4
Remove the old cable end fitting
using a screwdriver and slide off the
end of the cable.
Next take the new end fitting and
slide onto the end of the cable, then
push fit back onto the clip point on the
gas spring (see below).
Fig 8.4.1.5
Fig 8.4.1.6
Slide the ‘screw nipple’ back onto the
cable, into the scoop in the gas spring
head lever, making sure all the slack
is taken up in the cable, tighten with
the screwdriver. Finally grip the
aluminium end crimp in a large pair of
grips, slide over the cut end of the
cable and squash to prevent the
cable end from fraying.
Finally test the operation of the gas spring, if the gas spring will not release,
check the cable for slack and adjust the ‘screw nipple’ as required. For more
details on the correct operation of the tilt mechanism please refer to the user
manual.

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8.4.2: Replace the tilt cable, leaving the release lever in place:
Replace the tilt cable if damaged or worn. This is the preferred method
providing the release lever is OK. If the release lever needs to be replaced
follow the instructions in section 8.4.3.
First release the ‘screw nipple’ on the
old tilt cable using 2 screw drivers.
Fig 8.4.
2.1
Fig 8.4.
2.
2
Slide this down to the end of the
cable to provide some slack as shown
(see left). Note the new cable will also
need to be loosened off.
Using a small screwdriver, separate
the cable mounting from the gas
spring as shown (right).
Fig 8.4.
2.
3