Levo Summit EL User manual

Service Manual
LEVO Summit EL
Please read these Instructions carefully before servicing a customer wheelchair.
Failure to follow these instructions could result in injury to the customer and/or
damage to the wheelchair.
If you have questions or difficulties, please contact LEVO AG.
LEVO AG ANGLIKERSTRASSE 20 TEL [phone] [e-mail]
SWITZERLAND CH-5610 WOHLEN FAX [phone] WWW.LEVO.CH

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Content
1. Introduction ...................................................................................................................................... 1
1.1. Accident prevention & Safety ................................................................................................ 1
1.2. Adjustments – General Adviced............................................................................................. 1
1.3. Repairs – General Advice ........................................................................................................ 2
1.4. Tools & Torque values ............................................................................................................ 3
1.5. Important Notes ....................................................................................................................... 3
2. Safety Checks.................................................................................................................................... 5
3. Adjustments ...................................................................................................................................... 6
3.1. Seat angle / Wheel axle adjustment..................................................................................... 6
3.2. Rear wheel adjustment / Centre of Gravity......................................................................... 9
3.3. Seat height / Front wheel diameter.................................................................................... 10
3.4. Legrest support plug adjustment........................................................................................ 11
3.5. Seat depth adjustment .......................................................................................................... 11
3.6. Backrest angle adjustment.................................................................................................... 12
4. Replacement and Repair .............................................................................................................. 14
4.1. Rear wheel tire/inner tube replacement ............................................................................ 14
4.2. Tire inner tube repair............................................................................................................. 14
4.3. Gas Spring replacement ........................................................................................................ 15
4.4. Actuator replacement............................................................................................................. 16
4.5. Control Switch replacement ................................................................................................. 16
4.6. Control box replacement ...................................................................................................... 17
4.7. Battery replacement ............................................................................................................... 18
4.8. Legrest tube replacement ..................................................................................................... 18
5. Final Check...................................................................................................................................... 19

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6. Cleaning and Disinfection.............................................................................................................20
7. Version Management.....................................................................................................................21

1
1. Introduction
Aside from the regular charging of the battery and normal cleaning, the LEVO Summit is
generally maintenance-free. To insure the safety and proper function of the wheelchair, it
should be checked at least once a year by trained service personnel.
This service manual is to be used as a reference as the authorized LEVO dealer to carry out
safety checks, service and repair on the LEVO Summit EL.
It is best to refer to both this service manual as well as the user manual.
1.1. Accident prevention & Safety
To help prevent accidents, please follow the instructions in both this and the user manual.
Be aware there are possible dangers as tests and modifications are carried out. Take suitable
preventive measures to insure the safety of yourself and others.
1.2. Adjustments – General Advice
Upon initial delivery, the safety check and adjustments should be made by the authorized
LEVO dealer. Some of the more simple adjustments might possibly be made by the user
depending on the capability of the user, family and friends. However, the following must be
done only by the LEVO dealer. This manual will instruct you on how to proceed.

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1.3. Repairs and fitting – General Advice
Service, fitting and repair works on the LEVO Summit should only be carried out by a
LEVO dealer.
•Repairs: For advice on all repairs, please contact your importer or LEVO directly (contact
information located on the front page of the User and Service Manuals).
•Major repairs: For all major repairs (e.g. bent or damaged frame) always replace
complete components. Never try to repair damaged components.
•Replacement parts: Factory replacement components should be used in all repairs; these
are available through your importer or LEVO directly. Parts list drawings can be viewed
at www.levo.ch.
CAUTION:
•Never attempt repair or maintenance work on any components of the standing
mechanism in the seated position. Always stand the chair up! Not doing so presents
a risk of accident!
•Always follow the instructions detailed in important sections of this service manual!

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1.4. Tools & Torque values
Following metric tools and torques are required to carry out maintenance work:
Screw size Screw Type Allen
wrench
Max. Torque
M4 Cylinder head screw 3 mm 2.5 Nm
Socket Set Screw 2 mm
M5 Cylinder head screw 4 mm 5 Nm
Oval-head screw 3 mm
Socket Set Screw 2.5 mm
M6 Socket Head screw 5 mm 9 Nm
Oval-head screw 4 mm
Socket Set Screw 3 mm
M8 Socket Head screw 6 mm 21 Nm
Table 1: Torque
•Allen Wrench - Do not use imperial (US standard) Allen wrenches as they may damage
screws
•Torque wrench 0 to 25 Nm
•Different standard tools.
Please note that the chair is delivered with a metric tool set.
1.5. Important Notes
•Lock-nuts which are removed should be replaced with new lock-nuts.
•It is preferred that thread locker (like blue LocTite) is utilized on screws/nuts.
•For replacement parts, use recommended components and spare parts supplied from
LEVO.

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•Always replace main components like frames, seat rails, armrests, backrests and legrest
parts. They are never to be modified or repaired.
•Be sure to follow the safety advice for any repairs on gas springs, actuators and
electronic parts.

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2. Safety Checks
At least once a year, the following safety checks should be carried out by the authorized
dealer. If any defect occurs, the user should immediately stop using the wheelchair until it is
repaired, checked and all safety rules assured.
1. Fold down the backrest and return to the upright position. Confirm that the locking
pins are seated and have correctly reset.
2. Inspect the frame and seating tubes for bends, cracks or breaks. Replace defective parts
if in need of repair.
3. Check the seat and backrest upholstery for excessive wear. Replace if necessary.
4. Check the condition of straps, belts and catches and replace, if necessary.
5. Check that all nuts, screws, joints and plastic parts are secured and in proper operating
condition.
6. Check that push handles are properly secured and the covers fit tightly.
7. Check brakes for proper holding efficiency.
8. Check that front casters and rear wheels rotate smoothly and that the axles are secure
with no wobble. Check the tires for proper pressure and the thread for excessive wear.
9. Check all electrical cables for breaks or abrasions.
10. Check all electrical connections for signs of corrosion.
11. Check that the battery and battery connections are clean. Check the battery capacity
and remind the customer to charge them every day. Especially if the batteries are old
and in declining condition. If necessary, replace the battery before returning the
wheelchair to the customer.
12. Check the standing mechanism and confirm it is operating safely.

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3. Adjustments
3.1. Seat angle / Wheel axle adjustment
The seat angle can be varied by adjusting the wheel axle vertically on the frame. Table 2:
Axle adapter position below shows the different front seat heights, the mount position (“P”)
and the corresponding seat angle. In standard configuration the seat angle is -4° backward.
By adjusting the height of the axle adapter it is possible to set the seat angle between -3°
and -8° to the rear.
These seat angles are obtainable without replacing any parts. However, depending on the
wheel size and the chosen seat height, it is possible that the wheel mount needs to be
flipped upside down (P5-P8). P1 & P5 are the most upper positions in respective
orientation, while P4 & P8 are the lowest positions.
P5
–
P1
–

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Seat angle (at max wheelbase and at min wheelbase)
Wheel size
22” 3.2°–
4.2°
4.3°–
5.7°
5.5°–
7.3°
– – – – –
24” – – 2.6°–
3.4°
3.8°–
5°
4.9°–
6.5°
6.1°–
8°
– –
26” – – – – – 3.2°–
4.2°
4.3°–
5.7°
5.5°–
7.3°
Seat height
SH48 P5 P4 P3 P2 P1
SH50 P7 P6 P5 P4 P3 P2 P1
SH52 P8 P7 P6 P5 P4 P3 P2
SH54 P8 P7 P6 P5 P4
Table 2: Axle adapter position

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CAUTION:
•It is not recommended to have a seat angle less
than 3° due to and increased risk of tipping
forward in standing position.
•It is possible to increase the seat angle greater
than 6.5°, but not in every configuration. This is
accomplished by replacing the legrest with a
different length, or longer support plugs.
•To adjust the wheel axle, begin by removing the
rear wheels/quick release axles.
•Remove the socket head attaching screws and
slide the axle mount out of the mounting
bracket.
•Move the axle mount to the desired location
making certain they are at the exact same
positon on both sides of the frame.
•Replace and tighten the socket head attaching
screws according to Table 1: Torque.
CAUTION:
•To insure stability in the standing position, the leg-rest support plugs must be
adjusted appropriately. These adjustments should only be performed by a LEVO
dealer.

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3.2. Rear wheel adjustment / Centre of Gravity
The standard position of the rear wheel on the LEVO Summit depends on the seat depth
and your chosen wheelbase.
By adjusting the rear wheel axle tube, either further forwards or further backwards, you are
able to increase or decrease the loading of the front caster.
Moving the axle tube forward moves the centre of gravity back, and makes the front end
lighter (more likely to tip backwards). Moving the axle tube back moves the centre of gravity
forward, and makes the front end more stable (less likely to tip backwards).
To avoid any potential of accident where the user tips over backwards, we recommend
installing anti-tippers.
•Loosen the three socket head screws to move the
height adapter forward or backward. Make sure
that the actuator does not touch the rear axle
after re-setting the mounting bracket.
•Make sure that all three socket head screws are
tighten according to Table 1: Torque.
•Make sure that the seating tubes always fit in the
damper consistent above the mounting bracket.
CAUTION:
•To ensure safety in the standing position, the leg-rest support plugs must be
adjusted appropriately. These adjustments should only be performed by a LEVO
dealer.

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3.3. Seat height / Front wheel diameter
The seat height is given by the front fork and the diameter of the front wheel. There are
suitable front wheel forks for each seat height available. To ensure the right standing
position, it is crucial to use the wheel position as follows:
•6”: Top hole
•5”: Middle hole
•4”: Bottom hole
•To change the seat height, the front fork has to
be replaced by a LEVO dealer.

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3.4. Leg-rest support plug adjustment
In the fully standing position, the leg-rest support plugs must be in contact with the
ground.
•Stand the chair up to the fully standing position.
•Remove the retaining screw from the legrest tube
and support plug. Adjust the support plug
into/out of the tube to the proper setting (note
that it may be necessary to rotate the plug 90°)
and replace the retaining screw.
3.5. Seat depth adjustment
The seat depth is adjustable to be set properly fit to the client’s upper leg length. This is
important for a straight, comfortable and correct standing position.
•Raise the chair up to a comfortable working
position.
•Remove the seat upholstery.
•Remove the four screws using a 4 mm hex key
inside the adjusting levers as well as the four
screws at the inside of the seat supports.
•Adjust the seat to the required depth by
telescoping the upper and lower seat rails in or
out. Make sure to adjust both sides equally.
•After adjustment, replace and retighten all eight
screws according to the Torque Table above.

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CAUTION:
An incorrect seat depth can cause pain, pressure sores and/or poor posture and
positioning. The seat depth adjustment should be done only by an authorised LEVO
dealer!
3.6. Backrest angle adjustment
The following steps must be made simultaneously and on both sides of the wheelchair.
CAUTION:Return the seat to the down position so the seating tubes are resting on the main
frame bumpers. It must not pull too hard into the bumpers to prevent damage (marked
purple).
1. Raise the seating system just slightly by pushing the control switch up. This will allow
adjustment of the back assembly.
2. Loosen the backrest angle set screw on both sides (marked red).
3. Choose the desired backrest angle by turning the eccentric screw (inside of the nut
marked blue). DO NOT TURN the nut, just the eccentric screw inside the nut! This must
be done on both sides. On the backrest joint, there is regimentation showing the angle
of the back. Make sure to set up the backrest identical on both sides. Then, tighten the
screws (marked red).
4. Turn the set screws (marked orange) several times counter-clockwise to increase the
distance between the seating tubes and the bumpers (marked purple).
ADVICE: This step is not necessary if the back rest angle was increased.
5. Lower the chair into seating by pressing the toggle switch down until the actuator stops
automatically. It needs to stop before the seating tubes touch the bumper.
CAUTION:Stop immediately by releasing the toggle switch, if the seating tube touches
the bumper (marked purple) and repeat Point 4).
6. Bring down the seating tubes by turning the setscrews (marked orange) clockwise until
both seating tubes have a distance to the bumpers from 5 to 10mm.

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7. Check if both seating tubes have the same distance to the bumpers by repeated lifting
and lowering of the mechanism.

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4. Replacement and Repair
4.1. Rear wheel tire/inner tube replacement
•Remove the wheel from the wheelchair and press the centrepiece in the valve to let out
the air.
•Using a tire wedge, ease both sides of the tire over the wheel rim and pull the inner
tube out of the tire.
•Replace the inner tube by forcing one side of the tire back over the wheel rim. Add a
small amount of air back into the tire. Ease the valve through the valve port in the wheel
rim. Snug the tube on the rim and in the tire with valve positioned straight through the
valve port and pointing at the wheel center. Starting opposite the valve, force the other
side of the tire back over the wheel rim being careful to not pinch the new tube.
•Make certain the inner tube is not caught between tire and rim before inflating to the
manufacturer’s recommended tire pressure.
4.2. Tire inner tube repair
•Remove inner tube and tire following the steps described above.

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•Repair the hole using a puncture repair kit and follow the manufacturer’s instructions like
cleaning the area around the hole and roughen the tube surface before applying the
vulcanized solution.
•Allow to dry, and then firmly attach the rubber patch. Again, first allow to dry, and then
pump up the tube to check that the patch is airtight.
•Replace the inner tube. Once the whole tube is snug inside the tire, force the tire back
over the wheel rim (starting on the side opposite the valve).
•Check least the inner tube is caught between tire and rim before pumping it up in line
with the manufacturer’s recommended tire pressure.
4.3. Gas Spring replacement
There are different gas spring strengths, which are matched to the body weight of the user.
CAUTION:
The gas springs are pressurized and are potentially dangerous. Always extend the
actuator raising the chair into the fully standing position before disassembling. Never
disassemble gas springs in seating position. The gas springs are compressed and under
load and will extend rapidly if released causing possible harm to the technician.
•Raise the LEVO Summit to the standing position.
•Release all attaching clips.
•Remove the existing gas springs and replace with
the new. Replace the attaching clips.
•Be sure that the spacers are between the clevis
joints and the mounting plate

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4.4. Actuator replacement
CAUTION:
The gas springs are pressurized and are potentially dangerous. Always extend the
actuator raising the chair into the fully standing position before disassembling. Never
disassemble gas springs in seating position. The gas springs are compressed and under
load and will extend rapidly if released causing possible harm to the technician.
•Raise the LEVO Summit to the standing position.
•Remove the clip from the bolts at the front and
rear connectors of the actuator.
(It may be necessary to pull the seat down
slightly and release the gas springs to decrease
the load on the bolts.)
•Retract the disconnected actuator slowly until it
can be removed completely.
•Disconnect the actuator plug and the control
cable from the control box and remove the box
from the old actuator to mount it on the new
one.
•Mount the rear end of the new actuator first.
Drive the seat down untill the shaft of the
actuator aligns with the mounting plate.
Assemble in reverse order.
4.5. Control Switch replacement
•Unplug the control cable at the control box
•Loosen the screw inside the front end of the
armrest underneath the padding.
•Slightly pull out the control switch toward the
front.