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Some maintenance tasks can be carried out to a certain extent by the user at home (see the sections "Mainten
ance intervals" and "Maintenance tasks").
The manufacturer also recommends regular maintenance every 12 months by authorised, qualified personnel.
Failure to maintain the product can lead to serious or life-threatening injury to the user of the product.
Service and repairs may only be carried out by authorised, qualified personnel or the manufacturer. This will
ensure that only Ottobock spare parts are used for repairs.
7.1.1 Maintenance intervals
The functions described below must be checked by the user or an attendant at the specified intervals:
Inspection task Before each use Monthly Quarterly
Functional test of the wheel locks X
Sagging of the seat or back upholstery X
Stability of the legrests X
Visual inspection of wear parts (e.g. tyres, bear
ings)
X
Soiling of bearings X
Damage to the push ring X
Air pressure (information see tyre sidewall) X
Wear and tear of the folding device X
Check of the spoke tension on the rear wheels X
Check of all bolted connections X
7.1.2 Maintenance tasks
To ensure smooth operation at all times, users or attendants with some technical skills can maintain some parts of
the product:
Bolted connections must be periodically checked for tightness, especially during the initial period of use or
after adjustments have been made to the wheelchair. If a screw connection loosens repeatedly, contact the
specialist dealer promptly.
Hair and dirt particles generally accumulate between the caster wheel and fork. This can restrict the caster
wheels from rotating smoothly. For this purpose, lubricate the caster axle between the caster wheel and caster
fork with a few drops of thin, resin-free oil (sewing machine oil).
CAUTION: Do not remove the caster wheel yourself. If the caster wheel continues to not rotate
smoothly, please contact the qualified personnel.
The rear wheels are equipped with a quick-release axle system as standard equipment. To keep this system
operational, ensure that no dirt adheres to the quick-release axle or receiver bushing. Periodically lubricate the
quick-release axle very lightly with thin, resin-free oil (sewing machine oil).
If the wheelchair becomes wet, it should be rubbed dry again.
7.2 Repair
7.2.1 Inner tube, rim tape and tyre replacement
CAUTION
Improper tyre replacement
Injuries to the user due to incorrect installation, product damage
No person is permitted to sit in the wheelchair during tyre replacement
Before removing a wheel, support the product so it cannot tip over.
Always replace the tyres in pairs. Two differently worn tyres affect the directional stability of the wheelchair.
INFORMATION
When driving outdoors, always carry a repair kit and tyre pump (when using pneumatic tyres) in case of emer
gency.
Suitable tyre pumps are listed on the order form and are supplied with the product. An alternative is tyre foam,
which fills your tyre and then hardens (available from bicycle shops, etc.).
Repairing flat tyres requires only the necessary tools and users may change tyres themselves if they wish:
31Avantgarde 4
Maintenance and repair
31


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