1. Introduction
This manual provides essential information for the safe and effective use, setup, operation, and maintenance of your Ottobock B400 Motorized Wheelchair. Please read this manual thoroughly before operating the wheelchair and retain it for future reference. Proper understanding and adherence to these instructions will ensure optimal performance and user safety.
The Ottobock B400 is designed for individuals requiring mobility assistance, offering excellent maneuverability in various environments, from narrow indoor spaces to outdoor terrains. Its robust construction and advanced technology provide reliability and comfort.
2. Safety Information
Your safety is paramount. Always observe the following general safety guidelines:
- Read the Manual: Familiarize yourself with all instructions before operating the wheelchair.
- Pre-Operation Checks: Before each use, check the battery charge, tire pressure, and ensure all components are securely fastened.
- Weight Capacity: Do not exceed the maximum weight capacity specified in the 'Specifications' section.
- Environmental Awareness: Be aware of your surroundings. Avoid uneven terrain, steep inclines beyond specified limits, and slippery surfaces.
- Obstacles: Exercise caution when encountering obstacles. The B400 can overcome obstacles up to 50mm, but higher obstacles or sudden impacts should be avoided.
- Ramps and Inclines: The wheelchair can traverse ramps up to 12 degrees of inclination. Always approach ramps straight on and maintain a steady speed.
- Transfers: Always turn off the power and engage the brakes before transferring in or out of the wheelchair.
- Children and Pets: Keep children and pets away from the wheelchair during operation and charging.
- Maintenance: Perform regular maintenance as described in this manual to ensure safe operation.
3. Product Overview
The Ottobock B400 Motorized Wheelchair is engineered for versatility and user comfort. Key features include:
- Compact Design: Designed to easily navigate narrow doorways (as narrow as 60cm) and approach tables with ease.
- Exceptional Maneuverability: Features an 80cm turning radius, allowing for precise control in confined spaces.
- Robust Construction: Built for durability and capable of extended outdoor use.
- Extended Range: Offers an autonomy of up to 35 km on a single charge.
- Obstacle Clearance: Capable of overcoming obstacles up to 50mm in height.
- Incline Capability: Can ascend ramps with an inclination of up to 12 degrees.
- Adjustable Components: Seat width, seat depth, armrest height, and leg rest length are all adjustable to fit individual user needs. The backrest is reclinable with four angle positions.

Figure 3.1: Front-side view of the Ottobock B400 Motorized Wheelchair. This image shows the overall design, including the joystick controller, seat, backrest, and wheels.

Figure 3.2: Rear view of the Ottobock B400 Motorized Wheelchair, highlighting the adjustable backrest mechanism. The inset shows a closer view of the backrest adjustment straps.

Figure 3.3: Side view of the Ottobock B400 Motorized Wheelchair, illustrating its compact profile and wheel configuration. This view emphasizes the robust frame and suspension.

Figure 3.4: A user operating the Ottobock B400 Motorized Wheelchair on an outdoor path, demonstrating its capability for external environments.
4. Setup
Follow these steps for initial setup of your Ottobock B400 Motorized Wheelchair:
- Unboxing: Carefully remove the wheelchair and all components from the packaging. Retain packaging for potential future transport or returns.
- Initial Inspection: Inspect the wheelchair for any signs of damage that may have occurred during shipping. Contact your supplier immediately if any damage is found.
- Battery Charging: Connect the charger to the charging port on the wheelchair and then to a standard electrical outlet. Allow the battery to fully charge before first use. Refer to the charger's indicator lights for charging status.
- Adjustments:
- Seat Width and Depth: Adjust the seat width (34 to 50cm) and depth (34 to 50cm) to ensure a comfortable and secure fit. Consult the specific adjustment mechanisms in your wheelchair's detailed manual.
- Armrest Height: Adjust armrest height (22.5 to 35cm) for proper arm support.
- Leg Rest Length: Adjust leg rest length (25 to 44cm) to ensure proper leg positioning and foot support.
- Backrest Recline: The backrest can be set to 0°, 10°, 20°, or 30° angles. Adjust to your preferred comfort and support level.
- Controller Position: Position the joystick controller for easy and comfortable access.
5. Operating Instructions
Operating the Ottobock B400 is intuitive, but proper technique ensures safety and efficiency.
5.1. Powering On/Off
- To Power On: Press the power button on the joystick controller. The battery indicator lights will illuminate.
- To Power Off: Press and hold the power button until the lights turn off. Always power off the wheelchair when not in use or when transferring.
5.2. Driving
- Joystick Control: Gently push the joystick in the desired direction of travel. The further you push, the faster the wheelchair will move.
- Speed Adjustment: Use the speed control buttons (usually '+' and '-') on the controller to adjust the maximum speed. Start with a low speed setting until you are comfortable.
- Braking: Release the joystick to stop. The electromagnetic brakes will automatically engage, bringing the wheelchair to a smooth stop.
- Maneuvering: Practice in an open, safe area to become familiar with the wheelchair's turning radius and responsiveness. Remember its 80cm turning radius for tight spaces.
- Outdoor Use: When driving outdoors, be mindful of uneven surfaces, small obstacles (up to 50mm), and inclines (up to 12 degrees). Avoid sudden movements on slopes.
5.3. Adjusting Components During Use
- Backrest Recline: If equipped with power recline, use the dedicated buttons on the controller. For manual recline, disengage the locking mechanism and adjust the angle, then re-engage the lock.
- Leg Rests: Adjust as needed for comfort, ensuring feet are properly supported.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your Ottobock B400.
- Battery Care:
- Charge the battery fully after each day of use, even if only used for a short period.
- Do not allow the battery to fully discharge.
- If storing the wheelchair for an extended period, ensure the battery is fully charged and recharge it monthly.
- Use only the charger supplied by Ottobock.
- Cleaning:
- Wipe down surfaces with a damp cloth and mild soap. Avoid harsh chemicals or abrasive cleaners.
- Do not spray water directly onto electrical components.
- Tires:
- Regularly check tire pressure (if pneumatic) and inflate to the recommended PSI.
- Inspect tires for wear, cuts, or punctures. Replace worn tires promptly.
- General Inspection:
- Periodically check all nuts, bolts, and fasteners for tightness.
- Ensure all electrical connections are secure and free from corrosion.
- Inspect the joystick and controller for proper function and any damage.
- Professional Servicing: It is recommended to have your wheelchair professionally serviced at least once a year by an authorized Ottobock technician.
7. Troubleshooting
This section addresses common issues you might encounter with your B400 wheelchair. For problems not listed here, contact your authorized service provider.
| Problem | Possible Cause | Solution |
|---|---|---|
| Wheelchair does not power on. | Battery discharged; Power button not pressed correctly; Loose battery connection. | Charge battery fully; Press power button firmly; Check battery connections. |
| Wheelchair moves slowly or intermittently. | Low battery charge; Speed setting too low; Motor or controller issue. | Charge battery; Increase speed setting; Contact service provider if problem persists. |
| Brakes do not engage properly. | Joystick not fully released; Brake mechanism fault. | Ensure joystick is centered; Contact service provider immediately. |
| Unusual noises during operation. | Loose components; Motor or gearbox issue; Obstruction. | Inspect for loose parts or obstructions; Contact service provider. |
8. Specifications
Detailed technical specifications for the Ottobock B400 Motorized Wheelchair:
| Feature | Measurement |
|---|---|
| Brand | Ottobock |
| Model Name | B400 |
| Material | Aluminum |
| Seat Width (Adjustable) | 34 to 50 cm |
| Seat Depth (Adjustable) | 34 to 50 cm |
| Seat Height | 45 cm |
| Armrest Height (Adjustable) | 22.5 to 35 cm |
| Armrest Length | 26 cm |
| Leg Rest Length (Adjustable) | 25 to 44 cm |
| Backrest Height | 55 cm |
| Backrest Recline Angles | 0°, 10°, 20°, 30° |
| Total Width of Wheelchair | 58 cm |
| Total Height of Wheelchair | 1.03 m |
| Total Length of Wheelchair | 1.08 m |
| Weight (with battery) | 98 kg |
| Turning Radius | 80 cm |
| Obstacle Climbing Capability | Up to 50 mm |
| Ramp Inclination Capability | Up to 12 degrees |
| Battery Autonomy | Up to 35 km |
9. Warranty and Support
For detailed warranty information, please refer to the official warranty document provided with your Ottobock B400 Motorized Wheelchair at the time of purchase. Warranty terms and conditions may vary by region and distributor.
For technical support, spare parts, or service inquiries, please contact your authorized Ottobock dealer or the Ottobock customer service department. Ensure you have your model number (B400) and purchase date available when contacting support.
Contact Information: Please refer to the contact details provided in your purchase documentation or visit the official Ottobock website for regional support information.





