1. Introduction
This instruction manual provides essential information for the proper installation, operation, and maintenance of the Braun 33337AKS Threshold Tape Switch Assembly. This component is a critical safety device designed for Braun wheelchair lifts, ensuring compliance with NHTSA 945 safety standards. It functions by detecting obstructions on the lift platform, thereby preventing unsafe operation and enhancing user safety. The 33337AKS is an OEM replacement part, built for durability and reliable performance in various mobility applications.
2. Safety Information
Important Safety Notice: Always prioritize safety when working with electrical components and mobility equipment. Failure to follow these instructions could result in injury or damage to equipment.
- Ensure the wheelchair lift's power is disconnected before attempting any installation, maintenance, or inspection of the tape switch assembly.
- This product is designed to meet NHTSA 945 safety standards. Regular inspection and proper installation are crucial for maintaining compliance and operational safety.
- Only use genuine BraunAbility replacement parts to ensure compatibility and maintain safety certifications.
- If you are not confident in performing the installation or maintenance, seek assistance from a qualified technician.
- Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
3. Product Overview
3.1. What's in the Box
- 1 x Braun 33337AKS Threshold Tape Switch Assembly
3.2. Key Features
- OEM Replacement Part: Genuine BraunAbility component designed specifically for Braun wheelchair lifts.
- NHTSA 945 Compliant: Meets National Highway Traffic Safety Administration (NHTSA) 945 safety standards.
- Enhanced Safety: Functions as a safety sensor, detecting obstructions on the lift platform to prevent accidents.
- Durable Construction: Built to withstand heavy use and harsh conditions in various mobility applications.
- Easy Installation: Designed for straightforward installation, minimizing downtime and maintenance costs.
3.3. Product Images
Figure 3.1: The complete Braun 33337AKS Threshold Tape Switch Assembly, showing the two tape switch strips and the connecting wires with red terminals.
Figure 3.2: A closer view of the two black tape switch strips, which are designed to be installed on the threshold of a wheelchair lift to detect obstructions.
Figure 3.3: Detailed view of the red electrical connectors at the end of the tape switch assembly wires, designed for secure attachment to the lift's electrical system.
4. Setup and Installation
The Braun 33337AKS Threshold Tape Switch Assembly is designed for straightforward installation. However, due to the critical safety function of this component, it is highly recommended that installation be performed by a qualified technician familiar with Braun wheelchair lift systems and electrical safety procedures.
4.1. Pre-Installation Checklist
- Verify that the Braun 33337AKS is the correct replacement part for your specific Braun wheelchair lift model.
- Gather necessary tools (e.g., screwdrivers, wire strippers, multimeter).
- Ensure the lift's power supply is completely disconnected and secured against accidental re-engagement.
- Inspect the new tape switch assembly for any visible damage before installation.
4.2. Installation Steps (General Guidelines)
- Carefully remove the existing, faulty threshold tape switch assembly from the wheelchair lift, noting its exact placement and wiring connections.
- Clean the installation area on the lift's threshold to ensure proper adhesion or secure mounting of the new switch.
- Position the new Braun 33337AKS assembly in the same location as the original, ensuring the tape switches are correctly aligned to detect obstructions across the threshold.
- Connect the red electrical terminals of the new assembly to the corresponding wiring on the wheelchair lift's control system. Ensure connections are secure and insulated.
- Secure the wiring to prevent pinching or damage during lift operation.
- Once installed, carefully restore power to the lift and perform functional tests to verify the switch operates correctly (see Section 5. Operating Instructions).
5. Operating Instructions
The Braun 33337AKS Threshold Tape Switch Assembly operates as a safety interlock for your wheelchair lift. Its primary function is to detect any object or obstruction on the lift platform's threshold during operation.
- When the lift is in operation (e.g., deploying or stowing), the tape switch continuously monitors the threshold area.
- If an obstruction is detected by the tape switch (i.e., pressure is applied to the switch), the lift's control system will typically halt or reverse its movement to prevent damage or injury.
- The lift should not operate if the tape switch detects an obstruction. Clear any obstructions before attempting to operate the lift.
- Regularly test the functionality of the tape switch as part of your routine lift inspection.
6. Maintenance
Proper maintenance of the Braun 33337AKS Threshold Tape Switch Assembly ensures its longevity and continued safety performance.
- Regular Inspection: Visually inspect the tape switch and its wiring periodically (e.g., monthly or as recommended by your lift's manufacturer manual) for signs of wear, fraying, cuts, or damage.
- Cleaning: Keep the area around the tape switch clean and free of debris, dirt, or moisture that could interfere with its operation. Use a soft, damp cloth for cleaning; avoid harsh chemicals.
- Functional Testing: Periodically test the switch by gently applying pressure to the threshold area while attempting to operate the lift. The lift should stop or reverse, indicating the switch is functioning correctly.
- Replacement: If the tape switch shows signs of damage, intermittent operation, or fails functional tests, it must be replaced immediately with a genuine Braun 33337AKS assembly. Do not attempt to repair a damaged switch.
7. Troubleshooting
If you experience issues with your Braun 33337AKS Threshold Tape Switch Assembly, consider the following troubleshooting steps. Always ensure the lift's power is disconnected before inspecting wiring or components.
| Problem | Possible Cause | Solution |
|---|---|---|
| Lift does not operate, and no obstruction is present. |
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| Lift stops unexpectedly during operation without visible obstruction. |
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| Tape switch appears damaged (e.g., cut, frayed). | Physical damage to the switch or wiring. | Immediately replace the damaged Braun 33337AKS assembly. Do not attempt to repair. |
If troubleshooting steps do not resolve the issue, contact a certified BraunAbility service technician or your lift manufacturer for further assistance.
8. Specifications
| Attribute | Detail |
|---|---|
| Model Number | 33337AKS |
| Manufacturer | BraunAbility |
| Part Type | Threshold Tape Switch Assembly |
| Compliance | NHTSA 945 Safety Standards |
| Application | Braun Wheelchair Lifts |
| Number of Items | 1 |
| First Available | April 16, 2025 |
9. Warranty and Support
As an OEM replacement part, the Braun 33337AKS Threshold Tape Switch Assembly is manufactured by BraunAbility. For specific warranty information regarding this product, please refer to the documentation provided with your original wheelchair lift or contact BraunAbility directly.
For technical support, installation assistance, or to report a suspected faulty part, it is recommended to contact BraunAbility customer service or a certified BraunAbility service center.
BraunAbility Contact Information: Please visit the official BraunAbility website for the most current contact details, including phone numbers and support portals.