1. Product Overview
The Richmat HJA35 Hall Leg Actuator is a replacement component designed for adjustable bed bases. This actuator is responsible for the movement of the bed's leg section, enabling users to adjust the bed's position for comfort. It features an 8-pin power connector and specific stroke dimensions for compatibility with various adjustable bed models.

Image 1.1: The Richmat HJA35 Hall Leg Actuator. This image displays the complete actuator unit, including the motor, linear shaft, and attached power cable with its 8-pin connector.
Key Features:
- Model: HJA35 Hall
- Power Connector: 8-pin
- Stroke/Installation Length: 115/303mm
- Designed for adjustable bed bases
2. Compatibility Check
Before installing the HJA35 actuator, it is crucial to verify its compatibility with your existing adjustable bed base. Please ensure that your current actuator is also a Richmat HJA35 Hall model and that the power connector matches the 8-pin configuration shown below.

Image 2.1: Product label on the Richmat HJA35 actuator. This label provides essential information such as the item number (HJA35 HALL), rated voltage (DC 24V, 3A), maximum push force (6000N), stroke/installation length (115/303mm), and duty cycle (10%, Max 2min ON/18min OFF).

Image 2.2: Close-up of the 8-pin power connector. This image shows the specific pin configuration of the connector, which must match your bed base's receptacle for proper connection.
Refer to the label on your existing actuator for model number verification. If the model number or connector type differs, this replacement part may not be compatible.
3. Setup and Installation
Safety First: Always unplug your adjustable bed base from the power outlet before attempting any installation or replacement procedures to prevent electrical shock or injury.
Installation Steps:
- Disconnect Power: Unplug the adjustable bed base from the wall outlet.
- Locate Actuator: Identify the actuator responsible for the leg section movement. It is typically mounted to the bed frame.
- Remove Old Actuator:
- Carefully disconnect the 8-pin power cable from the control box.
- Unbolt or unclip the old actuator from its mounting points on the bed frame. Note the orientation for reinstallation.
- Install New Actuator:
- Position the new HJA35 actuator in the same orientation as the old one.
- Securely attach the actuator to the bed frame using the original bolts or clips. Ensure all connections are tight.
- Connect the 8-pin power cable of the new actuator to the corresponding port on the bed's control box. Ensure the connection is firm and fully seated.
- Test Functionality:
- Plug the adjustable bed base back into the power outlet.
- Using your bed's remote control, test the leg section's up and down movement to ensure the new actuator is functioning correctly and smoothly.
If you encounter any difficulties or are unsure about any step, consult a qualified technician or the bed base manufacturer's support.
4. Operating Instructions
The Richmat HJA35 Hall Leg Actuator operates in conjunction with your adjustable bed base's control system and remote. Once installed, its operation is seamless and integrated with the bed's standard functions.
Basic Operation:
- Use the designated buttons on your adjustable bed's remote control to raise or lower the leg section.
- The actuator will extend or retract, moving the bed frame to the desired position.
- Release the button when the desired position is reached.
Important: Do not exceed the weight capacity of your adjustable bed base. Avoid placing objects or body parts in the moving mechanisms of the bed while it is operating.
5. Maintenance
The Richmat HJA35 Hall Leg Actuator is designed for minimal maintenance. Regular inspection can help ensure its longevity and proper function.
Maintenance Tips:
- Regular Inspection: Periodically check the actuator and its mounting points for any signs of wear, loose bolts, or damage.
- Cable Check: Ensure the power cable is not pinched, frayed, or damaged. Keep it clear of moving parts.
- Cleaning: If necessary, gently wipe the exterior of the actuator with a dry or slightly damp cloth. Do not use harsh chemicals or abrasive cleaners. Ensure no liquids enter the motor housing.
- Lubrication: The actuator is factory-lubricated and generally does not require additional lubrication. Do not attempt to lubricate internal components unless specifically instructed by the manufacturer.
Duty Cycle: Note the specified duty cycle of 10% (Max 2min ON/18min OFF). This means the actuator should not be operated continuously for more than 2 minutes, followed by an 18-minute rest period. Exceeding the duty cycle can lead to overheating and premature failure.
6. Troubleshooting
If your adjustable bed's leg section is not functioning correctly after installing the HJA35 actuator, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Actuator does not move. |
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| Actuator moves slowly or intermittently. |
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| Unusual noises from actuator. |
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For problems not listed here, or if solutions do not resolve the issue, contact the manufacturer or seller for further assistance.
7. Specifications
- Model: HJA35 Hall
- Rated Voltage: DC 24V, 3A
- Max Push: 6000N
- Stroke/Installation Length: 115/303mm
- Duty Cycle: 10% (Max 2min ON / 18min OFF)
- Connector Type: 8-pin
- Protection Class: IP20
8. Warranty and Support
For information regarding the warranty of your Richmat HJA35 Hall Leg Actuator, please refer to the documentation provided with your original purchase or contact the seller directly. Warranty terms may vary based on the retailer and region.
If you require technical support or have questions about the installation or operation of this actuator, please contact the Richmat customer service or the retailer from whom you purchased the product. Provide your product model number (HJA35) and purchase details when seeking support.