1. Product Overview
The Okin Bed Spindle Block Assembly is a replacement component specifically designed for Okimat II adjustable bed or hospital bed motors. Each Okimat II motor unit contains two such spindle blocks, one for the head section and one for the foot section of the bed. This assembly is crucial for the linear movement mechanism of the bed, translating the motor's rotational energy into the up and down motion of the bed sections.
If your Okimat II motor is running but the bed section is not moving, or if you hear a grinding noise, the spindle block may be broken or stripped. This replacement part allows for a cost-effective repair, restoring the full functionality of your adjustable bed.
Figure 1.1: The Okin Bed Spindle Block Assembly, showing the white plastic block and the threaded metal spindle with a bearing.
2. Key Features
- Direct replacement for Okimat II Bed Motors.
- Two units required per Okimat II motor (one for head, one for foot).
- Designed for easy do-it-yourself installation.
3. Compatibility
This spindle block assembly is specifically compatible with Okimat II adjustable bed and hospital bed motors. It is important to verify that your bed motor is an Okimat II model before purchasing this replacement part. While there are two spindle blocks within an Okimat II motor, the replacement parts are universally compatible for both head and foot sections.
4. Setup and Installation
4.1 Tools Required
- Screwdriver set (Phillips head typically required)
- Dielectric grease (optional, but recommended for bearing longevity)
- Clean cloth
4.2 Installation Steps
- Prepare the Bed: Ensure the adjustable bed is fully lowered and unplugged from the power source before beginning any repair work. This is a critical safety step.
- Access the Motor Assembly: Carefully remove the Okimat II motor assembly from the bed frame. This typically involves unscrewing several fasteners (often around 11 screws) that secure the motor casing.
- Identify the Damaged Spindle Block: Once the motor casing is open, locate the two spindle blocks. Identify the one that is broken or stripped. You may notice the motor running but the associated bed section not moving, indicating the faulty block.
- Remove the Old Spindle Block: Carefully extract the damaged spindle block and its associated threaded rod from the motor assembly.
- Apply Lubrication (Recommended): Before installing the new spindle block, apply a small amount of dielectric grease to the bearing of the new assembly. This helps ensure smooth operation and extends the life of the component.
- Install the New Spindle Block: Insert the new spindle block assembly into its correct position within the motor casing. Ensure the threaded rod aligns properly with the motor's drive mechanism.
- Reassemble the Motor: Close the motor casing and secure it with all previously removed screws.
- Reinstall Motor Assembly: Reattach the motor assembly to the bed frame.
- Test and Adjust Wiring (If Necessary): Plug the bed back in and test its operation. If, after replacement, the bed section moves in the opposite direction (e.g., pressing 'up' makes it go 'down'), you will need to reverse the wires that plug into the motor on that specific end. These are typically terminal ends that can be carefully swapped without soldering.
Figure 4.1: The spindle block and threaded rod assembly, shown separated for clarity during installation.
Figure 4.2: The threaded rod component, illustrating the direction of rotation for proper engagement.
5. Operating Principles
The spindle block assembly works in conjunction with the Okimat II motor to convert rotational motion into linear motion. The motor drives the threaded rod, which passes through the spindle block. As the rod rotates, the internal threading of the block causes it to move along the rod, either extending or retracting the bed's support mechanism. This precise movement allows for the adjustment of the bed's head and foot sections.
6. Maintenance
Regular maintenance can extend the lifespan of your spindle block assembly and the overall bed motor. While the spindle block itself is a sealed unit, periodic inspection and lubrication of the threaded rod and bearing are recommended.
- Inspection: Periodically inspect the spindle block and threaded rod for any signs of wear, cracks, or debris accumulation.
- Lubrication: If accessible, apply a small amount of dielectric grease or a similar non-corrosive lubricant to the threaded rod and the bearing of the spindle block annually, or if you notice any stiffness in movement.
- Cleaning: Keep the area around the motor and spindle blocks free from dust and debris, which can impede smooth operation.
7. Troubleshooting
7.1 Common Issues and Solutions
- Motor Runs, But Bed Section Does Not Move:
Cause: The spindle block is likely stripped or broken.
Solution: Replace the damaged spindle block assembly. This is the most common reason for this symptom. - Bed Section Moves in Opposite Direction After Replacement:
Cause: The motor's wiring for that specific section is reversed.
Solution: Carefully reverse the lead wires that plug into the motor on the affected end. These are typically terminal connections that can be swapped. - Block Height Issues or Magnets Not Fitting:
Cause: Minor manufacturing variations or specific requirements for limit switches.
Solution: Some users have reported needing to shim the bottom of the block to make proper contact with limit switches or modifying the block (e.g., with a Dremel tool) to fit magnets from the old gear. This may require advanced DIY skills. - Grinding Noises During Operation:
Cause: Worn bearing, lack of lubrication, or debris.
Solution: Inspect the bearing and threaded rod. Apply dielectric grease. If the noise persists, the bearing may be failing, necessitating replacement of the spindle block.
8. Specifications
| Specification | Value |
|---|---|
| Item Weight | 13.9 ounces |
| Package Dimensions | 10.75 x 4.37 x 2.2 inches |
| ASIN | B01M185OJ1 |
| Date First Available | October 2, 2016 |
Figure 8.1: The spindle block assembly with approximate dimensions for reference.
9. Warranty and Support
For specific warranty information regarding your Okin Bed Spindle Block Assembly, please refer to the original product packaging or contact the manufacturer directly. As a replacement part, its warranty may be limited.
For technical support or further inquiries, please contact Okin customer service through their official channels. You can often find contact information on the Okin brand store page or through your original point of purchase.
