1. Introduction
This manual provides essential information for the installation, operation, and maintenance of replacement parts for Panasonic dryers, specifically the Belt Tensioner and Door Hook Spring. Please read these instructions carefully before attempting any installation or repair to ensure safety and proper function.
2. Product Overview
These parts are designed as direct replacements for specific Panasonic dryer models. Two main types are covered:
- Belt Tensioner: An elastic tensioner pulley system crucial for maintaining proper tension on the dryer's drive belt, ensuring smooth operation of the drum.
- Door Hook Spring: A component of the dryer door latch mechanism, essential for securely closing the dryer door during operation.


3. Specifications
Key specifications for the replacement parts are provided below. Please ensure these match your existing part before installation.
| Attribute | Value |
|---|---|
| Type | Washing Machine Parts (Dryer Parts) |
| Origin | Mainland China |
| Models Covered | NH45-19T, 45-18T, NH35-31T, 30T |
3.1. Belt Tensioner Dimensions

3.2. Door Hook Spring Dimensions
While a detailed diagram is not available, the Door Hook Spring is designed to fit standard Panasonic dryer door latch mechanisms. Please compare visually with your existing part for compatibility.
4. Setup and Installation
Safety First: Always disconnect power to the dryer before attempting any repairs or installations. Wear appropriate safety gear, such as gloves.
- Access the Component: Depending on your dryer model, you may need to remove the top panel, front panel, or rear panel to access the belt tensioner or door latch mechanism. Refer to your specific dryer's service manual for detailed disassembly instructions.
- Remove Old Part:
- For Belt Tensioner: Carefully release the tension on the dryer belt and remove the old tensioner assembly. Note its orientation and how it connects to the belt and mounting points.
- For Door Hook Spring: Locate the door latch mechanism. The spring is typically part of this assembly. Carefully detach the old spring, noting its position and how it engages with the hook.
- Install New Part:
- For Belt Tensioner: Position the new belt tensioner (Figure 1 and Figure 3) in the same orientation as the old one. Ensure the pulley is correctly aligned with the dryer belt. Re-engage the belt and verify proper tension.
- For Door Hook Spring: Attach the new door hook spring (Figure 2) to the door latch mechanism, ensuring it provides adequate tension for the door hook to engage securely.
- Reassemble Dryer: Once the new part is securely installed, reassemble the dryer panels in reverse order of disassembly.
- Test Functionality: Restore power to the dryer and perform a test cycle to ensure the new part functions correctly and the dryer operates as expected.

5. Operating Instructions
These parts are internal components and do not have direct user operating controls. Their function is integral to the dryer's automatic operation:
- Belt Tensioner: Automatically maintains optimal tension on the dryer drum belt, allowing the drum to rotate smoothly during drying cycles.
- Door Hook Spring: Ensures the dryer door remains securely latched throughout the drying cycle, preventing interruptions and ensuring safety.
Once installed correctly, the parts should operate seamlessly as part of your dryer's system.
6. Maintenance
These replacement parts are designed for durability and typically require minimal maintenance. However, periodic inspection can prolong their lifespan and prevent future issues:
- Belt Tensioner: During routine dryer maintenance (e.g., cleaning lint traps, checking ducts), visually inspect the tensioner pulley for signs of wear, cracks, or excessive wobble. Ensure the spring mechanism is still providing adequate tension.
- Door Hook Spring: Check the door latch mechanism for smooth operation. If the door feels loose or doesn't latch securely, inspect the spring for deformation or breakage.
Clean any lint or debris that may accumulate around these components, as this can impede their function.
7. Troubleshooting
If you experience issues after replacing these parts, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| Dryer drum not spinning or making grinding noise (after tensioner replacement) | Belt not properly seated on tensioner pulley or motor shaft; tensioner installed incorrectly. | Disconnect power, re-open dryer, and verify belt routing and tensioner installation. Ensure the belt is not twisted or off-track. |
| Dryer door not latching securely or opening during cycle (after spring replacement) | Door hook spring installed incorrectly or damaged during installation; latch mechanism misalignment. | Disconnect power, inspect the door hook spring and latch mechanism. Ensure the spring is correctly seated and providing tension. Check for any obstructions. |
| Dryer not starting | Door not fully closed (if door switch is part of the latch assembly). | Ensure the door is firmly closed. If the issue persists, the door switch itself might be faulty (not directly related to the spring, but often associated). |
If troubleshooting steps do not resolve the issue, it is recommended to consult a qualified appliance technician.
8. User Tips
While no specific user reviews or Q&A were provided for this product, general tips for dryer part replacement include:
- Take photos or videos of the disassembly process to aid in reassembly.
- Keep all screws and small parts organized during the repair.
- Always use genuine or high-quality replacement parts to ensure compatibility and longevity.
- If unsure about any step, seek professional assistance.
9. Warranty and Support
For warranty information or technical support, please refer to the seller's policies or contact the seller directly through the platform where the purchase was made. Ensure you retain your proof of purchase for any warranty claims.





