1. Introduction
Thank you for choosing the YATO YT-07605 Torque Wrench. This manual provides essential information for the safe and effective use, setup, operation, and maintenance of your new tool. Please read these instructions carefully before use and retain them for future reference.
The YATO YT-07605 is a precision tool designed for tightening fasteners to a specific torque, ensuring proper assembly and preventing damage from over-tightening or under-tightening. It features a 1/2-inch square drive and a torque range of 20 to 220 Newton-meters (Nm).
2. Safety Instructions
WARNING: Failure to follow these safety instructions may result in injury or damage to the tool or workpiece.
- Always wear appropriate personal protective equipment, such as safety glasses, when using hand tools.
- Ensure the torque wrench is clean and free from oil or grease before use to maintain a secure grip.
- Do not use the torque wrench as a standard ratchet or breaker bar for loosening fasteners. It is designed for precise tightening only.
- Never exceed the maximum specified torque range of 220 Nm.
- Avoid dropping or subjecting the torque wrench to impact, as this can affect its calibration and accuracy.
- Store the torque wrench in its protective case (if provided) and set to the lowest torque setting (but not below the minimum) when not in use to relieve spring tension.
- Keep children and unauthorized persons away from the work area.
3. Product Overview
The YATO YT-07605 Torque Wrench consists of several key components:
- Drive Head: The square drive where sockets are attached. Includes a reversible ratchet mechanism.
- Main Scale: Displays the primary torque setting (e.g., in Nm).
- Micrometer Scale: Allows for fine adjustment of the torque setting.
- Locking Mechanism: Secures the torque setting to prevent accidental changes during use.
- Handle: Provides grip and leverage.
Figure 1: Torque Wrench Drive Head. This image shows the top view of the wrench head, highlighting the 1/2-inch square drive for attaching sockets and the lever for reversing the ratchet direction.
Figure 2: Torque Adjustment Handle. This image details the handle section, showing the main torque scale, the micrometer scale for fine adjustments, and the locking ring to secure the desired torque setting.
4. Specifications
| Feature | Value |
|---|---|
| Model Number | YT-07605 |
| Drive Size | 12.5 mm (1/2 inch) |
| Length | 495 mm |
| Torque Range | 20 - 220 Nm |
| Material | Steel |
| Weight | 1.55 kg |
5. Setup
Before using the torque wrench, ensure it is clean and in good working condition. Follow these steps to set the desired torque:
- Unlock the Handle: Locate the locking mechanism, usually a knurled ring or knob at the base of the handle. Rotate it counter-clockwise to unlock the handle, allowing it to turn freely.
- Set Main Torque: Rotate the handle until the desired main torque value aligns with the center line on the wrench body. For example, to set 100 Nm, align the '100' mark on the main scale with the center line.
- Fine-Tune with Micrometer Scale: Use the micrometer scale for precise adjustments. Each mark on the micrometer scale represents a specific increment (e.g., 1 Nm or 0.5 Nm, refer to the wrench markings). Rotate the handle until the desired micrometer value aligns with the center line. Add this value to your main torque setting. For example, if the main scale is at 100 Nm and you need 105 Nm, rotate the micrometer scale until '5' aligns with the center line.
- Lock the Handle: Once the desired torque is set, rotate the locking mechanism clockwise to secure the handle. This prevents accidental changes during operation.
- Attach Socket: Select the correct size socket for your fastener and attach it firmly to the 1/2-inch square drive head.
6. Operating Instructions
Using the torque wrench correctly is crucial for accurate results:
- Prepare the Fastener: Ensure the fastener and mating surfaces are clean and free of debris or corrosion. Apply lubricant if specified by the manufacturer.
- Position the Wrench: Place the socket onto the fastener. Hold the torque wrench by the handle, ensuring a firm and steady grip.
- Apply Force Smoothly: Apply slow, steady, and continuous force to the handle in the tightening direction. Avoid jerky movements.
- Listen for the Click: Continue applying force until you hear and feel a distinct "click" from the wrench. This indicates that the preset torque has been reached.
- Stop Immediately: As soon as the click is heard/felt, stop applying force. Do not continue to tighten the fastener further, as this will over-torque it.
- Remove Wrench: Remove the torque wrench from the fastener.
- Re-check (Optional): For critical applications, it is good practice to re-check the torque after a short period or after the component has settled.
Note: The click mechanism is designed to be audible and tactile. In noisy environments, rely more on the tactile feedback.
7. Maintenance
Proper maintenance ensures the longevity and accuracy of your torque wrench:
- Cleaning: After each use, wipe the wrench clean with a soft, dry cloth. Do not use solvents or harsh chemicals, as they may damage the finish or internal components.
- Storage: Store the torque wrench in its original case or a protective container to prevent damage. Always set the torque to the lowest setting (but not below the minimum specified by the manufacturer, typically 20 Nm for this model) before storing to relieve tension on the internal spring.
- Calibration: Torque wrenches are precision instruments and should be calibrated periodically, typically once a year or after 5,000 cycles, whichever comes first. Calibration should be performed by a qualified service center.
- Inspection: Regularly inspect the wrench for any signs of damage, wear, or loose parts. Do not use a damaged wrench.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Wrench does not click | Torque setting too low; Fastener already tight; Wrench damaged/out of calibration. | Verify torque setting; Check fastener tightness manually; Have wrench calibrated or inspected. |
| Inaccurate torque readings | Improper technique (jerky motion); Wrench dropped; Out of calibration. | Apply smooth, steady force; Avoid dropping; Calibrate wrench. |
| Handle difficult to turn/lock | Debris in mechanism; Locking ring overtightened or damaged. | Clean handle area; Do not force; Inspect for damage. |
9. Warranty Information
YATO products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or contact your local YATO distributor. Keep your proof of purchase for any warranty claims.
10. Customer Support
If you have any questions regarding the operation, maintenance, or troubleshooting of your YATO YT-07605 Torque Wrench, please contact your retailer or the official YATO customer support in your region. Always provide the model number (YT-07605) when seeking assistance.
