Troubleshooting and Resolving Hydraulic Torque Wrench Non-Rotation Issue

Hydraulic torque wrenches are essential tools in various industrial applications, ensuring precise tightening of bolts with controlled torque. 

However, improper usage can lead to common malfunctions, such as the wrench failing to rotate. 

This article will delve into the potential reasons behind a hydraulic torque wrench not rotating, how to troubleshoot the issue, and solutions to rectify it.

Causes of Hydraulic Torque Wrench Non-Rotation

1. Seizure between the Drive Frame and Ratchet:

• One common cause for a hydraulic torque wrench to stop rotating is a seizure between the drive frame and the ratchet. This can occur due to improper alignment or the presence of foreign objects obstructing movement.

2. Jamming of Ratchet and Pawl Mechanism:

• The ratchet and pawl mechanism may become jammed, leading to the non-rotation of the wrench. This is often caused by debris or wear and tear within the system.

3. Drive Frame Torsion Spring Misalignment:

• If the torsion spring within the drive frame does not return to its original position, it can prevent the wrench from rotating. This misalignment can result from prolonged use or improper handling.

Root Causes of the Malfunction

During standard operation, pressing the remote control button of a hollow hydraulic torque wrench allows hydraulic fluid to flow, initiating the rotation of the drive shaft. 

Once the shaft ceases movement, releasing the button should produce a clicking sound, indicating the wrench has reset and is ready for the next operation cycle. 

Failure to hear this sound before releasing the button can cause the ratchet to jam, interrupting the cycle. 

Additionally, normal wear and tear can contribute to these mechanical obstructions.

Troubleshooting and Resolving the Issue

To address the non-rotation of a hydraulic torque wrench, follow these steps:

1. Inspect and File the Ratchet and Pawl Mechanism:

• Use a fine-toothed triangular file to smooth any irregularities on the ratchet and pawl mechanism. This will help eliminate any blockages caused by burrs or damage, ensuring smooth operation.

2. Adjust the Torsion Spring Position:

• Check the position of the torsion spring in the drive frame. Realign it if necessary to ensure it returns correctly to its default position. This adjustment can prevent future occurrences of non-rotation due to spring misalignment.

3. Replace Damaged Components:

• If there are cracks in the drive frame or the ratchet and pawl mechanism has chipped teeth, it is essential to replace these components. Continuing to use damaged parts can lead to further malfunctions and potentially hazardous situations.

4. Regular Maintenance and Inspection:

• Schedule regular maintenance checks for the hydraulic torque wrench. Inspect the hydraulic transmission system periodically and address any issues promptly. If the hydraulic system fails to operate correctly, stop using the wrench immediately and seek professional assistance.

Professional Consultation

For complex issues beyond basic troubleshooting, it is advisable to consult with experts. 

Hydraulic torque wrenches are specialized tools that require proper handling and expert guidance for optimal performance. Ningbo SAIVS Machinery Co., Ltd provides professional support and technical assistance for any hydraulic torque wrench concerns. 

Feel free to contact our team for expert advice and solutions.

Contact Information:Ningbo SAIVS Machinery Co., Ltd
Address: NO. 626 Yuncai Road, Yunlong Town, Yinzhou Ningbo Zhejiang China
Phone/Whatsapp: +8613905748980
Email: seo1@saivs.com
Director/CEO/General Manager: Mr. Jackie Zhou