How to Check and Maintain Drive Hydraulic Wrench Safely

Drive hydraulic wrench Inspection: What You Must Know

Drive Hydraulic Wrenches are essential tools for heavy-duty bolting operations, especially when dealing with large-size bolts in industrial environments. Regular inspection and maintenance are critical to ensure performance and extend service life.

Why Regular Inspection of Hydraulic torque wrenches is Crucial

In applications that require precision torque and high clamping force, a malfunctioning hydraulic wrench can lead to operational delays or bolt failure. To prevent such risks, maintenance personnel must follow a detailed inspection procedure before and during use.

Key Points to Inspect in a Drive Hydraulic Wrench

1. Hydraulic Components and Pressure Compatibility

Check whether all hydraulic parts, including matching fittings and accessories, are rated for the same pressure as the hydraulic pump. Mismatched pressure levels can lead to leaks or system failure.

2. Hose and Fitting Conditions

Inspect high-pressure hoses for any signs of twisting, entanglement, or wear. Ensure the square drive shaft and locking mechanisms are firmly and safely connected. Deformed couplings or bent elbows must be replaced immediately to avoid accidents.

3. Secure Hose Connections After Assembly

After connecting the hydraulic wrench to the pump, verify that all high-pressure hose joints are tightened and secured. Loose connections are a major safety hazard.

4. Perform a Dry Run (No-Load Operation)

Before tightening bolts, conduct a few no-load runs to check the wrench’s rotation behavior. Press the “IN” button on the remote control and observe the tool's action. A “click” sound indicates the wrench has reached its limit. Repeat 3–5 times and ensure the tool operates smoothly without abnormal noise or vibration.

5. Confirm Drive Shaft Direction

Face the bolt directly to determine the tightening direction: clockwise for tightening, counterclockwise for loosening. Misinterpreting the rotation can damage the bolts or the tool.

Torque Verification During Bolt Inspection

For high-strength bolts, the recommended inspection method is re-tightening using a hydraulic wrench. If the wrench doesn’t rotate at the preset torque, the bolt is secure. If it does rotate, the bolt may have loosened and needs to be re-tightened to meet torque standards.

Procure Certified Hydraulic Wrenches from BOLTING

At Ningbo SAIVS Machinery Co., Ltd, we offer professionally engineered drive Hydraulic Torque Wrenches suitable for a wide range of industrial applications. Our tools are reliable, safe, and tested to meet international standards.

Contact us today for product inquiries or to get a quote:

Address: No. 626 Yuncai Road, Yunlong Town, Yinzhou, Ningbo, Zhejiang, China
Tel: +86-574-88188161
Phone/Whatsapp: +8613905748980
Email: seo1@saivs.com
Director: Mr. Jackie Zhou