Product Description
Hardy 1540724 Regulator Wire - Princess & St. Aidan
Product Description
Restore the precise drag adjustment functionality of your classic fly reel with the Hardy 1540724 Regulator Wire. This genuine replacement part is the essential link within the reel's rim-mounted check mechanism.
Designed to transfer tension from the external regulator button to the internal check spring, this tempered wire form allows anglers to fine-tune the resistance of the click-check system. Over time, the original wire can become bent or fatigued, leading to a loss of drag range or inconsistent tension. Installing this factory-specification component ensures your reel retains its ability to protect light tippets and manage strong runs.
Compatibility
This part is precision-engineered for the following Hardy Lightweight series models:
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Hardy Princess (3 1/2" Diameter)
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Hardy St. Aidan (3 3/4" Diameter)
Product Specifications
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Part Number: 1540724
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Part Type: Regulator Wire / Check Tension Arm
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Material: Tempered Steel / Stainless Steel
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Application: Internal check mechanism (connects cam to spring)
Alternate Part Numbers
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1328917
Maintenance Recommendation
To ensure the regulator wire slides smoothly across the cam and spring without binding, we recommend applying Deuthlon Reel Grease or Oil. Their advanced ceramic-based lubricants prevent wear at metal-to-metal contact points and protect the internal mechanism from corrosion in damp environments.
Technical Reference
For detailed assembly views and to confirm the correct orientation of the regulator wire within the check system, please consult the PDF schematics available at www.reelschematic.com.

