Product Description
Shimano 10CBP Dog Spring (TT0301)
The Shimano 10CBP Dog Spring (TT0301) is a precision-tensioned internal component critical to the anti-reverse system of Shimano’s heavy-duty saltwater and trolling reels. This spring provides the constant pressure required to keep the anti-reverse "dog" (pawl) engaged with the ratchet gear, preventing the handle from spinning backward under the immense pressure of a hooked fish.
In a high-torque environment, the dog spring is the primary fail-safe for your reel’s drive train. Over time, these springs can lose their elasticity, become bent during maintenance, or succumb to "salt-creep" corrosion. A failing dog spring often results in an intermittent anti-reverse or a complete failure of the handle to lock, which can lead to "knuckle-busting" handle spins. Replacing it with this genuine Shimano factory part ensures the safety and reliability of your reel’s stopping power.
Product Specifications
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Part Name: Dog Spring
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Part Number: 10CBP
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Shimano Code: TT0301
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Material: Marine-Grade Spring Steel
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Function: Maintains tension on the anti-reverse pawl (dog) against the ratchet.
Alternate Part Numbers
This part is identified in various technical service manuals and regional catalogs by the following identification number:
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TT0301
Compatibility & Fitment
The 10CBP (TT0301) is a specialized component used in Shimano’s robust conventional and lever drag series. It is a direct factory fit for the following models:
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Shimano Tyrnos Series: TYR-16, TYR-20, TYR-30 (including 2-Speed and Single Speed versions)
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Shimano TLD Series: TLD-15, TLD-20, TLD-25
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Shimano Tekota Series: Fits select larger frame models (Verify via TT code)
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Shimano Torium Series: Select legacy models (Check specific schematic for TT0301)
Pro Tip: When installing the dog spring, ensure the "legs" of the spring are correctly seated around the anti-reverse dog and the frame post. Improper orientation can cause the spring to bind or pop off during use. For a detailed visual guide on the correct positioning of the anti-reverse system, refer to the PDF schematics at www.reelschematic.com.
Key Features
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Heavy-Duty Tension: Engineered to maintain its shape and pressure even after thousands of handle cycles.
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Corrosion Resistance: Specially treated alloy to prevent rust-weakening in saltwater environments.
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Safety Essential: Restores the definitive "stop" in your reel’s handle, crucial for setting the hook and managing heavy drag.
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Direct OEM Fit: Guaranteed to match the exact dimensions required for the Tyrnos and TLD internal housings.
