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Here’s an SEO-optimized product title and description for your backhoe key switch:

 Product Title:
D 134737 Key Switch for Case 580 Backhoe Parts - Compatible with SE, K, SK, L, SL, M, SM, M2, M3, SM2, SM3, N, SN Models

 Product Description:
Enhance the performance of your Case 580 backhoe with the D 134737 Key Switch (CNH). Designed for compatibility with a wide range of models, including SE, K, SK, L, SL, M, SM, M2, M3, SM2, SM3, N, and SN, this key switch ensures reliable ignition and operational efficiency. 

**Features:**
- **OEM Quality**: Manufactured to meet original equipment specifications for a perfect fit and superior performance.
- **Wide Compatibility**: Fits multiple Case 580 backhoe models, making it a versatile choice for operators.
- **Durable Construction**: Built to withstand harsh working conditions, ensuring longevity and dependable operation.
- **Easy Installation**: Designed for straightforward installation, allowing you to get back to work quickly.

**Upgrade your backhoe’s ignition system today with the D 134737 Key Switch and experience improved reliability and performance on the job site.** 

This title and description should help improve your product's visibility and attract potential customers searching for backhoe parts online.