--- product_id: 612529956 title: "BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8\" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson" brand: "buymachineryparts" price: "631.74 DT" currency: TND in_stock: true reviews_count: 4 category: "Buymachineryparts" url: https://www.desertcart.tn/products/612529956-buymachineryparts-51a100-pto-overrunning-clutch-coupler-1-3-8-compatible store_origin: TN region: Tunisia --- # Supports up to 75 HP power output Direct OEM replacement for seamless compatibility 1 3/8'' female & male spline precision fit BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson **Brand:** buymachineryparts **Price:** 631.74 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Power up your tractor game with precision and ease! ## Quick Answers - **What is this?** BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson by buymachineryparts - **How much does it cost?** 631.74 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/612529956-buymachineryparts-51a100-pto-overrunning-clutch-coupler-1-3-8-compatible) ## Best For - buymachineryparts enthusiasts ## Why This Product - Trusted buymachineryparts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable & Reliable:** Crafted by BUYMACHINERYPARTS with quality materials to withstand tough agricultural environments and heavy use. - • **High Power Handling:** Built to handle up to 75 horsepower, ensuring robust performance under demanding tractor workloads. - • **Precision Spline Fit:** Engineered with 6-spline 1 3/8'' female and male connections for flawless PTO engagement. - • **Effortless PTO Hookup:** Streamlines your tractor’s PTO connection process, saving time and reducing frustration on the field. - • **OEM-Grade Compatibility:** Perfectly replaces OEM parts 51A100, S23639, ORC660QD, guaranteeing hassle-free installation on John Deere, Kubota, New Holland, and Massey Ferguson tractors. ## Overview The BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler is a high-quality, OEM-compatible replacement part designed for 1 3/8'' spline PTO shafts. Supporting up to 75 HP, it fits major tractor brands like John Deere, Kubota, New Holland, and Massey Ferguson, ensuring reliable, durable performance and effortless PTO hookup for professional-grade agricultural efficiency. ## Description Buy BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson: Spare & Replacement Parts - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: P t o overrunning clutch easy hookup - Worked out great so much easier to hook up my p t o now Review: works as expected - works as expected ## Features - Replace the OEM number：51A100 S23639 51A100A 23639 ORC660QD ORC660QDA - Fitment: Compatible with Kubota， Compatible with John Deere， Compatible with New Holland Tractor - Specification：Female spline 1 3/8''; Male spline 1 3/8''；6 Spline - Specification：Max HP: 75 - Replacement：Please confirm that your model has been OEM before purchasing ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | BUYMACHINERYPARTS | | Part Number | 51A100 | | Item Weight | 8.01 pounds | | Product Dimensions | 1 x 1 x 1 inches | | Item model number | 51A100 | | Color | / | | Included Components | / | | Batteries Included? | No | | Batteries Required? | No | ## Images ![BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson - Image 1](https://m.media-amazon.com/images/I/61qG-zwfkzL.jpg) ![BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson - Image 2](https://m.media-amazon.com/images/I/61ACLek8UvL.jpg) ![BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson - Image 3](https://m.media-amazon.com/images/I/71CnvDjM7+L.jpg) ![BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson - Image 4](https://m.media-amazon.com/images/I/61LCoYBSZ7L.jpg) ![BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson - Image 5](https://m.media-amazon.com/images/I/71Bv9O5Wt6L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ P t o overrunning clutch easy hookup *by A***R on May 13, 2026* Worked out great so much easier to hook up my p t o now ### ⭐⭐⭐⭐⭐ works as expected *by M***M on March 24, 2026* works as expected ### ⭐ Poor machining of parts *by J***. on August 26, 2024* I've worked on tractors for over 25 years. I’ve installed several different directional clutches for PTO Made IN USA. Noted that some people said there’s wobbling /sloppiness on the splines. Some people noted the PTO shaft was wobbling and going off balance while it was running. I installed this on a small B 2620Kubota tractor the four foot brush hog mower tested it out doing a perimeter and also on the field approximately 1000 feet it started to rattle and vibrate the whole machine and yes, I did grease it before I started, and I use a high-quality grease 3% Molly. I didn't even run it for an hour, starting to get nervous about how bad it was vibrating the whole PTO shaft on the more deck and the tractor. My personal opinion I wouldn't even give it a one star. When I get a chance, I'm going to take it apart and try and replace the Chinese bearings with a better set and see if this works to improve performance if not it'll be welded in the yard art. ## Frequently Bought Together - BUYMACHINERYPARTS 51A100 PTO Overrunning Clutch Coupler 1 3/8" Compatible with John Deere Kubota New Holland Tractor Massey Ferguson - THUNDERMINGO Fuel Sediment Bowl 2NAA9155B Assembly for Ford Tractor 8N 9N 2N fuel sediment bowl glass NAA Jubilee Tractor Massey Ferguson TE20 TO20 TO30 TO35 MF35 MF50 Replacement 180141M91 2N9155B - Standard Motor Products UC15T Ignition Coil for 12V Vehicles Without Electronic Ignition System --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/612529956-buymachineryparts-51a100-pto-overrunning-clutch-coupler-1-3-8-compatible](https://www.desertcart.tn/products/612529956-buymachineryparts-51a100-pto-overrunning-clutch-coupler-1-3-8-compatible) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-11-05*