{"product_id":"pto-shaft-1-3-8-6-spline-series-4-tractor-driveline-39-55-adjustable","title":"PTO Shaft 1-3\/8\" 6 Spline Series 4 Tractor Driveline, 39\"-55\" Adjustable for Brush Hog Finish Mower","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003ePTO Shaft 1-3\/8\" 6 Spline Series 4 — Heavy-Duty Adjustable Driveline for Tractors \u0026amp; Implements\u003c\/h2\u003e\n    \u003cp\u003eWhen your brush hog, finish mower, or rotary cutter needs a reliable power connection, a worn or mismatched PTO shaft can bring your whole operation to a halt. This Series 4 PTO driveline shaft is built for farmers, landowners, and equipment operators who demand consistent torque transfer without the worry of premature failure.\u003c\/p\u003e\n    \u003cp\u003eConstructed from Q345 steel tubing with a solid 20CrMnTi carburized steel universal joint, this shaft features a 1-3\/8\" (35 mm) 6-spline tractor end and a round implement end. The telescoping design adjusts from 39\" (1,000 mm) compressed to 55\" (1,400 mm) extended, accommodating a wide range of tractor-to-implement distances.\u003c\/p\u003e\n    \u003cp\u003eIdeal for Series 4 PTO applications including brush hog PTO shaft replacement, finish mower driveline upgrades, and rotary cutter power transmission — this shaft delivers 35 HP \/ 460 Nm torque at 540 RPM and 53 HP \/ 360 Nm at 1,000 RPM, making it a versatile fit for mid-size agricultural equipment.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e✅\u003c\/span\u003e\n    Compatible with 1-3\/8\" 6-spline tractor PTOs and round-end implements — brush hogs, finish mowers, rotary cutters, tillers, and other Series 4 agricultural equipment\n  \u003c\/div\u003e\n\n  \u003cdiv\u003e\n    \u003ch2\u003e✅ Key Features of This Series 4 PTO Drive Shaft\u003c\/h2\u003e\n    \u003cul class=\"hdiy-features\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eCE-Certified Series 4 Construction:\u003c\/strong\u003e Forged with a solid 20CrMnTi carburized steel universal joint and Q345 steel tube inside the shield — built to handle demanding field conditions with long-term durability.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003e1-3\/8\" 6-Spline to Round End:\u003c\/strong\u003e Standard 6-spline tractor end pairs with a round implement end, providing a secure, rattle-free fit for most brush hog and finish mower applications.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eAdjustable 39\"–55\" Length:\u003c\/strong\u003e Telescoping steel tube design compresses to 39\" \/ 1,000 mm and extends to 55\" \/ 1,400 mm — no cutting or custom fabrication required for most setups.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e💪\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eHigh Torque Output:\u003c\/strong\u003e Rated at 35 HP \/ 26 kW \/ 460 Nm at 540 RPM and 53 HP \/ 39 kW \/ 360 Nm at 1,000 RPM — handles mid-size tractor workloads without slipping or overheating.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eSafety Shield \u0026amp; Security Chain:\u003c\/strong\u003e Includes a full-length protective shield and security chain to reduce entanglement risk and meet standard safety requirements for PTO-driven equipment.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eDirect Replacement, Easy Assembly:\u003c\/strong\u003e Designed as a drop-in replacement for worn Series 4 PTO shafts — no special tools needed, straightforward installation for quick field-side swaps.\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-list\"\u003e\n    \u003ch2\u003e📦 What's in the Box\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e1× Series 4 PTO Drive Shaft (1-3\/8\" 6-Spline × Round End, 39\"–55\" adjustable)\u003c\/li\u003e\n      \u003cli\u003e1× Full-length protective shield with security chain\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-usecases\"\u003e\n    \u003ch2\u003e🎯 Who Is This For?\u003c\/h2\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🚜\u003c\/span\u003e\n      \u003cstrong\u003eBrush Hog \u0026amp; Rotary Cutter Operators\u003c\/strong\u003e\n      \u003cp\u003eReplacing a worn or broken PTO shaft on a bush hog or rotary cutter? This Series 4 shaft fits standard 1-3\/8\" 6-spline connections and handles the torque demands of heavy brush clearing.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🌾\u003c\/span\u003e\n      \u003cstrong\u003eFinish Mower Users\u003c\/strong\u003e\n      \u003cp\u003eNeed a reliable driveline for a finish mower on a compact or utility tractor? The adjustable length and round implement end make this a straightforward fit for most finish mower setups.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🏡\u003c\/span\u003e\n      \u003cstrong\u003eLandowners \u0026amp; Hobby Farmers\u003c\/strong\u003e\n      \u003cp\u003eMaintaining pastures, fields, or large properties with a mid-size tractor? This shaft provides the power transmission you need without the dealer markup of OEM replacement parts.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🔧\u003c\/span\u003e\n      \u003cstrong\u003eEquipment Repair \u0026amp; Parts Sourcing\u003c\/strong\u003e\n      \u003cp\u003eSourcing a Series 4 PTO shaft for a customer repair or parts inventory? CE-certified construction and standard dimensions make this a dependable aftermarket option.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eSeries 4\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTractor End\u003c\/th\u003e\n\u003ctd\u003e1-3\/8\" (35 mm) — 6 Spline\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eImplement End\u003c\/th\u003e\n\u003ctd\u003eRound End\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompressed Length\u003c\/th\u003e\n\u003ctd\u003e39\" \/ 1,000 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eExtended Length\u003c\/th\u003e\n\u003ctd\u003e55\" \/ 1,400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTorque @ 540 RPM\u003c\/th\u003e\n\u003ctd\u003e460 Nm \/ 35 HP \/ 26 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTorque @ 1,000 RPM\u003c\/th\u003e\n\u003ctd\u003e360 Nm \/ 53 HP \/ 39 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTube Material\u003c\/th\u003e\n\u003ctd\u003eQ345 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eUniversal Joint Material\u003c\/th\u003e\n\u003ctd\u003e20CrMnTi Carburized Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish \/ Color\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCertification\u003c\/th\u003e\n\u003ctd\u003eCE Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eProduct Weight\u003c\/th\u003e\n\u003ctd\u003e22.75 lbs (10.32 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAssembled Dimensions\u003c\/th\u003e\n\u003ctd\u003e39.46\" L × 5.41\" W × 5.80\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePackage Dimensions\u003c\/th\u003e\n\u003ctd\u003e39.96\" L × 5.91\" W × 6.30\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePackage Weight\u003c\/th\u003e\n\u003ctd\u003e24.25 lbs (11.00 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat tractors is this PTO shaft compatible with?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThis shaft is designed for tractors with a standard 1-3\/8\" 6-spline PTO output. It is compatible with most compact and utility tractors from brands such as John Deere, Kubota, Massey Ferguson, New Holland, and others that use this standard connection. Always verify your tractor's PTO spline count and diameter before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat implements does the round end fit?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe round implement end is designed to fit implements with a corresponding round-bore yoke. This typically includes many brush hogs, finish mowers, rotary cutters, and tillers. Check your implement's input shaft specification to confirm compatibility before purchase.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between Series 3 and Series 4 PTO shafts?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSeries 4 shafts are rated for higher torque and horsepower than Series 3. Series 4 is generally used on implements requiring up to approximately 35–53 HP, while Series 3 is suited for lighter-duty applications. Always match the shaft series to your implement's rated input requirements.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this shaft at both 540 RPM and 1,000 RPM?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This shaft is rated for both 540 RPM (35 HP \/ 460 Nm) and 1,000 RPM (53 HP \/ 360 Nm) operation. Ensure your tractor and implement are set to the correct PTO speed for your application.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I measure the correct PTO shaft length for my setup?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure the distance from your tractor's PTO output to your implement's input shaft with the implement in its working position. The shaft should be at roughly mid-extension during operation — not fully compressed or fully extended. This shaft adjusts from 39\" to 55\", so it is suitable for setups within that range.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eIs the safety shield included, and is it required?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, a full-length protective shield and security chain are included. The shield is strongly recommended for safe operation — it reduces the risk of entanglement with the rotating shaft. Many regions also require PTO shields by law or safety regulation when operating agricultural equipment.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does CE certification mean for this PTO shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCE certification indicates that this product meets European safety, health, and environmental protection standards. For PTO shafts, this typically covers mechanical safety requirements including the protective shield design. It is a widely recognized quality and safety benchmark for agricultural driveline components.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I install this PTO shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSlide the 6-spline end onto your tractor's PTO output shaft until it clicks into place. Connect the round end to your implement's input yoke and secure it. Attach the security chain from the shield to a fixed point on the tractor or implement to prevent the shield from rotating. Always disengage the PTO and shut off the tractor before making any connections or adjustments.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e🛒 Add to cart above and get your Series 4 PTO shaft shipped fast.\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Default Title","offer_id":52193431879954,"sku":"T3342P298262","price":126.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/05eb9a8aa05c788f6743af23c30838fc.jpg?v=1776062119","url":"https:\/\/homediyer.com\/products\/pto-shaft-1-3-8-6-spline-series-4-tractor-driveline-39-55-adjustable","provider":"HomeDIYer","version":"1.0","type":"link"}