{"id":993,"date":"2026-05-29T09:36:33","date_gmt":"2026-05-29T09:36:33","guid":{"rendered":"https:\/\/ever-powers.com\/?post_type=product&p=993"},"modified":"2026-05-29T09:49:15","modified_gmt":"2026-05-29T09:49:15","slug":"spline-pto-shaft-yoke-for-agricultural-tractor","status":"publish","type":"product","link":"https:\/\/ever-powers.com\/de_at\/product\/spline-pto-shaft-yoke-for-agricultural-tractor\/","title":{"rendered":"Spline PTO Shaft Yoke for Agricultural Tractor \u2014 Factory Direct Driveline Part"},"content":{"rendered":"
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Type: Spline Bore Yoke \u00a0|\u00a0 Series: Agricultural PTO Shaft Parts \u00a0|\u00a0 Cert: CE \/ ISO 9001:2015 \u00a0|\u00a0 MOQ: 50 pcs<\/p>\n

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PTO Shaft Yoke-Product Introduction & Function<\/h2>\n

Das PTO shaft yoke i<\/strong>s a forged, spline-bore coupling component purpose-built for agricultural tractor drivelines. Its primary function is to connect the tractor’s power take-off (PTO) output stub shaft to the driveshaft assembly, transmitting rotational torque to attached implements such as rotary tillers, mowers, balers, and sprayers at standard operating speeds of 540 RPM or 1,000 RPM.<\/p>\n

The spline PTO yoke uses an internally splined bore \u2014 available in the two most widely adopted profiles \u2014 to grip the tractor output shaft without set screws or clamp bolts. This splined interface distributes torque load across all tooth flanks simultaneously, eliminating the localized stress concentration that causes rapid wear on plain-bore yokes used under high cyclic loading. The yoke ears then accept a cross-kit universal joint, allowing the connected shafts to articulate up to \u00b135\u00b0 while maintaining uninterrupted power transfer.<\/p>\n

Forged from C45 medium-carbon steel and heat-treated to 58\u201362 HRC on spline and bearing contact surfaces, these yokes are tested to ISO 500 and EN 12965 dimensional standards. CE certification is available per batch, making them compliant for import into all 27 EU member states and compatible with EN 12965:2020 safety requirements. The global PTO shaft market is on track to reach USD 1.2 billion by 2028 at a 5.3% CAGR, reflecting strong ongoing demand for precision-made agricultural PTO universal joint yoke components from both OEM and aftermarket channels.<\/p>\n

These yokes ship with phosphate-plus-oil surface treatment that passes 96-hour salt-spray testing (ISO 9227), keeping spline flanks and yoke arms corrosion-free through a full outdoor storage and transport cycle before first use.<\/p>\n

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\u00a0PTO Shaft Yoke Key Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Product Type<\/td>\nSpline PTO Shaft Yoke \u2014 Agricultural Tractor Driveline<\/td>\n<\/tr>\n
Bore Option A<\/td>\n1 3\/8\u2033 \u00d7 6-Spline (ISO 500 Type 1 \u2014 540 RPM)<\/td>\n<\/tr>\n
Bore Option B<\/td>\n1 3\/8\u2033 \u00d7 21-Spline (ISO 500 Type 2 \u2014 1,000 RPM)<\/td>\n<\/tr>\n
Material<\/td>\nC45 Forged Steel, Heat-Treated<\/td>\n<\/tr>\n
Surface Hardness<\/td>\n58\u201362 HRC on spline flanks and bearing seats<\/td>\n<\/tr>\n
Spline Tolerance<\/td>\nDIN 5480 class e8\/f7 (hobbed and shaved)<\/td>\n<\/tr>\n
Bore Concentricity<\/td>\n\u00b10.02 mm<\/td>\n<\/tr>\n
Rated Torque @ 540 RPM<\/td>\n460 N\u00b7m \/ 35 HP (Series 4 standard)<\/td>\n<\/tr>\n
Surface Finish<\/td>\nPhosphating + Oil Seal (96-hr ISO 9227 salt-spray pass)<\/td>\n<\/tr>\n
Compatible Cross-Kit<\/td>\n27 mm \u00d7 74.6 mm Series 4 (Eurocardan \/ Weasler \/ G&G)<\/td>\n<\/tr>\n
Certification<\/td>\nCE (EN 12965:2020), ISO 9001:2015<\/td>\n<\/tr>\n
MOQ \/ Lead Time<\/td>\n50 pcs \/ 7\u201315 business days standard; OEM from 200 pcs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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How to Replace Yoke on PTO Shaft<\/h2>\n

A worn spline bore, cracked yoke arm, or damaged cross-kit seat calls for immediate PTO shaft yoke replacement. Delaying repairs accelerates damage to the tractor stub shaft and implement gearbox. The procedure below covers a standard spline-bore tractor-end yoke on a Series 4 driveline. Estimated bench time: 20\u201340 minutes.<\/p>\n

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Safety Requirement \u2014 Stop Before You Start<\/p>\n

Park on level ground, engage the parking brake, shut off the engine completely, and wait for all shaft rotation to cease. Never service a live PTO shaft. If the implement is raised, support it mechanically \u2014 hydraulic pressure can drop without warning.<\/p>\n<\/div>\n

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  1. Disconnect the driveline from the tractor.<\/strong> Release the slide collar or quick-release ring on the tractor-end yoke and pull the shaft straight off the PTO stub. Lay the assembly on a clean workbench. If the spline bore has seized onto the stub shaft, do not pry \u2014 apply penetrating oil and wait 10 minutes before attempting removal.<\/li>\n
  2. Remove the four circlips.<\/strong> Using circlip pliers, extract all four retaining circlips from the yoke ears. Set them aside in a labeled container \u2014 reuse only if they show no distortion or flat spots. New circlips cost under $1 per set; worn ones cause cup ejection failures.<\/li>\n
  3. Press the bearing cups out of the yoke ears.<\/strong> Position the yoke so one cup faces upward with the opposite pair of ears resting on a vice jaw. Strike the yoke body downward with a mallet \u2014 the lower cup advances. Rotate 180\u00b0 and repeat for the remaining cup. Place each removed cup in a labeled bag with its needle bearings intact (20\u201322 needles per trunnion). Never intermix needles from different cups.<\/li>\n
  4. Disengage the cross trunnion and remove the old yoke.<\/strong> With both cups free, slide the cross trunnion clear of the damaged yoke ears. Inspect the shaft tube end for deformed splines, scoring, or raised burrs. Remove any burrs with a fine file before fitting the replacement.<\/li>\n
  5. Verify the new yoke dimensions.<\/strong> Before pressing anything together, confirm the replacement spline PTO yoke<\/strong> matches: bore size (1 3\/8\u2033), spline count (6 or 21), and cross-kit ear bore diameter (27 mm for Series 4). A mismatched yoke will fail within the first 10 hours of operation. Cross-reference against your tractor’s specification sheet or the part number on the damaged yoke.<\/li>\n
  6. Pack the new cups and install the cross-kit.<\/strong> Fill each bearing cup to 70\u201380% capacity with NLGI #2 EP grease \u2014 overfilling causes seal blow-out. Using a socket matched to the cup outer diameter, press each cup into the new yoke ear until the circlip groove is fully exposed. Install new circlips and verify they seat completely in their grooves by attempting to retract them with a flat screwdriver. Any circlip that lifts out under light force is not seated and must be re-pressed.<\/li>\n
  7. Reconnect and run a function test.<\/strong> Slide the assembled yoke onto the tractor PTO stub shaft until the collar or quick-release ring locks audibly. Raise and lower the three-point hitch through its full range to verify driveline clearance and angle. Engage the PTO at low idle (800\u20131,000 engine RPM) for 2 minutes and listen for vibration, knocking, or heat generation at the yoke area before returning to normal working speed.<\/li>\n<\/ol>\n

    Always replace the yoke and cross-kit as a matched set. Fitting a new yoke against a worn cross produces metal-to-metal contact on mismatched hardness surfaces, cutting effective service life of the new part by up to 40%.<\/p>\n

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    Applications of PTO Shaft Yoke in Agricultural Machinery<\/h2>\n

    The spline PTO shaft yoke is the starting point of every tractor-driven implement driveline. Because the 1 3\/8\u2033 \u00d7 6-spline profile is standardized across ISO 500 Type-1 tractors \u2014 representing over 80% of compact and utility tractors under 100 HP manufactured globally since 1980 \u2014 a single yoke specification covers the majority of farm equipment requiring a high torque PTO shaft yoke for farm equipment across these categories:<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Implement<\/th>\nPTO Speed<\/th>\nWhy This Yoke Fits<\/th>\n<\/tr>\n<\/thead>\n
    Rotary Tillers \/ Rotavators<\/td>\n540 RPM<\/td>\nAbsorbs soil-impact shock loads; hardened splines resist fretting in stony ground<\/td>\n<\/tr>\n
    Finish Mowers & Rotary Cutters<\/td>\n540 RPM<\/td>\nSustains 460 N\u00b7m continuous torque; low runout reduces blade vibration<\/td>\n<\/tr>\n
    Round & Square Balers<\/td>\n540\u20131,000 RPM<\/td>\n6\u201310 hr\/day continuous duty; forged body handles cyclic peak torque spikes at chamber fill<\/td>\n<\/tr>\n
    Fertilizer Spreaders & Sprayers<\/td>\n540 RPM<\/td>\nPhosphate + oil coating resists fertilizer and chemical corrosion between seasons<\/td>\n<\/tr>\n
    Post Hole Diggers<\/td>\n540 RPM<\/td>\nHandles repeated high-torque stall events (rock strike); 120,000 N\u00b7mm bending moment rating<\/td>\n<\/tr>\n
    Grain Augers & Conveyors<\/td>\n540\u20131,000 RPM<\/td>\nSmooth power transfer at sustained high speed; minimal vibration protects auger bearings<\/td>\n<\/tr>\n
    Irrigation Pumps<\/td>\n540\u20131,000 RPM<\/td>\nRuns 4\u201312 hr uninterrupted; sealed bearing cups maintain lubrication without daily re-greasing<\/td>\n<\/tr>\n
    Wood Chippers<\/td>\n540\u20131,000 RPM<\/td>\nExtreme shock tolerance; forged grain structure withstands sudden jam-stop inertia loads<\/td>\n<\/tr>\n
    Flail Mowers & Mulchers<\/td>\n540 RPM<\/td>\nDebris resistance and secure bore fit critical in high-debris mulching environments<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Across all categories, the spline interface on this PTO universal joint yoke ensures torque is transmitted through geometry, not friction \u2014 meaning connection force and wear are predictable, replaceable, and never reliant on bolt pre-load that can relax in field vibration.<\/p>\n

    \"Applications<\/p>\n

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    Maintenance and Care of Agricultural Power Take-Off (PTO) Shaft Yokes<\/h2>\n

    Correct maintenance is the single largest factor in yoke service life. Field data indicates that most premature yoke failures trace back to three causes: inadequate lubrication, operating beyond the rated articulation angle, and delayed replacement of worn cross-kits. The schedule and procedures below address all three.<\/p>\n

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    1. Lubrication Schedule<\/h2>\n