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Series 36
1-3/8″ 6-Spline (540 rpm)
36×89 mm Cross Kit
Interfering Clamp Bolt
High Vibration Rated
CE Certified
MOQ 1 pc — LGPD Ready
Series 36 Z6 Clamp Bolt PTO Yoke — Compatible Shaft Series
| Compatible Shaft | Series Type | Cross Kit | HP Range |
|---|---|---|---|
| S36 | S Series (Star) | 36×89 mm | 70–100 hp |
Overview
Product Description
Series 36 Clamp Bolt Splined Yoke provides the interfering clamp bolt connection at the 36×89 mm cross-kit class — a European OEM specification used on specific disc mower and mower-conditioner driveline assemblies in the 70–100 hp class. The Series 36 clamp bolt yoke is the permanent-mount counterpart to the Series 36 quick release yoke, sharing the same 36×89 mm cross-kit dimensions.
Series 36 is specified where the 30.2 mm family (Series 6/7) is at its torque limit and the 35 mm family (Series 8) tube OD is too large for the implement housing. The 36 mm pin diameter is the European OEM transitional specification that fills this gap. Series 36 clamp bolt yokes with Z20 spline (1-3/4 inch, 20-spline) are also available for 1,000 rpm applications in this torque class.
Series 36 is a lower-volume OEM specification series. Confirm availability before committing to a delivery schedule. For OEM contract supply, contact Ever-Power Drive Line with implement details and annual volume.
Clamp Bolt Locking Mechanism — Installation Procedure
The interfering clamp bolt bites into the spline bore wall when tightened, creating a mechanically locked connection independent of any spring element.
Clean and Align
Clean the spline bore and PTO stub. Align the yoke spline bore with the stub splines. Slide the yoke fully onto the stub until it is completely seated — no gap between yoke face and stub shoulder.
Insert and Hand-Tighten Bolt
Insert the clamp bolt through the yoke clamp collar. Hand-tighten until the bolt contacts the spline bore wall. Do not use impact tools at this stage — the bolt must be guided in straight.
Torque to Specification
Use a calibrated torque wrench. Tighten to 25–30 Nm for Series 1–5; 35–45 Nm for Series 6–8. Inspect and retorque at first 10 hours, then every 50 hours in high-vibration duty.
⚠ Clamp Bolt vs Quick Release — Choose the Right Locking Type
Clamp bolt: Use when the yoke remains connected for the season — OEM factory-fit, high-vibration implements, applications where removal requires tools by design. Quick release: Use when daily connect/disconnect is required. The cross-kit and dimensional specifications are identical between both variants at Series 36.
Dimensional Drawing — A / B / C / D Reference
A = Overall length | B = Cross pin diameter | C = Yoke width | D = Bore diameter. Refer to the compatibility table above for exact mm values.
End-face view of the 1-3/8″ Z6 bore (6-spline). Count the splines to confirm specification before ordering.
Cross-Reference Part Numbers
| Brand / Standard | Part Number / Reference | Notes |
|---|---|---|
| Weasler (North American) | 103-3606 | Clamp bolt / interfering bolt, B suffix |
| Sparex / Eurocardan (European) | S.7537 | Interfering clamp bolt, Series 36 Z6 |
| Bondioli & Pavesi (Italian) | 6.05.36 | AB36/A36 catalog reference |
| Ever-Power Drive Line (This product) | EPG-YK-CB-36-Z6 | EPG Series 36 CB Z6 |
Spline Profile Reference
Left: Z6 (6-spline, 540 rpm) — Centre: Z21 (21-spline, European) — Right: Z20 (20-spline, 1,000 rpm)
Key Features
Interfering Clamp Bolt Lock
The bolt threads into the yoke clamp collar and bites into the spline bore wall when tightened, creating a mechanically interlocked connection. Unlike a spring-loaded push-pin, the clamp bolt connection does not depend on any spring element — there is no spring to fatigue, no collar to wear, and no retention pin to lose in field conditions.
High Vibration Resistance
The bolt-secured connection maintains its clamping force under sustained vibration loads that cycle a push-pin spring mechanism. Specified for rotary cutters, forage harvesters, and high-duty-cycle implements where vibration fatigue is a concern over 300+ hour operating seasons. Retorque inspection at 50-hour intervals ensures sustained clamping force.
1-3/8″ Z6 Spline Bore
Standard 540 rpm agricultural interface — fits all Z6 PTO stubs worldwide. Induction-hardened spline bore for long-term engagement durability.
36×89 mm Cross-Kit Seat
Precision-machined cross-kit bearing cup bores hardened to accept 36 mm pin diameter needle-roller cross-kit cups. Cross kit (code 36.01) is shared with the Quick Release version at Series 36 — one part number covers both variants.
20CrMnTi Forged Steel Body
Drop-forged chromium-manganese-titanium alloy steel yoke body, normalised and induction-hardened at the bearing seat bores. Phosphate surface coating provides corrosion resistance in outdoor agricultural conditions. Clamp bolt collar is machined integral with the yoke body — no separate clamp ring to lose or misalign.
CE Certified — LGPD Ready
CE Declaration of Conformity and ISO 9001:2015 documentation included with every shipment. LGPD data handling compliance for Brazil import submissions. SGS third-party inspection available for contract orders.
Typical Applications
Series 36 CB Z6 — permanent-mount tractor-end connection for 70–100 hp implements
Disc Mower — 36 mm OEM Spec
Series 36 clamp bolt is factory-fitted on specific disc mower drivelines where the 36×89 mm bore is the OEM specification for permanent implement-end connection.
Heavy Mower-Conditioner — 70–100 hp
Large mower-conditioner tractor-end connections at Series 36 torque class where the clamp bolt provides permanent connection for extended seasonal mowing campaigns.
European OEM Transitional Series
Series 36 clamp bolt replaces Series 36 QR yokes on permanent-mount European OEM implement drivelines requiring the 36 mm bore diameter.
Installation Steps
Verify Series and Spline
Confirm your PTO shaft is Series 36 (36×89 mm cross kit) and your tractor PTO stub is Z6 (1-3/8″ 6-spline). Count the splines to confirm.
Clean Stub and Bore
Remove all rust, debris, and old lubricant from both the PTO stub and the yoke spline bore. Clean mating surfaces ensure maximum contact area and correct bolt seating.
Slide and Seat Yoke
Align splines and push the yoke fully onto the stub until the yoke face contacts the stub shoulder. Full seating is essential before bolt tightening — a partially seated yoke will not lock correctly.
Torque the Clamp Bolt
Insert the clamp bolt and tighten with a calibrated torque wrench to 25–30 Nm (Series 1–5) or 35–45 Nm (Series 6–8). Do not use impact tools. Verify bolt is fully threaded before torquing.
Anchor Shield and Inspect
Connect the shaft safety shield chains to non-rotating points on tractor and implement. Inspect the bolt after the first 10 hours of operation and retorque to specification. Reinspect every 50 hours in high-vibration duty.
Frequently Asked Questions
- —Use clamp bolt when the yoke will remain connected for an entire season or longer — it does not require daily disconnection
- —Use clamp bolt for high-vibration applications where push-pin spring fatigue is a concern
- —Use clamp bolt for OEM factory-fit applications where removal requires a wrench by design
- —Use quick release when the yoke is connected and disconnected frequently — daily implement changes
- —Series 36 cross kit: 36×89 mm, code 36.01
- —Identical to the Series 36 Quick Release yoke — one cross kit covers both variants
- —Available from the Cross Kit product page
- —Standard bolt torque: 25–30 Nm for series 1–5; 35–45 Nm for series 6–8
- —Always torque to specification — under-torqued bolts allow yoke movement; over-torqued bolts can crack the yoke body
- —Inspect and retorque at 50-hour intervals for high-vibration applications
- —Yes — Series 36 clamp bolt fits the same shaft assemblies: S36
- —The cross-kit seat dimensions are identical between QR and CB variants at the same series
- —The spline bore profile is also identical — the difference is only in the locking mechanism
- —Italian series (Bondioli & Pavesi): see Cross-Reference table above
- —Sparex and Eurocardan part numbers also listed in the Cross-Reference section
- —The ‘Interfering Bolt’ terminology in European catalogs refers to the same product as ‘Clamp Bolt’ in North American terminology
Customer Reviews
Marco S.
Mato Grosso, Brazil — Agricultural Contractor
★★★★★
- Series 36 clamp bolt fitted as standard on our driveline assembly — no push-pin wear after full season
- CE documentation complete — straightforward import compliance
- Consistent dimensions across batches — no fitment issues
Helena R.
Montevideo, Uruguay — Parts Distributor
★★★★★
- Series 36 CB stocked alongside QR — sells as OEM replacement for European implements
- Interfering bolt references (Italian AB series) match exactly
- Lead time within 9 days for stock orders
Shipping and Order Information
MOQ
1 pc from stock
50 pcs custom / OEM
Lead Time
7–10 days (stock)
20–30 days (OEM)
Shipping
Sea / Air to Brazil
South America
Trade Terms
FOB Ningbo
CIF Santos available
ใบรับรอง
CE Certified
ISO 9001:2015
TS/16949
SGS InspectionLGPD Compliant
