Description
Series 5
1-3/8″ 21-Spline (European)
30.2×80 mm Cross Kit
Quick Release Push-Pin
20CrMnTi Forged Steel
CE Certified
MOQ 1 pc — LGPD Ready
Series 5 Z21 Quick Release PTO Yoke — Compatible Shaft Series
| Compatible Shaft | Series Type | Cross Kit | HP Range |
|---|---|---|---|
| T5 | T Series (Triangular) | 30.2×80 mm | 35–55 hp |
| L5 | L Series (Lemon) | 30.2×80 mm | 35–55 hp |
| G5 | G Series (Wide Angle CV) | 30.2×80 mm | 35–55 hp |
Overview
Product Description
Series 5 Z21 is the European-standard tractor-end yoke for 35–55 hp tractors with 1-3/8″ 21-spline PTO stubs. Found on specific European tractor models — primarily older SAME, Lamborghini, and some Deutz-Fahr models — the Z21 21-spline stub requires this specific yoke. The cross-kit seat (30.2×80 mm) is identical to Series 5 Z6, allowing cross-kit interchangeability between Z6 and Z21 yokes at Series 5.
The 1-3/8″ 21-spline bore is identified by counting 21 ridges on the yoke bore interior. Measuring the bore outer diameter (34.9 mm) alone will not distinguish Z21 from Z6 — both share the same outer diameter. Counting the splines is the definitive identification method. The Z21 stub on the tractor produces a tighter, smoother spline engagement than the Z6 due to the higher spline count.
For tractors with Z21 PTO stubs, the Z21 yoke is the only correct tractor-end component. Using a Z6 yoke on a Z21 stub produces an incomplete spline engagement — the yoke will appear to fit but will be retained only on a fraction of the available spline contact area, causing rapid spline wear and eventual yoke slippage under load. Always identify the stub correctly before ordering. Contact Ever-Power Drive Line for confirmation.
Quick Release Mechanism — How It Works
The push-pin spring-loads into the PTO stub engagement groove. Press the collar to release.
Push Collar Forward
Press the spring-loaded collar toward the yoke body. This retracts the push-pin from its engagement position, freeing the bore to slide onto the PTO stub.
Slide Yoke Onto Stub
With collar held forward, push the splined bore fully onto the PTO stub until the yoke is fully seated. The splines must be fully engaged before releasing the collar.
Release — Click Confirms Lock
Release the collar. The spring drives the push-pin into the stub engagement groove. An audible click and positive resistance to withdrawal confirms correct locking.
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″ Z21 spline bore (21-spline). Count the splines to confirm the correct specification before ordering.
Cross-Reference Part Numbers
| Brand / Standard | Part Number / Reference | Series Designation |
|---|---|---|
| Weasler (North American) | 102-0521 | NA Series 5 |
| Sparex / Eurocardan (European) | S.6119 | Italian Series / Z21 |
| Bondioli & Pavesi (Italian) | AB5/A5 | Italian catalog ref |
| Ever-Power Drive Line (This product) | EPG-YK-QR-5-Z21 | EPG Series 5 Z21 |
Spline Profile Reference
Left: Z6 (6-spline, 540 rpm) — Centre: Z21 (21-spline, European) — Right: Z20 (20-spline, 1,000 rpm)
Key Features
Push-Pin Quick Release
Spring-loaded push-pin mechanism allows tool-free connection and disconnection from the PTO stub. Press the collar to retract the pin; release to engage. An audible click confirms positive locking. One-handed operation in field conditions.
1-3/8″ Z21 Spline Bore
European 21-spline interface for legacy tractor models specifying Z21 stub. The bore is induction-hardened for resistance to spline wear during frequent engagement and release cycles.
30.2×80 mm Cross-Kit Seat
Precision-machined cross-kit bearing cup bores hardened to accept 30 mm pin diameter needle-roller cross-kit cups. Compatible with Series 5 cross kits used across T5 / L5 / G5 drive shaft assemblies.
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. Designed for long-term field service life.
Retention Spring and Collar
Heavy-duty retention spring loaded in the push-pin bore maintains positive engagement under PTO operating vibration. The collar provides a reliable surface for one-handed release in field gloves. Spring tension is calibrated for the series torque class.
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 5 Z21 yoke — tractor-end connection for 35–55 hp implements
Round Balers — 35–55 hp
Series 5 Z6 is the tractor-end yoke for round balers and large square balers on 35–55 hp tractors. The 30.2×80 mm cross-kit seat transmits the higher continuous and peak torque of baling applications reliably through the push-pin connection.
Rotary Mowers — 1.8–2.4 m
Large rotary mowers on 40–55 hp tractors. Series 5 Z6 handles the higher blade disc inertia of wider mowers and allows quick disconnection when the mower is in transport or for blade maintenance.
Irrigation Pump Drives
Tractor-end connection for PTO-driven centrifugal irrigation pumps on 35–55 hp tractors. Continuous duty application — Series 5 Z6 provides the cross-kit capacity for extended pumping seasons without yoke fatigue.
Installation Procedure
Verify Series and Spline
Confirm your PTO shaft is Series 5 (30.2×80 mm cross kit) and your tractor PTO stub is Z21 (1-3/8″ 21-spline). Count the splines if in doubt.
Clean the Stub
Remove any rust, debris, or old lubricant from the tractor PTO stub and the yoke spline bore before installation. A clean, dry spline surface ensures maximum contact area and positive push-pin engagement.
Press Collar and Engage
Press the collar toward the yoke body to retract the push-pin. Align the yoke spline bore with the stub splines and push firmly until the yoke is fully seated on the stub.
Release and Verify Click
Release the collar. You should hear and feel the push-pin snap into the stub engagement groove. Tug the yoke firmly — it must not slide back without pressing the collar.
Anchor Safety Chain
After the shaft is fully connected (both ends), anchor the safety shield chains to fixed, non-rotating points on the tractor and implement. Never operate without safety chains secured.
Frequently Asked Questions
- —Count the spline ridges on the PTO stub: 6 ridges = Z6; 21 ridges = Z21
- —Both stubs have the same outer diameter (1-3/8″ / 34.9 mm) — measuring diameter alone does not distinguish them
- —Z21 stubs are found on older European tractor brands: SAME, Lamborghini, some Deutz-Fahr models
- —Check the tractor operator manual under ‘PTO specifications’ for definitive confirmation
- —No — Z6 and Z21 have different spline counts and bore profiles; they are not interchangeable at the tractor stub
- —Z6 on a Z21 stub (or vice versa) produces incomplete spline engagement and rapid wear
- —The cross-kit seat is identical between Z6 and Z21 at this series — only the bore differs
- —Series 5 cross kit: 30.2×80 mm, code 5.01
- —The cross kit is identical to the Series 5 Z6 yoke — fully interchangeable
- —Available individually from the Cross Kit product page
- —The Z21 stub is found primarily on older European tractors that were imported to Brazil
- —Current production tractors (John Deere, Massey Ferguson, New Holland, Valtra) in Brazil use Z6 stubs at 540 rpm
- —Check the tractor PTO stub before assuming Z6 — Z21 stubs on legacy fleet equipment are still in active service
- —The cross kit, push pin, and retention spring are identical between Z6 and Z21 at the same series
- —The yoke body must be the correct spline (Z6 or Z21) — bodies are not interchangeable
- —Order Z21 yoke bodies and Z6 yoke bodies as separate SKUs; cross kits can be shared
Customer Reviews
André F.
Rio Grande do Sul, Brazil — European Implement Importer
★★★★★
- Series 5 Z21 is the correct yoke for our SAME tractor fleet — confirmed fit on first order
- Z21 bore engagement is smooth and positive — different feel from Z6 but same push-pin operation
- CE documentation complete for our import compliance records
Lucia M.
Montevideo, Uruguay — Tractor Parts Dealer
★★★★★
- Series 5 Z21 stocked for our European tractor service customers — consistent seller
- Cross-kit interchangeability with Z6 at same series simplifies our spare parts inventory
- 10-day lead time from Ever-Power Drive Line — within our restocking window
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
Certifications
CE Certified
ISO 9001:2015
TS/16949
SGS InspectionLGPD Compliant
