{"id":1464,"date":"2026-08-26T03:27:33","date_gmt":"2026-08-26T03:27:33","guid":{"rendered":"https:\/\/ever-powers.com\/?post_type=product&p=1464"},"modified":"2026-08-26T03:48:45","modified_gmt":"2026-08-26T03:48:45","slug":"yd40-270-header-cylinder-long-stroke","status":"publish","type":"product","link":"https:\/\/ever-powers.com\/de\/product\/yd40-270-header-cylinder-long-stroke\/","title":{"rendered":"YD40-270 Header Cylinder | 896mm Mounting Length, 45mm Bore, 270mm Stroke"},"content":{"rendered":"

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\"YD40-270<\/div>\n
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Model: YD40-270<\/p>\n

YD40-270 Header Cylinder \u2014 Long-Stroke Combine Platform<\/h2>\n

The YD40-270 header cylinder<\/strong> stands apart from other combine header actuators in this lineup by one defining dimension: a 896 mm closed mounting length. This is not a compact positioning cylinder \u2014 it is a structural hydraulic actuator designed for combine platforms with extended header geometry, where the lift linkage requires a long cylinder to span the distance between the chassis mounting point and the header pivot arm.<\/p>\n

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Key Specifications<\/p>\n

Bore Diameter<\/span>45 mm<\/span>
\nRod Diameter<\/span>40 mm<\/span>
\nStroke<\/span>270 mm<\/span>
\nMounting Length<\/span>896 mm<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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YD40-270 Header Cylinder 896mm Mounting Length: Why This Dimension Defines the Application<\/h2>\n

A 896 mm pin-centre closed length is the most distinctive feature of the YD40-270, and it immediately constrains the machine platforms this cylinder is compatible with. Most combine header lift cylinders in the mid-range agricultural market have closed lengths in the 380\u2013520 mm range. The YD40-270’s 896 mm mounting length places it in a category designed for larger or differently configured machines \u2014 typically combines with elevated header pivot points, extended lift arm geometry, or designs where the cylinder mounts low on the chassis and extends upward to a high-mounted header pivot.<\/p>\n

This long mounting configuration has real mechanical implications. A cylinder with 896 mm closed length and only 270 mm stroke is operating with a high body-to-stroke ratio \u2014 the cylinder body is long relative to its active travel. This design keeps the cylinder operating within a moderate extension ratio across its stroke range, which is beneficial for rod stability: at any point in the stroke, the exposed (unsupported) rod length remains within safe column buckling limits for the 40 mm rod diameter specified.<\/p>\n

The 40\/45 rod-to-bore ratio (89%) on the YD40-270 is among the highest in this product range. A near-full-bore rod generates nearly symmetric push and pull forces, which matters in long-body cylinder applications where both extension and retraction loads can be substantial due to the weight distribution of the header and the changing mechanical advantage of the lift linkage across the stroke.<\/p>\n

At 150 bar system pressure and 45 mm bore, the YD40-270 delivers approximately 23.8 kN push force \u2014 a moderate figure that reflects the fact that this cylinder is sized for a specific machine geometry, not for maximum force output. The lift linkage mechanical advantage does the amplifying work; the cylinder delivers the input force at the right travel distance.<\/p>\n

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\"Combine<\/p>\n

The YD40-270’s 896 mm body spans extended header lift linkage geometries common on larger combine platforms.<\/p>\n<\/div>\n

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Long Stroke Combine Header Cylinder Replacement: Verification Steps Before Ordering<\/h2>\n

Because the YD40-270 has a closed length approximately 85% greater than a standard compact header cylinder, sourcing errors \u2014 ordering the wrong variant \u2014 are more consequential. A mismatched closed length on a long-body cylinder cannot be corrected with spacer brackets without fundamentally altering the lift linkage geometry. We strongly recommend a three-point verification process before placing orders for this model:<\/p>\n