Corn Combine Harvester Hydraulic Cylinder RFQ Checklist

An accurate corn combine harvester hydraulic cylinder quotation begins with the cylinder function, machine geometry and harvesting duty. Header, steering, unloading and auxiliary cylinders can have different interfaces and loads, so an RFQ should contain one controlled data set for each cylinder rather than one general request for the whole harvester.

Identify the Harvester and Cylinder Function

Provide the harvester make, model, production year and row configuration when known. State whether the cylinder serves the corn-picking header, grain-bin or unloading system, straw-handling device, steering or another auxiliary function. Clarify whether the requirement is an OEM design, a replacement part or an equipment modification.

Dimensional Data Required

• Bore and piston-rod diameter with units and drawing tolerances.
• Stroke, retracted length, extended length and pin-to-pin dimensions.
• Base and rod-end mounting type, pin diameter, mounting width and orientation.
• Port thread, position and fitting direction.
• Available installation envelope and hose-clearance limits.
• Drawing number, revision and requested quantity for each function.

Operating Conditions to Specify

Record normal and peak system pressure, push and pull load, movement speed, cycle frequency and any load-holding requirement. Include machine linkage geometry and the cylinder position through the operating cycle. For harvest equipment, describe vibration, shock, crop-residue exposure and the possibility of side loading or impact.

Verified Product-Family Information

Product family	Corn combine harvester hydraulic cylinders
Application	Agricultural corn harvesting machinery
Construction description	High-strength cylinder tube and wear-resistant piston rod
Environmental features	Dust-proof and anti-crop-straw sealing components
Customization	OEM and ODM according to customer drawings
Inspection	Pressure testing before delivery
Dimensions and pressure	Multiple configurations — confirm from the target application

The product-library record does not define one fixed bore, rod, stroke or working pressure for all corn harvester cylinders. A buyer should not combine values from different models or borrow data from another agricultural product. Final feasibility requires the actual drawing, interface and duty information.

Dust, Straw and Field-Duty Information

Explain how the cylinder is exposed to dust, mud, crop residue, rain, washdown and outdoor storage. Note the expected operating season, hours per day and cleaning method. Provide the hydraulic-fluid specification and any known contamination-control requirements. These inputs help the supplier evaluate the real environment instead of assuming a generic farm duty.

Replacement Cylinder Evidence

1. Start with the original drawing, part number and machine manual where available.
2. Safely isolate and depressurize the equipment before measurement.
3. Photograph the installed orientation, both ends, ports and nearby structure.
4. Measure every interface and note wear, bending, leakage or impact damage separately.
5. Confirm the actual function, pressure, load and motion with the operator or equipment owner.

Purchasing and Acceptance Requirements

• Prototype and production quantities.
• Destination, requested delivery date and seasonal deadline.
• Drawing approval and sample-fit procedure.
• Required inspection and pressure-test documentation.
• Marking, packing and corrosion-protection requirements.

Common RFQ Problems

Requesting one cylinder for every machine function

A header-lift cylinder and a steering cylinder do not share the same purpose or geometry. Identify each function and submit separate data.

Providing only bore and stroke

Those dimensions do not define mounting, closed length, ports, load direction or duty. Include a complete interface drawing.

Ignoring residue and contamination

Harvesting conditions are part of the specification. State the actual exposure instead of assuming that all agricultural cylinders face identical conditions.

FAQ

Can the cylinder be produced from a customer drawing?

Yes. The verified product record states that OEM and ODM customization is available according to customer drawings.

Should unknown specifications be estimated?

No. Mark unknown fields clearly and send the available machine, function and measurement evidence for engineering review.

Explore the Zhenqiang hydraulic cylinder range and review the verified corn combine harvester cylinder page before completing the RFQ.