Sunflower Header: How to Prepare for Harvest and Avoid Losses

Sunflower is one of the most demanding crops when it comes to header adjustment. Overdried heads shed seed at the slightest impact, and an improperly set header leaves a noticeable share of the harvest in the field. Here's how to prepare a sunflower header for the start of harvest to minimize losses.

Why Pre-Harvest Prep Matters Especially for Sunflower

Unlike cereal crops, sunflower sheds seed much more easily due to the head's structure and how brittle the seeds become at technical maturity. A header left unchecked since last season will almost certainly produce elevated losses in the very first days of operation - and once the operator notices the problem and adjusts in the field, that lost harvest is gone for good.

Checking the Cutting Mechanism and Head Dividers

Before heading into the field, be sure to check the condition of the dividers (paddles) that guide the heads toward the threshing mechanism. Dull or deformed dividers don't grip the heads cleanly - they break them apart, causing seed loss before the material even reaches the combine. Damaged components should be replaced in advance, rather than hoping they'll last one more season.

Adjusting Reel Speed

Reel speed needs to be matched to the combine's ground speed - a mismatch either knocks seed out of the heads with the reel bats, or fails to feed part of the plants into the header. The optimal ratio is fine-tuned by trial in the first hours of operation on a given field, since stand density and height vary from season to season.

Adjusting for Head Moisture and Ripeness

Sunflower moisture at harvest time significantly affects how the seed behaves in the header:

Overdried heads (below optimal moisture): maximum risk of seed shedding on contact with working components. It's worth reducing reel speed and operating more carefully, especially in areas with uneven ripening.

Underripe or wet heads: threshing becomes harder, load on the combine's threshing mechanism increases, and sieves may clog with wet material.

Checking Hydraulics and Fasteners Before the Season

The header connects to the combine through the hydraulic system, so before harvest starts it's worth checking the condition of seals and hoses - a pressure leak at the busiest point of the season means downtime exactly when every hour counts.

Pre-Field Preparation Checklist

1. Check and, if needed, replace the dividers and reel bats.
2. Inspect hydraulic hoses and fittings for leaks.
3. Check the header's mounting to the combine for play.
4. Run a test pass on a small section and adjust reel speed for the specific field conditions.
5. Repeat the settings check several times throughout the day, since head moisture changes from morning to midday.

Preparing a sunflower header isn't a pre-season formality - it's a specific set of checks that directly affect how much grain ends up in the tank. Careful attention to the dividers, reel speed, and hydraulic condition pays off in reduced losses from day one of harvest.

Need help preparing your equipment for the season or sourcing spare parts? Get in touch with the Agris Group team - we'll help you get your header ready for harvest.