Preparing the combine for the harvest season: the complete checklist

Preparing the Combine for the Harvest Season: The Complete Checklist

The harvest season in Hungary is the highlight of the year for every farmer, harvesting the fruits of the invested labor. However, in order for this critical period to pass smoothly and as efficiently as possible, thorough and professional preparation of the combine harvester is essential. A well-maintained machine not only increases productivity but also prevents costly breakdowns, ensures the quality of the harvested crop, and most importantly, guarantees safe operation. In this article, we present a detailed checklist that guides you step-by-step through every important stage of preparing the combine for harvest.

Why is Careful Preparation Vital?

Combine maintenance is not a luxury, but an investment. A neglected machine:

• Can cause costly downtimes: A breakdown during harvest is painful not only because of repair costs but also because of lost time and deterioration of crop quality.
• Reduces efficiency: A machine that is poorly adjusted or operating with worn parts works slower, consumes more fuel, and causes greater grain loss.
• Impairs crop quality: Poor threshing mechanism settings, worn rasp bars, or improperly functioning sieves can lead to damaged grains and contaminated crops.
• Represents a safety risk: Worn belts, chains, faulty brakes, or lighting can lead to serious accidents.
• Shortens machine lifespan: Lack of regular maintenance significantly reduces the combine's lifespan and value.

First Steps of Preparation: General Inspection

Documentation and Tools

• Operator's Manual: Keep the machine's operator's manual and parts catalog at hand. These provide invaluable help for settings and troubleshooting.
• Service Book: Check the dates of previous maintenance and record current tasks.
• Tools: Make sure all necessary tools (wrenches, grease gun, cleaning tools) are at hand and in good condition.

General Cleaning and Visual Inspection

Before touching any parts, clean the combine thoroughly. Remove dust, old crop residues, and other contaminants. This is not just an aesthetic issue, but helps discover hidden damage, cracks, or leaks. Use compressed air for hard-to-reach places.

Checking the Header and the Feeder Chain

The header is the first and one of the most important elements of harvesting. Its flawless operation is essential for minimal grain loss and efficient work.

Header

• Guards and Knives: Check all guards and the sharpness and integrity of the cutting knives. Worn or damaged knives tear the stalks, worsen cutting quality, and increase grain loss. Replace damaged parts.
• Sickle Drive: Inspect the pulleys, belts, or chains of the sickle drive. Check tension and wear.
• Reel: Check the integrity and correct adjustment of the reel fingers. Make sure the reel bearings are not faulty and the hydraulic system works flawlessly.
• Spacers and Sensors: Check the header's ground-following sensors and spacers.

Feeder Chain

• Chain and Slats: Inspect the tension of the feeder chain and the condition of the slats. Worn or broken slats can cause problems in the material flow.
• Bearings: Check the feeder bearings and grease them.
• Stone Trap: Clean out the stone trap trough and check if the stone catching mechanism is functional.

The Threshing and Separation Mechanism: The Heart of the Combine

This part is responsible for extracting the seeds and separating them from the straw. Precise adjustment is key here.

Threshing Drum and Concave

• Rasp Bars: Check the threshing drum rasp bars for wear and integrity. Worn rasp bars reduce threshing efficiency and increase grain breakage.
• Concave: Inspect the concave grates and lamellas. Make sure they are not clogged or damaged.
• Gaps: Adjust the gaps between the threshing drum and the concave according to the manufacturer's instructions, depending on the type of crop to be harvested.
• Bearings and Drive: Check the threshing drum bearings and drive belt tension.

Straw Walkers/Rotors

• Straw Walker Boxes: Thoroughly clean the straw walker boxes and grates. Remove blockages and stuck pieces of straw. Check for damage.
• For Rotor Machines: Inspect the condition and wear of the rotor blades and the cleanliness of the rotor housing.

Cleaning Mechanism and Grain Tank

To achieve clean and quality crops, the flawless operation of the cleaning mechanism is essential.

Sieves and Fan

• Upper and Lower Sieves: Thoroughly clean all sieves. Check that they are not deformed, clogged, or damaged.
• Sieve Adjustment Mechanism: Make sure the sieve adjustment mechanism works easily and accurately.
• Fan: Clean the fan blades from accumulated dirt. Check the tension and condition of the fan drive belt.
• Cross Auger: Clean the cross auger and check the rubber paddles.

Grain Elevators and Grain Tank

• Elevator Chains and Paddles: Check the tension of the grain elevator chains and the wear of the paddles. Worn paddles reduce transport efficiency.
• Grain Tank: Clean the grain tank thoroughly of old crop residues.
• Unloading Auger: Inspect the unloading auger flighting and its drive. Make sure unloading is smooth.

Drive System and Chassis

The systems responsible for keeping the combine in motion and for power transmission also require special attention.

Belts and Chains

• Tension and Wear: Check the tension, wear, and cracks of all drive belts and chains. Replace suspicious or excessively worn parts.
• Adjustments: Make sure belt tensioners and chain tensioners are working properly and are correctly adjusted.

Bearings and Lubrication

• Lubrication Points: Grease all lubrication points according to the manufacturer's instructions. Don't skimp on grease!
• Bearings: Check all bearings (wheel bearings, axle bearings, etc.) for abnormal noises, looseness, or signs of overheating. Replace damaged bearings.

Tires and Brakes

• Tires: Check tire pressure, condition, cracks, and damage. Proper pressure is crucial for stability and traction.
• Brakes: Test the operation of the brakes. Make sure they apply evenly and the parking brake works too.

Hydraulics, Electrical System, and Cab

For the comfortable and safe operation of modern combines, the flawless condition of these systems is essential.

Hydraulics

• Oil Level: Check the hydraulic oil level and condition. If necessary, top up or change the oil and the filter.
• Leaks: Inspect all hydraulic hoses, connections, and cylinders for leaks.

Electrical System

• Cables and Connectors: Check all electrical cables and connectors for damage, corrosion, or looseness.
• Lighting and Signals: Test all lighting fixtures (headlights, work lights, turn signals, tail lights) and the horn.
• Battery: Check the battery charge and the cleanliness of the terminals.
• Sensors and Monitors: Make sure all sensors and monitors in the cab (e.g., grain loss monitor, tachometer) are functional.

Cab

• Cleanliness and Comfort: Clean the cab. Check the condition of the seat, steering wheel, and controls.
• AC and Ventilation: Test the air conditioning and heating. Replace pollen filters.
• Safety Equipment: Make sure the fire extinguisher is charged and in an accessible place.

Engine and Cooling

The heart of the combine is the engine, whose reliable operation is critical.

• Oil Change and Filters: Perform the oil change and replace the oil filter, fuel filters, and air filter.
• Cooling System: Clean the radiator cores from dust and plant residues. Check the coolant level and antifreeze protection.
• Fuel System: Check the fuel lines for leaks.

Agrider's Tip: Don't Forget the Test Run!

After completing the full combine service checklist, do not head out to the field immediately! Perform a thorough test run at idle, and then for a short stretch at the edge of the field. Listen for any abnormal noise, vibration, leak, or error signal. This is the last chance for fine-tuning and eliminating potential problems before the real harvest preparation begins.

Summary

Careful preparation of the combine for the harvest season is not just a burden, but an investment that pays off in the form of reliable operation, higher productivity, and better crop quality. The detailed checklist compiled by the Agrider Knowledge Base helps you keep your combine in optimal condition for the trials of harvesting. Remember, prevention is always cheaper than repair! We wish you much success and a bountiful harvest for the upcoming season!