How to maintain a combine grain harvester

The maintenance of combine grain harvesters is crucial for ensuring their efficient, stable operation and extending their service life. The following is a detailed introduction to the maintenance methods of combine grain harvesters from five aspects: daily inspection, regular maintenance, seasonal maintenance, storage maintenance, and operation norms

I. Daily Inspection

Pre-work inspection

Fuel and lubricating oil: Check if the fuel tank has sufficient fuel and ensure that the fuel is free of impurities. Check the oil levels of engine oil, hydraulic oil, gear oil, etc. If they are insufficient, add them in time and pay attention to the cleanliness of the oil.

Cooling system: Check the coolant level to ensure it is within the normal range; Clean the dust and debris on the surface of the radiator to prevent blockage and affect heat dissipation.

Tires and tracks: Check if the tire pressure meets the standard and the wear condition of the tire tread. If it is a crawler harvester, check the tension of the tracks and the wear of the track plates.

Cutting table section: Check if the cutting knife is sharp, and if there are any notches or wear. Check whether the blade guard is in good condition and whether the gap between the fixed blade and the moving blade is appropriate (usually 0.2-0.4 millimeters). Clear the debris and straw on the cutting table.

Conveying and threshing system: Check whether the tension of the conveying chain and conveyor belt is appropriate, and whether there is any looseness or wear. Check whether the threshing drum, screen and other components are in good condition, and whether there is any blockage or damage.

Observation during homework

Listen for abnormal sounds: During operation, pay attention to listening for any abnormal sounds from the engine, transmission system, etc. If so, stop the machine immediately for inspection.

Observe the instrument indications: Pay attention to whether the indications of the water temperature gauge, oil pressure gauge, tachometer and other instruments are normal. If there are any abnormalities, they should be dealt with in time.

Check the quality of the operation: Observe whether the harvested grains are clean and free of loss, and whether the stubble height is consistent. If there are any abnormalities, adjust the relevant components.

Second, regular maintenance

Engine maintenance

Change the engine oil and filter: In accordance with the engine's user manual, change the engine oil and oil filter regularly, generally every 100 to 200 hours of operation.

Clean the air filter: Regularly clean or replace the air filter to prevent dust from entering the engine and affecting performance.

Check and adjust the valve clearance: Regularly check and adjust the engine valve clearance to ensure that the engine has sufficient intake air and smooth exhaust.

Maintenance of the transmission system

Inspect and replace the drive belt: Regularly check the tension of the drive belt. If it is loose, adjust it in time. When the drive belt is severely worn, it should be replaced in time.

Inspect and lubricate bearings: Regularly check the lubrication condition of each bearing in the transmission system, and add grease in time to prevent bearing wear.

Check and adjust the clutch: Regularly inspect whether the clutch disengages thoroughly and engages smoothly. If any abnormalities are found, adjust or replace the clutch plates in a timely manner.

Maintenance of hydraulic system

Check the hydraulic oil: Regularly inspect the oil level and quality of the hydraulic oil. Add oil in time when it is insufficient. Replace the oil in time when its quality deteriorates.

Clean the hydraulic filter: Regularly clean or replace the hydraulic filter to prevent impurities from entering the hydraulic system and affecting its performance.

Inspect the hydraulic pipelines: Regularly check the hydraulic pipelines for any leakage, wear or other conditions. If any are found, deal with them promptly.

Iii. Seasonal Maintenance

Maintenance before the harvest season

Comprehensive inspection and debugging: Before the harvest season, conduct a comprehensive inspection and debugging of the combine grain harvester to ensure that all components are in good condition.

Replace vulnerable parts: Replace vulnerable parts such as cutters, drive belts, and chains in advance to prevent malfunctions during operation.

Trial operation: Conduct a trial operation before the official operation to check whether the harvester runs smoothly and whether all components are working normally.

Post-harvest maintenance

Cleaning: After the harvest season, clean the combine grain harvester to remove soil, straw and other debris from the body, header, conveying system and other parts.

Rust prevention treatment: Rust prevention treatment is carried out on metal parts, such as applying anti-rust oil or spraying anti-rust paint, to prevent rusting.

Storage preparation: Park the harvester in a dry and well-ventilated indoor area and avoid storing it outdoors. Remove the battery and store it separately, and charge and maintain it regularly.

Iv. Storage and Maintenance

Preparations before long-term storage

Drain fuel and coolant: Before long-term storage, the fuel and coolant in the fuel tank and cooling system should be drained to prevent deterioration and corrosion of components

Cleaning and lubrication: Conduct a thorough cleaning of the harvester and lubricate all moving parts to prevent rust and wear.

Support and fixation: Support the harvester on a flat ground and fix it with wooden blocks or special support frames to prevent the body from deforming.

Inspection during storage

Regular start-up: During long-term storage, the engine should be started regularly to let the harvester run for a period of time to prevent rusting and aging of components.

Inspect components: Regularly check whether all components of the harvester are loose, rusted, etc. If any are found, they should be dealt with promptly.

V. Operating Procedures and Precautions

Standardized operation

Avoid overloading: Adjust the operation speed and load reasonably based on the performance of the harvester and the crop conditions to prevent component damage caused by overloading.

Smooth operation: When starting, turning, lifting or lowering the cutting table and other operations, they should be carried out smoothly to avoid sudden acceleration, sudden braking and other violent operations.

Pay attention to safety: During operation, safety should be given top priority to prevent casualties and equipment damage.

Training and Learning

Operator training: Provide professional training to operators to familiarize them with the performance, operation methods and maintenance knowledge of the harvester.

Learn new technologies: Pay attention to the development of new technologies and methods for harvesters, and constantly learn to improve operational skills and maintenance levels.