Introduction
Rice-Harvesting combine harvesters are an agricultural machinery used for the cutting, harvesting and cleaning of harvested fields all over the world. The machinery plays a crucial role in the food production industry, increasing yield rates and decreasing labor requirements. To ensure the machinery operates in the most efficient and safe manner, any mechanical problems that occur with the equipment should be taken care of promptly.
The hydraulic system of a combine harvester is responsible for moving the arms, activating the cutting blade and driving the harvesting activity. Due to the complexity of the system, several failure scenarios can occur. This article offers advice on addressing and resolving the most common problems associated with the hydraulic system of a combine harvester.
Common hydraulic mechanism problems
1. Low pressure
The hydraulic pressure supplied to and generated by a combine harvester is crucial to its operation and hence its productivity. Low hydraulic pressure can be a result of an air lock in the lines, a filter blockage or a faulty pressure relief valve. To fix a low pressure problem, first ensure the filter is clear of debris, and then check the pressure relief valve for any leaks or cracks in its housing.
2. Leaks
Leaks in the hydraulic system of a combine harvester can be caused by several factors, including loose or cracked seals, broken or corroded gaskets, or worn out O-rings. If a significant amount of hydraulic fluid is leaking from the system, or if a steady stream of air is detected coming from a line, the best course of action is to inspect the unit for any loose seals or gaskets, and then rejuvenate the lines and their respective fittings with a quality, pressure-rated silicone sealant.
3. Overheating
Overheating is another common issue experienced in the system of a combine harvester. This usually occurs due to the inappropriate choice of hydraulic fluid, or due to blockages in the hydraulic lines caused by impurities or foreign objects. To diagnose the problem, the hydraulic lines should be inspected for any contamination, debris, or blockages. Also, the performance of the hydraulic system should be monitored to check for pressure surges that could be causing the overheating. If diagnosed and detected, the problem should be rectified accordingly.
4. Spongy feeling
A spongy feeling in the hydraulic system often occurs due to air pockets or cavities forming in the lines. It is important to identify if the air pockets are due to insufficient fluid levels, or from inadequate flow rates or ineffective seals. Once the source of the air pockets has been identified, the appropriate measures can be taken to address the issue.
Conclusion:
A combine harvester is a complex piece of machinery that requires appropriate maintenance to ensure it remains in its optimal condition. To ensure the highest efficiency and the safest working environment, any mechanical failures experienced in the harvester should be promptly addressed and rectified. The above common problems associated with the hydraulic system of a combine harvester can be easily diagnosed and addressed. If they are ignored, they can cause serious impairments and efficiency losses to the harvester.
