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Analysis of bearing wear in small four-wheel tractor
**Analysis of Bearing Wear in Small Four-Wheel Tractors**
Home > Bearing Knowledge > Analysis of Bearing Wear in Small Four-Wheel Tractor
Source: China Bearing Network | Date: January 9, 2014
When a small four-wheel tractor experiences difficulty in turning or fails to turn at all, it is often due to issues within the differential system. There are two main scenarios: one where the tractor can only move straight, and another where it struggles to turn properly. The primary cause in both cases is usually related to the differential planetary gear shaft becoming stuck with the planetary gears, leading to a loss of the differential function. This prevents the tractor from making smooth turns and forces it to move in a straight line.
To resolve this issue, the first step is to replace the differential planetary gear shaft, the two planetary gears, and their corresponding thrust washers. It’s also important to change the gear oil during this process. Another common problem occurs when the tractor either consistently moves straight or has trouble turning. This is often caused by poor-quality roller bearings in the steering gear assembly. Over time, these bearings may wear out significantly, causing the roller to become stuck between the worm gear and the worm. In some cases, the worm wheel and worm may even jam together, resulting in operational problems.
The solution involves disassembling the steering gear assembly, replacing the upper and lower single-row radial ball bearings, and thoroughly cleaning all components. It's recommended to apply calcium-based grease to the head. When replacing bearings, it's essential to carefully inspect them for any signs of damage, such as cracks or deformities. Regular maintenance and checking of the bearing’s axial clearance are crucial to prevent excessive play, which can lead to severe wear and mechanical failure.
Proper maintenance not only extends the life of the bearings but also ensures smoother operation and better performance of the tractor. Always follow manufacturer guidelines and perform routine checks to keep your equipment running efficiently.
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This article was originally published on China Bearing Network. For more information, visit [http://www.chinabearing.net](http://www.chinabearing.net).
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