The tractor is divided into walking type (wheel type) and crawler type (also called chain type). In actual operation, due to various reasons, the two tractors will have different degrees of automatic deviation phenomenon. 1. Reasons for the automatic deviation of the wheeled tractor When the steering wheel is moved forward under normal circumstances, the tractor automatically or suddenly goes to one side and is called a deviation. The main reasons and exclusion methods are as follows: 1. The difference in pressure between the left and right tires is so great that the scroll speeds on both sides are not the same, causing the tractor to run off. When inflating, ensure that the tire pressures on both sides are the same and the wells should check the inflation limit in time. 2. The free travel of the steering wheel increases, causing the steering control to malfunction. When the tractor is driving on uneven roads or obstacles such as stones, the front wheels are automatically steered, causing the tractor to suddenly run away. The free travel of the steering wheel should be checked. If the stroke is too large, it should be adjusted. Normally, the degree of freedom of the steering wheel should be in the range of 15-25. 3. The front axis is inclined or bent. Or knuckle shaft deformation, resulting in tractor deviation. 4. Wear on both sides of the rear tire is not the same or old and new use. Different patterns. Different adhesion performance, the tractor is easy to slip when running. Both sides of the tire should be used interchangeably. In addition, it is best to replace the tires in pairs. Second, the reason why the track-type tractor automatic deviation in the track-type tractor in normal driving, when not pulling the left and right joysticks, and automatic deviation from the direction of travel (left or right), commonly known as self-running. 1. The torques transmitted to the drive wheels on both sides are not equal, making the rotational speeds of the drive wheels on the two sides different. Such as: 1 side steering clutch lever is not properly adjusted, its free travel is too small or no free trip. The steering clutch is in a semi-separated and semi-engaged state; 2 the steering clutch is filled with oil and the clutch plate is stained with oil and slippage; 1 the steering clutch friction plate burns; 4 the steering clutch spring force becomes weak, etc., and one side of the driving wheel appears. Reduced speed, so that the locomotive to the low speed side deflection. 2. There is a difference in the speed of the track shoes on both sides of the movement. Such as: 1 both sides of the track plate pin hole and track connection pin wear inconsistent, the wear side of the serious track pull plate pitch increases, so there will be a drive wheel rotation at the same angle on both sides of the track plate walking distance is not equal; 2 The tension of the track shoes on both sides is inconsistent. The loose track on one side slips on the drive wheel. When the crawler belt and the drive wheel (the gear mushroom head) are worn badly, there will be jumping in the road; 3 In addition, the locomotive is running . The area of ​​the soil contacted by the track shoes on both sides, the difference between the hardness and the softness of the soil, and the difference in the dryness and the wetness; 4 When the locomotive is traction, the loads on the track shoes on both sides are different, which will cause the adhesion of the crawler on one side to occur. Variety. The above phenomenon is the cause of the automatic deviation of crawler tractors. When the track-type tractor appears to automatically deviate. It should be ruled out based on its specific reasons. The following preventive measures should be taken during use: 1 Ensure that the steering clutch technology state is always in good condition and the speeds of the two drive wheels are equal. 2 Check the wear of the track hole and the connecting pin at any time and replace it if necessary. Try to make the pitch of the track on both sides equal. You can use the method of measuring the length of the track assembly when the number of two-folded track plates is equal, and depending on the situation, align some of the track shoes to the left and right, so that the total length of the two tracks is equal. 3 Correctly adjust the tension of the crawler on the left and right sides; use the worn drive wheel to change the edge and eliminate the slippage of the crawler on the drive wheel. 4 Reasonably adjust the attachment point of the agricultural implement on the tractor so that the traction point can pass the vertical symmetrical money of the tractor so that the two sides of the tractor have the same load. 1 Try to avoid long-term use of one-way steering clutch, so that both sides of the walking system wear as much as possible. All these measures can effectively solve and prevent crawler tractors from automatically listening to partial deviations.