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Analysis and Solution to the Causes of "Daze" of Tractor Wheels
The “daze†phenomenon of tractor wheels means that when the tractor is running and transporting, especially when driving on bumpy roads, sometimes the wheels are suddenly stuck without turning the brake pedal, and long-distance tires appear on the road. After dragging, or after pressing the brake pedal to stop, when the brake pedal is released to continue driving, the wheels do not turn. Analysis of the reasons: 1. Due to the serious wear between the brake pin axle of the trailer and the axle hole of the brake shoe pin, the gap becomes large and the brake shoe is not stable in the brake drum. When the car bumps violently, the brake shoe is The friction pad partially comes in contact with the brake drum, creating frictional resistance that causes the wheel to "stare." 2, the brake shoe return spring elasticity is insufficient, when the pedal is relaxed, after the brake cam returns, the friction plate is still in the braking position, the tire is in the braking state, resulting in the wheel "a daze." 3. When installing and adjusting the friction plate, the clearance between the friction plate and the brake drum is too small or there is no gap, and the wheel is in a semi-braked state and the wheel will be in a daze. Remedy: 1. If the wheel appears “a daze†during the transport operation, stop the car, step on the brake pedal a few times, or knock on the brake drum. Loosen the car backwards and the wheels may turn. 2. If the wheels are "stunned" due to lack of return spring elasticity, replace the return springs and bearings. 3. If the brake pin shaft and the pin shaft hole are seriously worn out, parts can be replaced, and the worn shaft and hole can be rounded and a bushing can be added. In addition, the gap between the friction plate and the brake drum should be adjusted to normal. The tightness of the nut outside the bearing should be tightened in the end so that the bearing has no clearance but can be flexibly rotated.