One of the reasons is that the temperature in winter is low, and the viscosity of the lubricant increases. As a result, the return resistance of the steering spring increases, and the return time is too long. When the steering is completed, when the steering handle is released, the walking tractor still has to actively steer toward one side. One of the reasons is that the temperature in winter is low, and the viscosity of the lubricant increases. As a result, the return resistance of the steering spring increases, and the return time is too long. When the steering is completed, when the steering handle is released, the walking tractor still has to actively steer toward one side. The second reason is that the steering spring becomes soft, which leads to the active disengagement of the steering teeth on the side; or when the steering is completed, the steering teeth cannot be fitted back in time. The third reason is that when the spring is assembled, the direction is incorrectly installed, so that the spring is deformed or twisted and the steering gear is disengaged. The fourth reason is that when the gear is reinstalled or the gear is exchanged, the direction of the central transmission gear is mistakenly reversed, resulting in insufficient alignment of the dental arch, and when the load suddenly changes, the dental arch is disengaged, causing active steering. The fifth reason is that the speed reduction gear stop ring is damaged or comes out of the groove, resulting in the disengagement of the steering gear from the reduction gear; or the wear of the jaws respectively causes the teeth to be disengaged. Spice Novelties Co.,Limited , https://www.wholesale-adult-toys.cn