Bus front axle bending inspection method and precautions
How to check the bending of the bus front axle ? What should I pay attention to when checking the front axle of the bus? Let's take a look at the bus front axle inspection method and precautions, I hope to help everyone.
Bus front axle bending inspection method
1. The front axle of the bus is bent or twisted horizontally. Check whether the center line of the two main pin holes of the front axle of the bus and the center line of the two leaf spring seat holes are located on the same longitudinal section of the front axle of the bus. The standard value of the center of the pin hole (upper end) should not exceed ±15′.
2. When checking the twist, observe from the side of the two kingpins (perpendicular to the center plane of the two leaf spring seat holes). If the two kingpins are perpendicular to each other, the front axle of the bus is not twisted. Otherwise it needs to be corrected.
3. When checking the horizontal bending, the front axle of the bus can be horizontally clamped on the vise, and the knuckle pin can be inserted into the main pin hole of the front axle of the bus, and a string can be pulled through the center at the upper end of the two kingpins. Observing above the front axle of the bus, when the string is aligned with the center hole of the two leaf spring seats, it indicates that the front axle of the bus is not bent in the horizontal direction. Otherwise, it needs to be calibrated with a press at room temperature.
4. The front axle of the bus is bent vertically. Check whether the two leaf spring seats are in the same plane, and the standard value of the flatness is not more than 0.25mm. If bent, correct or replace the bus front axle.
Bus front axle inspection precautions
1. When inspecting, insert a new kingpin into the kingpin hole to measure the angle of the kingpin hole inward. If it does not match the standard angle, it should be corrected.
2. When inspecting, a new kingpin can be inserted. If the upper and lower pins of the loose or the main pin hole are worn and flared, repair or replace the front axle of the bus.
3. When inspecting, if there is a crack in the front axle of the bus, or if the leaf spring seat is seriously worn, it should be replaced.
4. If the end face of the main pin hole is worn 2mm, it should be repaired.
The above is about the bending inspection method and precautions of the front axle of the bus. I hope everyone can understand the bending method and precautions of the front axle of the bus and it will help everyone.