In recent years, due to the good legal adaptability of the dual steering front axle truck, the light and reasonable axle load distribution of the vehicle itself has been favored by market users; However, due to the different research, technology and supporting chains of truck manufacturers, there are many double steering front axle trucks on the market, which makes it difficult for maintenance shops to solve the problem.

Fault phenomenon

Many double steering front axle trucks, dump trucks and tractors often have sample failures: when the speed exceeds 45 km/h and the brake pedal is normally stepped on, the steering wheel swings back and forth at 2~4Hz. The driver cannot effectively control the steering wheel, and the braking effect is poor. This fault greatly reduces the safety and comfort of the whole vehicle. After the user of Baotou Beiben Heavy Truck Parts replaced the wheel hub, rim, brake, brake pad and other components, the fault still exists.

fault analysis 

Baotou Beiben Heavy Truck Accessories When the chassis of a new car is maintained for the second time, the steering wheel swing frequency is high when braking after the front wheel hub is removed. The instrument detects that the front wheel hub of the vehicle with fault has amplitude "out of round". The results show that the steering wheel swing is "out of round" due to the wheel hub when braking the dual steering front axle truck.

The wheel hub cutting equipment is used to cut the "out of roundness" repair of the wheel valley, and the fault still exists after the wheel hub, rim and tire are reloaded. Then the hub was removed for inspection. Now the hub of Baotou Beiben Heavy Truck accessory has been re inspected for "out of roundness". The results show that the problem of steering wheel swing during the braking of double steering front axle truck can be effectively solved by single "out of round" repair of wheel hub.

Continue to analyze the cause: after each repair, the wheel hub will be loaded, and "out of roundness" will occur again. During this period, only one process was carried out, that is, rim screw tightening. Confirmation: After a single repair, the hub will be meshed with the rim through the rim screws, which will cause local deformation again, leading to "out of round", and the steering wheel will still swing when braking.

Troubleshooting

First mesh and fasten the hub rim, and install the hub cutting equipment for "out of round" repair to avoid the re tightening process of the hub rim. During the loading test, the steering wheel wobble disappears during braking.

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